Machining Engineer jobs at Block and - 24 jobs

Block is one company built from many blocks, all united by the same purpose of economic empowerment. The blocks that form our foundational teams - People, Finance, Counsel, Hardware, Information Security, Platform Infrastructure Engineering, and more - provide support and guidance at the corporate level. They work across business groups and around the globe, spanning time zones and disciplines to develop inclusive People policies, forecast finances, give legal counsel, safeguard systems, nurture new initiatives, and more. Every challenge creates possibilities, and we need different perspectives to see them all. Bring yours to Block. The Role Block uses Machine Learning and AI across many of its products and domains. For ML practitioners Block-wide, the ML Inference & Training team provides critical infrastructure, platforms, and libraries required to develop, productionize, and observe ML models. We are an established team of 13 engineers and 1 manager across a few countries and timezones, sitting within the ML & Data Platform organization. Our projects cover extending mature platforms (e.g online ML hosting/inference, internal python SDKs) as well as greenfield initiatives such as LLM hosting/monitoring, rearchitecting our training stack, or building out new tooling for large-scale offline evaluations. We are looking for an enthusiastic and experienced Machine Learning Engineer to join our team and help us build out the best ML infrastructure possible. In this role, you'll work closely with applied ML teams across Block to understand their challenges - scoping and exploring opportunities to improve their ability to deliver novel ML solutions at scale. You'll work on high-visibility, meaningful projects that can have a significant impact on Block's continued success with ML, influencing our roadmap and working across the ML Lifecycle. We welcome individuals who are passionate about building for the real world, embracing pragmatic approaches, and seeing challenges from fresh, nontraditional viewpoints. You Will Develop scalable ML/AI systems and platforms Be on the cutting edge of advancements in ML/AI across the industry Collaborate across diverse teams to deliver impactful platform solutions by understanding and generalizing the problems of cross-functional stakeholders Support critical ML systems used for fraud detection, language models, recommendation systems and underwriting Influence our roadmap and ensure we're working on the highest impact problems within the ML infrastructure domain You Have 8+ years of experience in software development and/or machine learning experience with a focus on internal platforms or infrastructure Deep understanding of architectures for ML-backed solutions and the ML lifecycle - from data gathering, training, model evaluation, MLOps, and productionizing models (both classical ML and deep learning/LLMs) A desire to understand our clients' needs in order to design tools and systems that solve our customer's problems. As a platform team, our main customers are internal developers and products Ability to produce production-quality code and services incorporating testing, evaluation, monitoring as well as the ability to quickly adapt to a new domain, hack MVP's, and iterate to improve product Experience using any of the major cloud vendors for high scale production use cases Strong communication skills (verbal and written) with technical and non-technical stakeholders Technologies We Use and Teach We value general and versatile engineering skill over specific experience with our current stack, but some examples: Golang, Python, TypeScript, React gRPC, Protocol Buffers AWS (Sagemaker, EC2, EKS), Databricks NVIDIA Triton, vLLM, ONNX We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class. We will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and "fair chance" ordinances. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build a workplace that is fair and square? Check out our I+D page. While there is no specific deadline to apply for this role, U.S. roles are typically open for an average of 55 days before being filled by a successful candidate. Please refer to the date listed at the top of this job page for when this role was first posted. Block takes a market-based approach to pay, and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate's starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future. To find a location's zone designation, please refer to this resource. If a location of interest is not listed, please speak with a recruiter for additional information. Zone A:$228,700-$343,100 USDZone B: $217,300-$325,900 USDZone C:$205,900-$308,900 USDZone D:$194,500-$291,700 USD Use of AI in Our Hiring Process We may use automated AI tools to evaluate job applications for efficiency and consistency. These tools comply with local regulations, including bias audits, and we handle all personal data in accordance with state and local privacy laws. Contact us here with hiring practice or data usage questions. Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want. Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering. Check out our other benefits at Block. Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we're helping build a financial system that is open to everyone. 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TIDAL was founded for artists by artists as the next innovative streaming platform to bring value back to the music industry. We empower artists with the products, resources, services, and content required to take control of their careers and connect more deeply with fans. Available in over 60+ countries, TIDAL continues to help artists break down economic barriers to continue creating what's next in culture. TIDAL is part of Block, Inc. (NYSE: SQ), a global technology company with a focus on financial services. The Role The Personalization AI team uses AI/ML to directly support Tidal's mission to be the first consideration for an artist when they want to share their music. On the listener side, we algorithmically surface music artists have shared by creating playlists, making recommendations, and supporting advanced search. We collaborate closely with Design, Business and engineering teams across TIDAL and the rest of Block. We use a wide range of models including simple heuristics, embeddings, deep learning and large-language models. You Will Lead strategic initiatives in Personalization & AI Engineering, driving the vision, architecture, and execution Develop new AI/ML systems that power Tidal's homepage including semantic search, recommendations, UX and playlists Build production systems that personalize the listener's experience Be a technical leader and establish quality practices that stick, make broader design decisions and set an example for others to follow Collaborate with a cross functional team of designers, business partners, and software engineers to build new technologies and features Design experiments, test them on production users, analyze and repeat You Have 12+ years building and operating quality software 5+ years of experience with recommender systems, ranking systems, or similar Led the development of complex models trained on large datasets powering customer facing features Strong software engineering skills Strong communication skills and customer empathy Experience with PyTorch, PySpark, Databricks and AWS is a plus We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class. We will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and "fair chance" ordinances. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build a workplace that is fair and square? Check out our I+D page. While there is no specific deadline to apply for this role, U.S. roles are typically open for an average of 55 days before being filled by a successful candidate. Please refer to the date listed at the top of this job page for when this role was first posted. Block takes a market-based approach to pay, and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate's starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future. To find a location's zone designation, please refer to this resource. If a location of interest is not listed, please speak with a recruiter for additional information. Zone A:$228,700-$343,100 USDZone B: $217,300-$325,900 USDZone C:$205,900-$308,900 USDZone D:$194,500-$291,700 USD Use of AI in Our Hiring Process We may use automated AI tools to evaluate job applications for efficiency and consistency. These tools comply with local regulations, including bias audits, and we handle all personal data in accordance with state and local privacy laws. Contact us at privacy@block.xyz with hiring practice or data usage questions. Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want. Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering. Check out our other benefits at Block. Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we're helping build a financial system that is open to everyone. Privacy Policy

Block is one company built from many blocks, all united by the same purpose of economic empowerment. The blocks that form our foundational teams - People, Finance, Counsel, Hardware, Information Security, Platform Infrastructure Engineering, and more - provide support and guidance at the corporate level. They work across business groups and around the globe, spanning time zones and disciplines to develop inclusive People policies, forecast finances, give legal counsel, safeguard systems, nurture new initiatives, and more. Every challenge creates possibilities, and we need different perspectives to see them all. Bring yours to Block. The Role Block is organized into business groups, each with dedicated product and engineering teams. Our team plays a vital role in delivering better-than-human customer support experiences, using AI to make support faster, smarter, and more reliable. By improving how millions of customers get support, we build lasting trust and create meaningful operational leverage across Block. We are looking for an enthusiastic and experienced Machine Learning Engineer to join our team to build AI customer support products. In this role, you will collaborate closely with teams across Block to understand their challenges and opportunities. You'll design, develop, and launch AI driven features and tools that solve real customer needs, working in an environment that values creativity, experimentation, and practical problem solving. This is a unique opportunity to shape the future of AI-powered support at Block. You will work on projects that directly impact customers, advocates, and the business, transforming how we serve people and scale trust. We are looking for builders who are passionate about pragmatic AI, motivated by real world impact, and excited to build systems that help people get the help they need. You Will Leverage AI to automate support workflows and deliver new AI-powered support product experiences Design, build, and maintain scalable machine learning systems, including developing, fine-tuning, and integrating large language models and related systems, that power real customer and advocate experiences. Collaborate cross-functionally with product, engineering, design, and operations teams to ship impactful AI features at scale Build generative AI systems that scale intelligently across multiple business units, adapting to diverse products, users, and use cases Stay current on the latest developments in LLMs and applied ML, assessing where new techniques (e.g., RAG, distillation, fine-tuning, prompt orchestration) can enhance our systems. Mentor peers and contribute to technical documentation, design reviews, and shared best practices that raise the engineering bar for applied ML systems. You Have 8+ years of experience in training and deploying ML models, developing ML software, and shipping customer-facing ML products. Deep understanding of modern ML techniques (e.g. Large Language Models) and the ML lifecycle from data gathering, training, model evaluation, MLOps, and productionizing models. Ruthless pragmatism when solving new and unconventional problems A desire to understand our clients' needs in order to design tools and systems that solve our customer's problems. As a platform team, our main customers are internal developers and products. Ability to produce production-quality code and services incorporating testing, evaluation, monitoring as well as the ability to quickly adapt to a new domain, hack MVP's, and iterate to improve product. Experience using any of the major cloud vendors for high scale production use cases Strong communication skills (verbal and written) with technical and non-technical stakeholders. We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class. We will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and "fair chance" ordinances. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build a workplace that is fair and square? Check out our I+D page. While there is no specific deadline to apply for this role, U.S. roles are typically open for an average of 55 days before being filled by a successful candidate. Please refer to the date listed at the top of this job page for when this role was first posted. Block takes a market-based approach to pay, and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate's starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future. Zone A: USD $228,700 - USD $343,100 Zone B: USD $217,300 - USD $325,900 Zone C: USD $205,900 - USD $308,900 Zone D: USD $194,500 - USD $291,700 Use of AI in Our Hiring Process We may use automated AI tools to evaluate job applications for efficiency and consistency. These tools comply with local regulations, including bias audits, and we handle all personal data in accordance with state and local privacy laws. Contact us at privacy@block.xyz with hiring practice or data usage questions. Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want. Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering. Check out our other benefits at Block. Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we're helping build a financial system that is open to everyone. Privacy Policy

Block is one company built from many blocks, all united by the same purpose of economic empowerment. The blocks that form our foundational teams - People, Finance, Counsel, Hardware, Information Security, Platform Infrastructure Engineering, and more - provide support and guidance at the corporate level. They work across business groups and around the globe, spanning time zones and disciplines to develop inclusive People policies, forecast finances, give legal counsel, safeguard systems, nurture new initiatives, and more. Every challenge creates possibilities, and we need different perspectives to see them all. Bring yours to Block. Block's Support ML Modeling team is a central driver of innovation in customer support experiences across our entire ecosystem-including Cash App, Square, and other business units. We are dedicated to advancing the state of intelligent, automated support through machine learning and generative AI. From customer-facing chatbots to smart internal tools for agents, our team builds high-impact, scalable systems that improve support quality, efficiency, and accessibility. We're building the future of support at Block: one powered by AI, voice interfaces, and smart automation. We're looking for candidates with a passion for intelligent systems, practical ML experience, and a desire to build product-driven solutions. You Will Lead R&D efforts to explore and prototype next-generation chatbot architectures using LLMs, retrieval-augmented generation (RAG), fine-tuning, and real-time inference Design and deploy ML models powering conversational agents, including the support chatbot used across Cash App, Square, and other Block products Build generative AI systems that scale intelligently across multiple business units, adapting to diverse products, users, and use cases Advance voice support automation, enabling natural, responsive, and accurate voice-based interactions Develop systems to infer customer intent, enabling effective routing, triaging, and resolution of cases with minimal human involvement Create ML-powered tooling and real-time recommendation systems to assist support agents and enhance customer outcomes Engineer robust, reusable modeling pipelines capable of high throughput, rapid iteration, and easy deployment Collaborate cross-functionally with product, engineering, design, and operations teams to ship impactful ML features at scale You Have 6+ years of experience in machine learning, applied AI, or product ML roles Demonstrated experience with language models, dialog systems, or generative AI in production Strong knowledge of NLP, deep learning, and ML infrastructure best practices Experience with speech processing or voice interfaces is a strong plus Proven ability to ship end-to-end ML features-framing problems, prototyping, training, evaluation, and deployment Experience designing scalable model pipelines and maintaining production ML services Excellent communication skills and a collaborative mindset Enthusiasm for R&D and pushing the boundaries of what AI can do for support Technologies We Use and Teach Python, PyTorch, TensorFlow, or JAX We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class. We also consider qualified applicants with criminal histories for employment on our team, and always assess candidates on an individualized basis. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build a workplace that is fair and square? Check out our I+D page. Block will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and “fair chance” ordinances. Block takes a market-based approach to pay, and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate's starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future. To find a location's zone designation, please refer to this resource. If a location of interest is not listed, please speak with a recruiter for additional information. Zone A:$198,000-$297,000 USDZone B: $188,100-$282,100 USDZone C:$178,200-$267,400 USDZone D:$168,300-$252,500 USD Use of AI in Our Hiring Process We may use automated AI tools to evaluate job applications for efficiency and consistency. These tools comply with local regulations, including bias audits, and we handle all personal data in accordance with state and local privacy laws. Contact us here with hiring practice or data usage questions. Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want. Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering. Check out our other benefits at Block. Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we're helping build a financial system that is open to everyone. Privacy Policy

Since we opened our doors in 2009, the world of commerce has evolved immensely, and so has Square. After enabling anyone to take payments and never miss a sale, we saw sellers stymied by disparate, outmoded products and tools that wouldn't work together. So we expanded into software and started building integrated, omnichannel solutions - to help sellers sell online, manage inventory, offer buy now, pay later functionality, book appointments, engage loyal buyers, and hire and pay staff. Across it all, we've embedded financial services tools at the point of sale, so merchants can access a business loan and manage their cash flow in one place. Afterpay furthers our goal to provide omnichannel tools that unlock meaningful value and growth, enabling sellers to capture the next generation shopper, increase order sizes, and compete at a larger scale. Today, we are a partner to sellers of all sizes - large, enterprise-scale businesses with complex operations, sellers just starting, as well as merchants who began selling with Square and have grown larger over time. As our sellers grow, so do our solutions. There is a massive opportunity in front of us. We're building a significant, meaningful, and lasting business, and we are helping sellers worldwide do the same. The Role Block's Chargeback Risk Machine Learning team members build machine learning models and systems to precisely detect, intervene on, and reduce fraudulent activity across Block's Cash App and Square ecosystems. As part of our team, you and your work will safeguard the Cash App and Square ecosystems from financial loss and provide trustworthy and seamless financial experiences for millions of customers and sellers. You Will Partner with product, engineering, data science, policy, and operations to design and productionize ML-driven solutions to fight fraud at scale Become a risk domain expert and expert to lead strategy and planning on your workstreams. Develop tooling and processes to improve the effectiveness and speed of the ML development lifecycle Investigate and use state-of-the-art modeling algorithms and third-party data sources to boost model performance Contribute positively to our team culture as a collaborative, empathetic, and reliable teammate. You Have 3+ years of machine learning experience A degree (preferably graduate level) in Computer Science, Engineering, Statistics, Physics, Applied Math or a related technical field Hands-on experience independently designing, deploying, and troubleshooting ML solutions using methods such as tree-based models, deep learning, transfer learning, or reinforcement learning. Proficiency in modern ML stacks such as: PySpark, PyTorch, MLflow, GCP Vertex AI, Workflow orchestration tools (i.e. Airflow, Prefect) Proficiency with containerization, cloud platforms (AWS, GCP), and CI/CD practices. Experience collaborating with cross-functional teams to prioritize, scope, and deploy ML/AI solutions at scale Experience helping your teammates grow through mentorship and providing constructive feedback. A natural sense of curiosity, and experience with Block's mission of economic empowerment. Block takes a market-based approach to pay, and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate's starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future. To find a location's zone designation, please refer to this resource. If a location of interest is not listed, please speak with a recruiter for additional information. Zone A:$189,000-$283,600 USDZone B: $179,600-$269,400 USDZone C:$170,100-$255,100 USDZone D:$160,700-$241,100 USD Use of AI in Our Hiring Process We may use automated AI tools to evaluate job applications for efficiency and consistency. These tools comply with local regulations, including bias audits, and we handle all personal data in accordance with state and local privacy laws. Contact us at privacy@block.xyz with hiring practice or data usage questions. Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want. Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering. Check out our other benefits at Block. Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we're helping build a financial system that is open to everyone. Privacy Policy

Since we opened our doors in 2009, the world of commerce has evolved immensely, and so has Square. After enabling anyone to take payments and never miss a sale, we saw sellers stymied by disparate, outmoded products and tools that wouldn't work together. So we expanded into software and started building integrated, omnichannel solutions - to help sellers sell online, manage inventory, offer buy now, pay later functionality, book appointments, engage loyal buyers, and hire and pay staff. Across it all, we've embedded financial services tools at the point of sale, so merchants can access a business loan and manage their cash flow in one place. Afterpay furthers our goal to provide omnichannel tools that unlock meaningful value and growth, enabling sellers to capture the next generation shopper, increase order sizes, and compete at a larger scale. Today, we are a partner to sellers of all sizes - large, enterprise-scale businesses with complex operations, sellers just starting, as well as merchants who began selling with Square and have grown larger over time. As our sellers grow, so do our solutions. There is a massive opportunity in front of us. We're building a significant, meaningful, and lasting business, and we are helping sellers worldwide do the same. The Role Block's Chargeback Risk Machine Learning team members build machine learning models and systems to precisely detect, intervene on, and reduce fraudulent activity across Block's Cash App and Square ecosystems. As part of our team, you and your work will safeguard the Cash App and Square ecosystems from financial loss and provide trustworthy and seamless financial experiences for millions of customers and sellers. You Will Partner with product, engineering, data science, policy, and operations to design and productionize ML-driven solutions to fight fraud at scale Become a risk domain expert and expert to lead strategy and planning on your workstreams. Develop tooling and processes to improve the effectiveness and speed of the ML development lifecycle Investigate and use state-of-the-art modeling algorithms and third-party data sources to boost model performance Contribute positively to our team culture as a collaborative, empathetic, and reliable teammate. You Have 3+ years of machine learning experience A degree (preferably graduate level) in Computer Science, Engineering, Statistics, Physics, Applied Math or a related technical field Hands-on experience independently designing, deploying, and troubleshooting ML solutions using methods such as tree-based models, deep learning, transfer learning, or reinforcement learning. Proficiency in modern ML stacks such as: PySpark, PyTorch, MLflow, GCP Vertex AI, Workflow orchestration tools (i.e. Airflow, Prefect) Proficiency with containerization, cloud platforms (AWS, GCP), and CI/CD practices. Experience collaborating with cross-functional teams to prioritize, scope, and deploy ML/AI solutions at scale Experience helping your teammates grow through mentorship and providing constructive feedback. A natural sense of curiosity, and experience with Block's mission of economic empowerment. Block takes a market-based approach to pay, and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate's starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future. To find a location's zone designation, please refer to this resource. If a location of interest is not listed, please speak with a recruiter for additional information. Zone A:$189,000-$283,600 USDZone B: $179,600-$269,400 USDZone C:$170,100-$255,100 USDZone D:$160,700-$241,100 USD Use of AI in Our Hiring Process We may use automated AI tools to evaluate job applications for efficiency and consistency. These tools comply with local regulations, including bias audits, and we handle all personal data in accordance with state and local privacy laws. Contact us at privacy@block.xyz with hiring practice or data usage questions. Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want. Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering. Check out our other benefits at Block. Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we're helping build a financial system that is open to everyone. Privacy Policy

Block is one company built from many blocks, all united by the same purpose of economic empowerment. The blocks that form our foundational teams - People, Finance, Counsel, Hardware, Information Security, Platform Infrastructure Engineering, and more - provide support and guidance at the corporate level. They work across business groups and around the globe, spanning time zones and disciplines to develop inclusive People policies, forecast finances, give legal counsel, safeguard systems, nurture new initiatives, and more. Every challenge creates possibilities, and we need different perspectives to see them all. Bring yours to Block. The Role Block's Support ML Modeling team is a central driver of innovation in customer support experiences across our entire ecosystem-including Cash App, Square, and other business units. We are dedicated to advancing the state of intelligent, automated support through machine learning and generative AI. From customer-facing chatbots to smart internal tools for agents, our team builds high-impact, scalable systems that improve support quality, efficiency, and accessibility. We're building the future of support at Block: one powered by AI, voice interfaces, and smart automation. We're looking for candidates with a passion for intelligent systems, practical ML experience, and a desire to build product-driven solutions. Our ideal candidate is a leader in the field, with a proven track record of building ML systems that can accelerate our ability to scale our conversational AI initiatives. You Will Lead the end-to-end delivery of multiple ML initiatives, from planning and design through rollout, documentation, and long-term maintenance Partner strategically with risk, product, engineering, design, and operations leaders to define and drive long term ML roadmaps, informed by domain expertise and industry trends Guide the team's direction, identifying new ML/AI opportunities and advising leadership on strategic tradeoffs and opportunities Drive R&D efforts exploring next-generation chatbot architectures using LLMs, RAG, fine-tuning, and real-time inference Design, deploy, and maintain ML models powering conversational agents including support chatbots across Cash App, Square, and other Block products Develop ML-powered tools and real time recommendation systems that enhance support agent effectiveness and customer outcomes Act as the technical representative for your team's systems and programs, clearly communicating work and results to stakeholders, cross-functional partners, and external audiences You Have 10+ years of experience in machine learning, applied AI, or product ML roles, with deep technical expertise Demonstrated leadership capabilities, with the ability to influence and align cross-functional teams while directly shaping the work of peers through communication, context sharing, and technical guidance A track record of delivering organizational wide impact, shaping systems, frameworks, or initiatives that raise the bar across multiple teams or functions Proven ability to ship end to end ML features from problem framing through deployment and long-term maintenance Demonstrated experience with language models, dialog systems, or generative AI in production Strong foundation in NLP, deep learning, or ML infrastructure best practices. Excellent communication skills, with the ability to represent the team's work to leadership and stakeholders Enthusiasm for R&D and pushing the boundaries of applied AI to transform conversational systems Technologies We Use and Teach Languages & Frameworks: Python, PyTorch, TensorFlow, JAX Model Types: Transformer, LLMs, Retrieval-Augmented Generation (RAG), classifiers, ranking models Tooling: ML pipelines, batch/real-time inference, experiment tracking tools We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class. We will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and “fair chance” ordinances. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build a workplace that is fair and square? Check out our I+D page. While there is no specific deadline to apply for this role, U.S. roles are typically open for an average of 55 days before being filled by a successful candidate. Please refer to the date listed at the top of this job page for when this role was first posted. Block takes a market-based approach to pay, and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate's starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future. To find a location's zone designation, please refer to this resource. If a location of interest is not listed, please speak with a recruiter for additional information. Zone A: $276,800-$415,200 USD Zone B: $276,800-$415,200 USD Zone C: $276,800-$415,200 USD Zone D: $276,800-$415,200 USD Use of AI in Our Hiring Process We may use automated AI tools to evaluate job applications for efficiency and consistency. These tools comply with local regulations, including bias audits, and we handle all personal data in accordance with state and local privacy laws. Contact us here with hiring practice or data usage questions. Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want. Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering. Check out our other benefits at Block. Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we're helping build a financial system that is open to everyone. Privacy Policy

The Role The Risk Signals and Controls team's mission is to power Block's risk decisions with trusted signals and lean, effective models built on evolving data. We do that by building efficient tools and workflows to accelerate fraud detection and model effectiveness evaluating thousands of transactions per second in real time. We closely collaborate with ML Modellers and Software Engineers from across Block to optimize the signal lifecycle to improve signal quality, reduce noise, and accelerate time-to-insight. We're also excited to explore new directions with the team to continue pushing the boundaries of what's possible. You Will Design, build, and maintain data pipelines to ingest third parties and Block data to enhance our feature store and modeling capabilities. Design elegant ML pipelines and services, prototype new approaches, and productionize solutions at scale. Build tooling to help maintain our features and models, gaining efficiencies in fraud detection. Work hand-in-hand with ML Modelers to identify and integrate new data sources, heuristics and models. Solve challenging technical problems at scale, collaborating with colleagues located across the globe Apply ML and engineering best practices to shape how Block develops, tests, and maintains ML-platform solutions. Ensure data quality and completeness through automated validation, monitoring, and alerting. Own your solutions from design through to operation: we all share the pager! You Have 12+ years of experience in software development and demonstrated technical initiative and leadership on previous machine learning projects. A proven ability to shape how teams effectively adopt and evolve AI practices; driving adoption of AI-first workflows by coaching leaders, identifying scalable use cases, and embedding quality and accountability in team norms. Work autonomously in a fast paced, ambiguous and unpredictable environment Natural curiosity & eagerness to learn Show the ability to take initiative, lead, and drive creative solutions in cross-team contexts. A strong interest in owning your solutions, maintaining and fixing them as necessary Communicate via clear and concise writing to facilitate asynchronous collaboration across multiple time zones Reason about complex, distributed systems at high scale Proficiency in machine learning techniques, experimental design and data engineering Strong programming skills in languages such as Kotlin, Python, TensorFlow, or PyTorch Technologies We Use and Teach We value general engineering skill and versatility over existing domain knowledge, but here's a sample of what we currently use: Python, Java and Kotlin HTTP, JSON, gRPC, Protocol Buffers AWS, Databricks, and Kubernetes MySQL, DynamoDB, Kafka, Spark Prefect, Airflow We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is a proud equal opportunity employer. We work hard to evaluate all employees and job applicants consistently, based solely on the core competencies required of the role at hand, and without regard to any legally protected class. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build an inclusive workplace? Check out our Inclusion & Diversity page Full-time employee benefits include the following: Healthcare coverage (Medical, Vision and Dental insurance) Health Savings Account and Flexible Spending Account Retirement Plans including company match Employee Stock Purchase Program Wellness programs, including access to mental health, 1:1 financial planners, and a monthly wellness allowance Paid parental and caregiving leave Paid time off (including 12 paid holidays) Paid sick leave (1 hour per 26 hours worked (max 80 hours per calendar year to the extent legally permissible) for non-exempt employees and covered by our Flexible Time Off policy for exempt employees) Learning and Development resources Paid Life insurance, AD&D, and disability benefits These benefits are further detailed in Block's policies. This role is also eligible to participate in Block's equity plan subject to the terms of the applicable plans and policies, and may be eligible for a sign-on bonus. Sales roles may be eligible to participate in a commission plan subject to the terms of the applicable plans and policies. Pay and benefits are subject to change at any time, consistent with the terms of any applicable compensation or benefit plans. Block takes a market-based approach to pay, and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate's starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future. To find a location's zone designation, please refer to this resource. If a location of interest is not listed, please speak with a recruiter for additional information. Zone A:$276,800-$415,200 USDZone B: $276,800-$415,200 USDZone C:$276,800-$415,200 USDZone D:$276,800-$415,200 USD Use of AI in Our Hiring Process We may use automated AI tools to evaluate job applications for efficiency and consistency. These tools comply with local regulations, including bias audits, and we handle all personal data in accordance with state and local privacy laws. Contact us here with hiring practice or data usage questions. Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want. Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering. Check out our other benefits at Block. Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we're helping build a financial system that is open to everyone. Privacy Policy

The Role As a Staff Machine Learning Engineer in Fraud and Abuse ML Engineering, you will play a central role in designing, building, and evolving the machine learning systems that safeguard Block's ecosystem from fraud, abuse, and other malicious activity. You will architect and lead the development of high-scale, real-time ML systems that power our fraud decisioning across the Block network, protecting millions of customers and merchants while maintaining seamless user experiences. You Will Build and maintain real-time and batch data pipelines/APIs to support ML model inference at scale. Design elegant ML pipelines and services, prototype new approaches, and productionize solutions at scale. Collaborate with product and engineering teams to define data models and schemas for consistent and structured data flow. Integrate and enrich diverse internal and third-party data sources to enhance our feature store and modeling capabilities. Ensure data quality and completeness through automated validation, monitoring, and alerting. Develop new triggers and event hooks that support enhanced risk evaluations and detections. Participate in SEV management by rapidly integrating new data, deploying new features, and implementing stopgap controls to mitigate risk. Apply ML and engineering best practices to shape how Block develops, tests, and maintains ML-platform solutions. Support the integration of risk decisions and scores into downstream systems, ensuring they are consumed and acted upon correctly. You Have 12+ years of experience in software development and demonstrated technical initiative and leadership on previous machine learning projects. A proven ability to shape how teams effectively adopt and evolve AI practices; driving adoption of AI-first workflows by coaching leaders, identifying scalable use cases, and embedding quality and accountability in team norms. Experience leading experimentation cycles and building a shared understanding of how AI drives business outcomes. Curiosity and a passion for Block's mission of economic empowerment. Experience helping your teammates grow through mentorship and providing constructive feedback. A desire to be hands-on and help invent the future of AI. The ability to work autonomously in the rapidly evolving world of ML. Technologies We Use and Teach Python, Java and Kotlin Tensorflow and PyTorch AWS, Databricks and Kubernetes MySQL, DynamoDB, Kafka, Spark We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is a proud equal opportunity employer. We work hard to evaluate all employees and job applicants consistently, based solely on the core competencies required of the role at hand, and without regard to any legally protected class. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build an inclusive workplace? Check out our Inclusion & Diversity page Full-time employee benefits include the following: Healthcare coverage (Medical, Vision and Dental insurance) Health Savings Account and Flexible Spending Account Retirement Plans including company match Employee Stock Purchase Program Wellness programs, including access to mental health, 1:1 financial planners, and a monthly wellness allowance Paid parental and caregiving leave Paid time off (including 12 paid holidays) Paid sick leave (1 hour per 26 hours worked (max 80 hours per calendar year to the extent legally permissible) for non-exempt employees and covered by our Flexible Time Off policy for exempt employees) Learning and Development resources Paid Life insurance, AD&D, and disability benefits These benefits are further detailed in Block's policies. This role is also eligible to participate in Block's equity plan subject to the terms of the applicable plans and policies, and may be eligible for a sign-on bonus. Sales roles may be eligible to participate in a commission plan subject to the terms of the applicable plans and policies. Pay and benefits are subject to change at any time, consistent with the terms of any applicable compensation or benefit plans. Block takes a market-based approach to pay, and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate's starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future. To find a location's zone designation, please refer to this resource. If a location of interest is not listed, please speak with a recruiter for additional information. Zone A:$276,800-$415,200 USDZone B: $276,800-$415,200 USDZone C:$276,800-$415,200 USDZone D:$276,800-$415,200 USD Use of AI in Our Hiring Process We may use automated AI tools to evaluate job applications for efficiency and consistency. These tools comply with local regulations, including bias audits, and we handle all personal data in accordance with state and local privacy laws. Contact us here with hiring practice or data usage questions. Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want. Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering. Check out our other benefits at Block. Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we're helping build a financial system that is open to everyone. Privacy Policy

Block is one company built from many blocks, all united by the same purpose of economic empowerment. The blocks that form our foundational teams - People, Finance, Counsel, Hardware, Information Security, Platform Infrastructure Engineering, and more - provide support and guidance at the corporate level. They work across business groups and around the globe, spanning time zones and disciplines to develop inclusive People policies, forecast finances, give legal counsel, safeguard systems, nurture new initiatives, and more. Every challenge creates possibilities, and we need different perspectives to see them all. Bring yours to Block. Block's Support ML Modeling team is a central driver of innovation in customer support experiences across our entire ecosystem-including Cash App, Square, and other business units. We are dedicated to advancing the state of intelligent, automated support through machine learning and generative AI. From customer-facing chatbots to smart internal tools for agents, our team builds high-impact, scalable systems that improve support quality, efficiency, and accessibility. We're building the future of support at Block: one powered by AI, voice interfaces, and smart automation. We're looking for candidates with a passion for intelligent systems, practical ML experience, and a desire to build product-driven solutions. You Will Lead R&D efforts to explore and prototype next-generation chatbot architectures using LLMs, retrieval-augmented generation (RAG), fine-tuning, and real-time inference Design and deploy ML models powering conversational agents, including the support chatbot used across Cash App, Square, and other Block products Build generative AI systems that scale intelligently across multiple business units, adapting to diverse products, users, and use cases Advance voice support automation, enabling natural, responsive, and accurate voice-based interactions Develop systems to infer customer intent, enabling effective routing, triaging, and resolution of cases with minimal human involvement Create ML-powered tooling and real-time recommendation systems to assist support agents and enhance customer outcomes Engineer robust, reusable modeling pipelines capable of high throughput, rapid iteration, and easy deployment Collaborate cross-functionally with product, engineering, design, and operations teams to ship impactful ML features at scale You Have 6+ years of experience in machine learning, applied AI, or product ML roles Demonstrated experience with language models, dialog systems, or generative AI in production Strong knowledge of NLP, deep learning, and ML infrastructure best practices Experience with speech processing or voice interfaces is a strong plus Proven ability to ship end-to-end ML features-framing problems, prototyping, training, evaluation, and deployment Experience designing scalable model pipelines and maintaining production ML services Excellent communication skills and a collaborative mindset Enthusiasm for R&D and pushing the boundaries of what AI can do for support Technologies We Use and Teach Python, PyTorch, TensorFlow, or JAX We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class. We also consider qualified applicants with criminal histories for employment on our team, and always assess candidates on an individualized basis. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build a workplace that is fair and square? Check out our I+D page. Block will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and "fair chance" ordinances.

The Role The Risk Signals and Controls team's mission is to power Block's risk decisions with trusted signals and lean, effective models built on evolving data. We do that by building efficient tools and workflows to accelerate fraud detection and model effectiveness evaluating thousands of transactions per second in real time. We closely collaborate with ML Modellers and Software Engineers from across Block to optimize the signal lifecycle to improve signal quality, reduce noise, and accelerate time-to-insight. We're also excited to explore new directions with the team to continue pushing the boundaries of what's possible. You Will Design, build, and maintain data pipelines to ingest third parties and Block data to enhance our feature store and modeling capabilities. Design elegant ML pipelines and services, prototype new approaches, and productionize solutions at scale. Build tooling to help maintain our features and models, gaining efficiencies in fraud detection. Work hand-in-hand with ML Modelers to identify and integrate new data sources, heuristics and models. Solve challenging technical problems at scale, collaborating with colleagues located across the globe Apply ML and engineering best practices to shape how Block develops, tests, and maintains ML-platform solutions. Ensure data quality and completeness through automated validation, monitoring, and alerting. Own your solutions from design through to operation: we all share the pager! You Have 12+ years of experience in software development and demonstrated technical initiative and leadership on previous machine learning projects. A proven ability to shape how teams effectively adopt and evolve AI practices; driving adoption of AI-first workflows by coaching leaders, identifying scalable use cases, and embedding quality and accountability in team norms. Work autonomously in a fast paced, ambiguous and unpredictable environment Natural curiosity & eagerness to learn Show the ability to take initiative, lead, and drive creative solutions in cross-team contexts. A strong interest in owning your solutions, maintaining and fixing them as necessary Communicate via clear and concise writing to facilitate asynchronous collaboration across multiple time zones Reason about complex, distributed systems at high scale Proficiency in machine learning techniques, experimental design and data engineering Strong programming skills in languages such as Kotlin, Python, TensorFlow, or PyTorch Technologies We Use and Teach We value general engineering skill and versatility over existing domain knowledge, but here's a sample of what we currently use: Python, Java and Kotlin HTTP, JSON, gRPC, Protocol Buffers AWS, Databricks, and Kubernetes MySQL, DynamoDB, Kafka, Spark Prefect, Airflow We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is a proud equal opportunity employer. We work hard to evaluate all employees and job applicants consistently, based solely on the core competencies required of the role at hand, and without regard to any legally protected class. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build an inclusive workplace? Check out our Inclusion & Diversity page Full-time employee benefits include the following: Healthcare coverage (Medical, Vision and Dental insurance) Health Savings Account and Flexible Spending Account Retirement Plans including company match Employee Stock Purchase Program Wellness programs, including access to mental health, 1:1 financial planners, and a monthly wellness allowance Paid parental and caregiving leave Paid time off (including 12 paid holidays) Paid sick leave (1 hour per 26 hours worked (max 80 hours per calendar year to the extent legally permissible) for non-exempt employees and covered by our Flexible Time Off policy for exempt employees) Learning and Development resources Paid Life insurance, AD&D, and disability benefits These benefits are further detailed in Block's policies. This role is also eligible to participate in Block's equity plan subject to the terms of the applicable plans and policies, and may be eligible for a sign-on bonus. Sales roles may be eligible to participate in a commission plan subject to the terms of the applicable plans and policies. Pay and benefits are subject to change at any time, consistent with the terms of any applicable compensation or benefit plans.

The Role As a Staff Machine Learning Engineer in Fraud and Abuse ML Engineering, you will play a central role in designing, building, and evolving the machine learning systems that safeguard Block's ecosystem from fraud, abuse, and other malicious activity. You will architect and lead the development of high-scale, real-time ML systems that power our fraud decisioning across the Block network, protecting millions of customers and merchants while maintaining seamless user experiences. You Will Build and maintain real-time and batch data pipelines/APIs to support ML model inference at scale. Design elegant ML pipelines and services, prototype new approaches, and productionize solutions at scale. Collaborate with product and engineering teams to define data models and schemas for consistent and structured data flow. Integrate and enrich diverse internal and third-party data sources to enhance our feature store and modeling capabilities. Ensure data quality and completeness through automated validation, monitoring, and alerting. Develop new triggers and event hooks that support enhanced risk evaluations and detections. Participate in SEV management by rapidly integrating new data, deploying new features, and implementing stopgap controls to mitigate risk. Apply ML and engineering best practices to shape how Block develops, tests, and maintains ML-platform solutions. Support the integration of risk decisions and scores into downstream systems, ensuring they are consumed and acted upon correctly. You Have 12+ years of experience in software development and demonstrated technical initiative and leadership on previous machine learning projects. A proven ability to shape how teams effectively adopt and evolve AI practices; driving adoption of AI-first workflows by coaching leaders, identifying scalable use cases, and embedding quality and accountability in team norms. Experience leading experimentation cycles and building a shared understanding of how AI drives business outcomes. Curiosity and a passion for Block's mission of economic empowerment. Experience helping your teammates grow through mentorship and providing constructive feedback. A desire to be hands-on and help invent the future of AI. The ability to work autonomously in the rapidly evolving world of ML. Technologies We Use and Teach Python, Java and Kotlin Tensorflow and PyTorch AWS, Databricks and Kubernetes MySQL, DynamoDB, Kafka, Spark We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is a proud equal opportunity employer. We work hard to evaluate all employees and job applicants consistently, based solely on the core competencies required of the role at hand, and without regard to any legally protected class. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build an inclusive workplace? Check out our Inclusion & Diversity page Full-time employee benefits include the following: Healthcare coverage (Medical, Vision and Dental insurance) Health Savings Account and Flexible Spending Account Retirement Plans including company match Employee Stock Purchase Program Wellness programs, including access to mental health, 1:1 financial planners, and a monthly wellness allowance Paid parental and caregiving leave Paid time off (including 12 paid holidays) Paid sick leave (1 hour per 26 hours worked (max 80 hours per calendar year to the extent legally permissible) for non-exempt employees and covered by our Flexible Time Off policy for exempt employees) Learning and Development resources Paid Life insurance, AD&D, and disability benefits These benefits are further detailed in Block's policies. This role is also eligible to participate in Block's equity plan subject to the terms of the applicable plans and policies, and may be eligible for a sign-on bonus. Sales roles may be eligible to participate in a commission plan subject to the terms of the applicable plans and policies. Pay and benefits are subject to change at any time, consistent with the terms of any applicable compensation or benefit plans.

Block is one company built from many blocks, all united by the same purpose of economic empowerment. The blocks that form our foundational teams - People, Finance, Counsel, Hardware, Information Security, Platform Infrastructure Engineering, and more - provide support and guidance at the corporate level. They work across business groups and around the globe, spanning time zones and disciplines to develop inclusive People policies, forecast finances, give legal counsel, safeguard systems, nurture new initiatives, and more. Every challenge creates possibilities, and we need different perspectives to see them all. Bring yours to Block. The Role Block uses Machine Learning and AI across many of its products and domains. For ML practitioners Block-wide, the ML Inference & Training team provides critical infrastructure, platforms, and libraries required to develop, productionize, and observe ML models. We are an established team of 13 engineers and 1 manager across a few countries and timezones, sitting within the ML & Data Platform organization. Our projects cover extending mature platforms (e.g online ML hosting/inference, internal python SDKs) as well as greenfield initiatives such as LLM hosting/monitoring, rearchitecting our training stack, or building out new tooling for large-scale offline evaluations. We are looking for an enthusiastic and experienced Machine Learning Engineer to join our team and help us build out the best ML infrastructure possible. In this role, you'll work closely with applied ML teams across Block to understand their challenges - scoping and exploring opportunities to improve their ability to deliver novel ML solutions at scale. You'll work on high-visibility, meaningful projects that can have a significant impact on Block's continued success with ML, influencing our roadmap and working across the ML Lifecycle. We welcome individuals who are passionate about building for the real world, embracing pragmatic approaches, and seeing challenges from fresh, nontraditional viewpoints. You Will Develop scalable ML/AI systems and platforms Be on the cutting edge of advancements in ML/AI across the industry Collaborate across diverse teams to deliver impactful platform solutions by understanding and generalizing the problems of cross-functional stakeholders Support critical ML systems used for fraud detection, language models, recommendation systems and underwriting Influence our roadmap and ensure we're working on the highest impact problems within the ML infrastructure domain You Have 8+ years of experience in software development and/or machine learning experience with a focus on internal platforms or infrastructure Deep understanding of architectures for ML-backed solutions and the ML lifecycle - from data gathering, training, model evaluation, MLOps, and productionizing models (both classical ML and deep learning/LLMs) A desire to understand our clients' needs in order to design tools and systems that solve our customer's problems. As a platform team, our main customers are internal developers and products Ability to produce production-quality code and services incorporating testing, evaluation, monitoring as well as the ability to quickly adapt to a new domain, hack MVP's, and iterate to improve product Experience using any of the major cloud vendors for high scale production use cases Strong communication skills (verbal and written) with technical and non-technical stakeholders Technologies We Use and Teach We value general and versatile engineering skill over specific experience with our current stack, but some examples: Golang, Python, TypeScript, React gRPC, Protocol Buffers AWS (Sagemaker, EC2, EKS), Databricks NVIDIA Triton, vLLM, ONNX We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class. We will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and "fair chance" ordinances. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build a workplace that is fair and square? Check out our I+D page. While there is no specific deadline to apply for this role, U.S. roles are typically open for an average of 55 days before being filled by a successful candidate. Please refer to the date listed at the top of this job page for when this role was first posted.

TIDAL was founded for artists by artists as the next innovative streaming platform to bring value back to the music industry. We empower artists with the products, resources, services, and content required to take control of their careers and connect more deeply with fans. Available in over 60+ countries, TIDAL continues to help artists break down economic barriers to continue creating what's next in culture. TIDAL is part of Block, Inc. (NYSE: SQ), a global technology company with a focus on financial services. The Role The Personalization AI team uses AI/ML to directly support Tidal's mission to be the first consideration for an artist when they want to share their music. On the listener side, we algorithmically surface music artists have shared by creating playlists, making recommendations, and supporting advanced search. We collaborate closely with Design, Business and engineering teams across TIDAL and the rest of Block. We use a wide range of models including simple heuristics, embeddings, deep learning and large-language models. You Will Lead strategic initiatives in Personalization & AI Engineering, driving the vision, architecture, and execution Develop new AI/ML systems that power Tidal's homepage including semantic search, recommendations, UX and playlists Build production systems that personalize the listener's experience Be a technical leader and establish quality practices that stick, make broader design decisions and set an example for others to follow Collaborate with a cross functional team of designers, business partners, and software engineers to build new technologies and features Design experiments, test them on production users, analyze and repeat You Have 12+ years building and operating quality software 5+ years of experience with recommender systems, ranking systems, or similar Led the development of complex models trained on large datasets powering customer facing features Strong software engineering skills Strong communication skills and customer empathy Experience with PyTorch, PySpark, Databricks and AWS is a plus We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class. We will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and "fair chance" ordinances. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build a workplace that is fair and square? Check out our I+D page. While there is no specific deadline to apply for this role, U.S. roles are typically open for an average of 55 days before being filled by a successful candidate. Please refer to the date listed at the top of this job page for when this role was first posted.

It all started with an idea at Block in 2013. Initially built to take the pain out of peer-to-peer payments, Cash App has gone from a simple product with a single purpose to a dynamic ecosystem, developing unique financial products, including Afterpay/Clearpay, to provide a better way to send, spend, invest, borrow and save to our 50+ million monthly active customers. We want to redefine the world's relationship with money to make it more relatable, instantly available, and universally accessible. Today, Cash App has thousands of employees working globally across office and remote locations, with a culture geared toward innovation, collaboration and impact. We've been a distributed team since day one, and many of our roles can be done remotely from the countries where Cash App operates. No matter the location, we tailor our experience to ensure our employees are creative, productive, and happy. The Role Machine Learning is an integral part of how we at Cash App design products, operate, and pursue our mission to serve the unbanked as well as disrupt traditional financial institutions. Our massive scale and deep trove of transaction data create an endless number of opportunities to use ML and AI methods to better understand our customers and offer new products and experiences that can improve their lives. We are a highly creative group that prefers to solve problems from first principles; we move quickly, make incremental changes, and deploy to production every day. As part of the Risk ML team, you will help shape the future of teen banking by developing models that enable safe and trustworthy financial experiences for teens and their parents. Your work will focus on building machine learning systems that detect and prevent risky or abusive activity, strengthen account integrity, and ensure a secure ecosystem for families on Cash App. You'll experiment with state-of-the-art algorithms to identify emerging risk behaviors, detect potential abuse in real time, and help ensure that millions of customers can use Cash App safely and confidently. You Will Build machine learning models to detect and act against risky or abusive activity across the Cash Families product Collaborate cross-functionally with engineering, product, and operations teams to design systems and features to protect and maintain trust with our customers Work closely with the ML Engineering teams who build the systems that allow our models to operate at scale and in real time Research emerging risks and behavioral patterns in financial activity to proactively shape safeguards and policy Contribute to the growth of our modelling capabilities through mentoring and supporting fellow modellers Exercise a high level of autonomy and responsibility, owning your solutions from design through to operation You Have Bachelor's degree in a quantitative field such as Mathematics/Statistics/Physics or Machine Learning. Masters or PhD preferred 5+ years of experience in machine learning, artificial intelligence, or a related field Strong knowledge of machine learning algorithms and data analysis techniques Excellent problem-solving skills and attention to detail Strong communication skills, with the ability to explain complex concepts to non-technical stakeholders Technologies We Use and Teach Python (NumPy, Pandas, sklearn, xgboost, TensorFlow, keras, etc.) MySQL, Snowflake, Tableau, Mode GCP/AWS We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class. We will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and "fair chance" ordinances. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build a workplace that is fair and square? Check out our I+D page. While there is no specific deadline to apply for this role, U.S. roles are typically open for an average of 55 days before being filled by a successful candidate. Please refer to the date listed at the top of this job page for when this role was first posted.

Block is one company built from many blocks, all united by the same purpose of economic empowerment. The blocks that form our foundational teams - People, Finance, Counsel, Hardware, Information Security, Platform Infrastructure Engineering, and more - provide support and guidance at the corporate level. They work across business groups and around the globe, spanning time zones and disciplines to develop inclusive People policies, forecast finances, give legal counsel, safeguard systems, nurture new initiatives, and more. Every challenge creates possibilities, and we need different perspectives to see them all. Bring yours to Block. The Role The AI Engineering Tools team accelerates engineering velocity by integrating AI throughout the software development lifecycle. We're redefining how engineers build software by making development faster, more creative, and more reliable through intelligent, AI-driven tooling. Our mission is to help every engineer at Block leverage AI effectively, safely, and efficiently. We're looking for an experienced software engineer to help advance the next generation of AI-assisted development at Block. In this role, you'll work across AI infrastructure and developer tooling to build and optimize coding agents that empower engineers company-wide. You'll collaborate with platform and product teams to refine user experiences, introduce new capabilities, and improve the performance of coding agents. This is a unique opportunity to shape how AI transforms engineering itself. You'll work on projects that continuously improve AI coding agents across all Block repositories, enhancing their ability to understand context, complete tasks, and assist with real-world development workflows. You Will Design and build AI-driven developer tools that integrate seamlessly into the software development lifecycle (e.g., intelligent code assistance, inline reviews, or automated refactoring systems). Partner with vendors and internal teams to evaluate, integrate, and optimize AI engineering tools. Collaborate with engineering leaders across Block to identify opportunities for AI integration that improve developer velocity and code quality. Mentor engineers, contribute to design and code reviews, and help establish best practices for building reliable AI systems at scale. You Have 12+ years of experience building and shipping production systems. Strong software engineering background, with fluency in designing scalable backend systems. Deep understanding of LLMs, prompt engineering, and applied ML workflows from experimentation and evaluation to deployment and monitoring. Experience integrating third-party AI models (e.g., OpenAI, Anthropic, or custom fine-tuned models) into real-world tools or services. A pragmatic approach to experimentation and iteration, balancing innovation with reliability and security. Strong communication and cross-functional collaboration skills, especially with engineers, product managers, and leadership. Familiarity with developer ecosystems, IDEs, or productivity platforms is a plus (e.g., VS Code, Cursor, GitHub Copilot, etc.). You'll help define how thousands of engineers across Block leverage AI to write better code, faster. Your work will shape the foundation for the next generation of developer productivity - one where AI is a trusted collaborator that elevates creativity, accelerates delivery, and improves software quality at scale. We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class. We will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and “fair chance” ordinances. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build a workplace that is fair and square? Check out our I+D page. While there is no specific deadline to apply for this role, U.S. roles are typically open for an average of 55 days before being filled by a successful candidate. Please refer to the date listed at the top of this job page for when this role was first posted. Block takes a market-based approach to pay, and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate's starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future. To find a location's zone designation, please refer to this resource. If a location of interest is not listed, please speak with a recruiter for additional information. Zone A:$276,800-$415,200 USDZone B: $276,800-$415,200 USDZone C:$276,800-$415,200 USDZone D:$276,800-$415,200 USD Use of AI in Our Hiring Process We may use automated AI tools to evaluate job applications for efficiency and consistency. These tools comply with local regulations, including bias audits, and we handle all personal data in accordance with state and local privacy laws. Contact us at privacy@block.xyz with hiring practice or data usage questions. Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want. Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering. Check out our other benefits at Block. Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we're helping build a financial system that is open to everyone. Privacy Policy

TIDAL was founded for artists by artists as the next innovative streaming platform to bring value back to the music industry. We empower artists with the products, resources, services, and content required to take control of their careers and connect more deeply with fans. Available in over 60+ countries, TIDAL continues to help artists break down economic barriers to continue creating what's next in culture. TIDAL is part of Block, Inc. (NYSE: SQ), a global technology company with a focus on financial services. The Role At TIDAL, a global music streaming platform owned by Block, we are committed to empowering artists and delivering unparalleled music experiences to fans. We are looking for an iOS Engineer who thrives in product development and is passionate about making a real difference in the music industry. You'll join our mobile team, a highly collaborative group of iOS and Android engineers, working closely with product, design, and backend teams in cross-functional sprints. This role is perfect for someone who combines deep technical expertise with a love for building impactful features that reach millions of users. If you're a high-capacity mobile engineer who enjoys applying AI-powered tools to move fast and deliver quality, we'd love to meet you. You Will Propose, define, and lead large, high-impact technical initiatives that affect multiple teams across TIDAL and Block Drive the architectural evolution of our iOS system, ensuring scalability, performance, and long-term success Define ways to accelerate yourself, others, and the organization through the use of AI technologies Collaborate with Android engineers and backend developers to deliver innovative solutions that provides real value for music fans and empowers artists Participate in design and product discussions, shaping the future of TIDAL's mobile experience Mentor and elevate teammates through thoughtful feedback, technical guidance, and pair programming Represent TIDAL in broader technical discussions with senior engineers and leaders across Block You Have Bachelor's degree in Computer Science or equivalent practical experience, plus ~12 years of relevant industry experience Deep technical expertise in iOS development with a track record of organizational impact Experience successfully leading and delivering large-scale technical initiatives across multiple teams Experience leveraging AI-assisted development tools in your workflow A commitment to continuous improvement for yourself, your team, and our codebase Proven ability to influence technical direction across organizational boundaries. Demonstrated excellence in technical communication and relationship-building across disciplines Experience mentoring and growing other engineers Passion for music and creating tools that support artists and fans Technologies We Use and Teach Languages: Swift, Objective-C, Kotlin (we collaborate closely with our Android counterparts!) Frameworks: SwiftUI, UIKit, SQLite, Accessibility, AVFoundation, Core Data Testing: Unit tests, UI tests, integration tests AI Tools: Goose, Cursor, Claude Code for accelerated and high-quality development Others: CI/CD pipelines, feature flagging, and modern development practices We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class. We will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and “fair chance” ordinances. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build a workplace that is fair and square? Check out our I+D page. Block takes a market-based approach to pay, and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate's starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future. To find a location's zone designation, please refer to this resource. If a location of interest is not listed, please speak with a recruiter for additional information. Zone A:$263,600-$395,400 USDZone B: $263,600-$395,400 USDZone C:$263,600-$395,400 USDZone D:$263,600-$395,400 USD Use of AI in Our Hiring Process We may use automated AI tools to evaluate job applications for efficiency and consistency. These tools comply with local regulations, including bias audits, and we handle all personal data in accordance with state and local privacy laws. Contact us here with hiring practice or data usage questions. Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want. Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering. Check out our other benefits at Block. Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we're helping build a financial system that is open to everyone. Privacy Policy

The Role At Block, we're building the foundation for a new generation of design intelligence. Systems and tools that help people turn ideas into real, usable products with greater clarity, speed, and confidence. This work sits at the intersection of design, engineering, and AI, and its purpose is simple: make high-quality craft more accessible, more collaborative, and more scalable across teams. Our focus is on translating design intent into flexible, programmable systems where tools and agents support exploration, improve everyday workflows, and unlock new creative possibilities. We believe advanced design capability shouldn't be limited to specialists or gated tools; it should be something more people can participate in, learn from, and build on together. We treat AI as a core part of the creative process, not an add-on. People on this team are curious about how new technologies reshape the way work gets done, and they explore those shifts thoughtfully-balancing experimentation with care for users, teams, and long-term impact. We value clear thinking, systems awareness, and a collaborative approach to problem-solving, where progress comes from shared momentum rather than individual heroics. This role is well-suited for builders who enjoy learning in motion, experimenting responsibly, and shaping new design × AI patterns that can grow across Block over time. You Will Design, build, and evolve AI-assisted tools that support designers and developers in their everyday work. Translate design intent and brand expression into flexible, programmable systems and agents. Prototype and explore new interface patterns, including generative, agent-driven, and multimodal experiences. Build extensible infrastructure-such as plugins, automation tools, and workflows-that can be adopted and adapted by many teams. Work closely with design and engineering partners to shape how design, engineering, and AI come together at Block. You Have We don't expect a perfect background or a single “right” path. We're interested in people who have built things, learned deeply, and kept going especially when the path wasn't straightforward. You may bring this experience through some combination of: Experience shipping software or tools that solve real problems, in professional, academic, or independent settings. Hands-on work in design engineering, design systems, creative tooling, or related hybrid roles. Comfort working with modern front-end technologies. Exposure to AI or ML systems such as working with APIs, LLMs, or agent-based tools at any depth. Familiarity with UI and product workflow tools used by designers and engineers. Examples of building tools or systems that help other people create, move faster, or work better together. If you also have experience in any of the areas below, that's a bonus: Collaborating with creative partners such as art directors, motion designers, audio designers, or illustrators. Open-source, generative, automation-driven, or agentic projects. Exploring multimodal interfaces like voice, vision, gesture, or AI-driven interactions. Building for mobile platforms, including iOS, using modern development practices. We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is a proud equal opportunity employer. We work hard to evaluate all employees and job applicants consistently, based solely on the core competencies required of the role at hand, and without regard to any legally protected class. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build an inclusive workplace? Check out our Inclusion & Diversity page Full-time employee benefits include the following: Healthcare coverage (Medical, Vision and Dental insurance) Health Savings Account and Flexible Spending Account Retirement Plans including company match Employee Stock Purchase Program Wellness programs, including access to mental health, 1:1 financial planners, and a monthly wellness allowance Paid parental and caregiving leave Paid time off (including 12 paid holidays) Paid sick leave (1 hour per 26 hours worked (max 80 hours per calendar year to the extent legally permissible) for non-exempt employees and covered by our Flexible Time Off policy for exempt employees) Learning and Development resources Paid Life insurance, AD&D, and disability benefits These benefits are further detailed in Block's policies. This role is also eligible to participate in Block's equity plan subject to the terms of the applicable plans and policies, and may be eligible for a sign-on bonus. Sales roles may be eligible to participate in a commission plan subject to the terms of the applicable plans and policies. Pay and benefits are subject to change at any time, consistent with the terms of any applicable compensation or benefit plans. Block takes a market-based approach to pay, and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate's starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future. To find a location's zone designation, please refer to this resource. If a location of interest is not listed, please speak with a recruiter for additional information. Zone A:$217,800-$326,800 USDZone B: $207,000-$310,400 USDZone C:$196,100-$294,100 USDZone D:$185,200-$277,800 USD Use of AI in Our Hiring Process We may use automated AI tools to evaluate job applications for efficiency and consistency. These tools comply with local regulations, including bias audits, and we handle all personal data in accordance with state and local privacy laws. Contact us here with hiring practice or data usage questions. Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want. Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering. Check out our other benefits at Block. Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we're helping build a financial system that is open to everyone. Privacy Policy

Block is one company built from many blocks, all united by the same purpose of economic empowerment. The blocks that form our foundational teams - People, Finance, Counsel, Hardware, Information Security, Platform Infrastructure Engineering, and more - provide support and guidance at the corporate level. They work across business groups and around the globe, spanning time zones and disciplines to develop inclusive People policies, forecast finances, give legal counsel, safeguard systems, nurture new initiatives, and more. Every challenge creates possibilities, and we need different perspectives to see them all. Bring yours to Block. The Role Block is organized into business groups, each with dedicated product and engineering teams. Our team plays a vital role in supporting these groups by delivering AI-powered solutions that directly benefit our customers and drive business growth. We are committed to building impactful products that solve meaningful problems, leveraging AI to create practical value across the company with direct impact to topline company revenue. We are looking for an enthusiastic and experienced Machine Learning Engineer to join our team to build AI products. In this role, you will collaborate closely with teams across Block to understand their challenges and opportunities. You'll have the opportunity to work across the full development stack and set product strategy. You'll design, develop, and launch AI-driven tools and applications that address real customer needs, working in an environment that values creativity, experimentation, and practical problem solving. You will partner with internal and external stakeholders to deliver highly visible solutions, staying at the forefront of AI advancements to ensure our products remain innovative and effective. As a trusted advisor, you'll help guide teams in harnessing AI, identifying new possibilities, and driving product direction that leads to lasting impact. This is a unique opportunity to become a leading expert in AI at Block. You'll work on projects that transform the way we build products and serve our customers. We welcome individuals who are passionate about building for the real world, embracing pragmatic approaches, and seeing challenges from fresh, nontraditional viewpoints. You Will Leverage AI to automate workflows and deliver new AI-powered product experiences Develop scalable AI systems and platforms Collaborate across diverse teams to develop AI solutions by understanding and generalizing the problems of cross-functional stakeholders Lead AI innovation by building and open sourcing advanced frameworks and tools to enhance workflows and set industry standards Drive alignment with Block's AI strategy by acting as a company AI expert and educating other teams about how to apply cutting-edge AI to their domains Support the adoption of AI best practices across the company by providing guidance and sharing expertise You Have 12+ years of experience in training and deploying ML models, developing ML software, and shipping customer-facing ML products. Deep understanding of modern ML techniques (e.g. Large Language Models) and the ML lifecycle from data gathering, training, model evaluation, MLOps, and productionizing models. Ruthless pragmatism when solving new and unconventional problems A desire to understand our clients' needs in order to design tools and systems that solve our customer's problems. As a platform team, our main customers are internal developers and products. Ability to produce production-quality code and services incorporating testing, evaluation, monitoring as well as the ability to quickly adapt to a new domain, hack MVP's, and iterate to improve product. Experience using any of the major cloud vendors for high scale production use cases Strong communication skills (verbal and written) with technical and non-technical stakeholders. We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class. We will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and "fair chance" ordinances. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build a workplace that is fair and square? Check out our I+D page. While there is no specific deadline to apply for this role, U.S. roles are typically open for an average of 55 days before being filled by a successful candidate. Please refer to the date listed at the top of this job page for when this role was first posted.