Software test engineer jobs in California

Software Development Engineer in Test (SDET) Active US Security Clearance required Are you the kind of engineer who loves breaking things so the system becomes stronger? If you enjoy pushing distributed systems to their limits and building automation that mirrors real world behaviors, this role will be right up your street. A fast growing space technology company is searching for an SDET to help test, validate, and stress their mission critical software. You will work on technology that powers satellite operations, command and control services, and large scale real time behaviours. You do not need to be a space expert. If you love Python, automation, and solving complex problems, you will thrive here. What you will be doing • Building and automating tests that mirror real customer use cases • Simulating hundreds to thousands of satellites running operations • Acting as a chaos tester to uncover weaknesses and improve system resilience • Troubleshooting and fixing bugs across deployed backend systems • Testing APIs, databases, event driven architectures, and containerized environments • Supporting CI and automation within modern DevOps pipelines • Working closely with frontend, backend, and product teams to ensure quality at scale What you will need • Proficiency in Python • Experience with Playwright, Cypress, or similar end to end testing frameworks • Strong understanding of containerized and serverless architectures • Skilled in API testing and distributed databases • Experience building CI or automation pipelines, ideally with GitHub Actions • A track record of solving technical problems with minimal oversight • Active US Security Clearance (Secret required, TS or TS SCI preferred) • Must meet ITAR requirements (US citizen, US national, green card holder) What you will get • Hybrid work, two days per week on site with flexibility • Comprehensive health insurance with full coverage for employees • Unlimited PTO with a requirement to take at least 15 days • Most US federal holidays observed • Quarterly wellness benefits • 4 percent 401(k) matching • Quarterly offsites in great destinations • A team that values ownership, curiosity, and continuous improvement If you are excited by the idea of testing systems at scale and helping shape the future of satellite operations, I would love to speak with you. Feel free to reach out to Ciara Holmes at EVONA for more information or to apply directly.

Requirements Support Client's FENX testing and installation effort, Execute pre-built TestRail test cases and validate software/hardware integration. Perform device configuration, firmware loading, and onsite hardware verification. Identify, document, and retest defects in collaboration with engineering. Provide daily execution summaries and phase-end test reports. Support installation punch lists, network validation, and device readiness checks. Card-Based Processing Onboarding and training on faregate devices. Executing test cases for card-based processing. Compiling test results and generating detailed TestRail test reports. Post-launch testing for bugs/issues identified during the pilot. Open Payment Processing + Fare Detection System Executing test cases for open-payment processing workflows. Compiling test results and generating detailed TestRail test reports. Post-launch testing for bugs/issues identified during Phase 2 pilot. Core Tech Stack AFC & Fare Collection Systems Cubic FENX, NextCity, validators, gates, TVMs. Fare device firmware tools & diagnostic utilities. Back-office transaction systems, API logs, and device communication protocols. Testing & QA Tools TestRail (required). Jira, Azure DevOps, or ServiceNow for defect management. Confluence for documentation. Git/GitHub/Bitbucket (for configuration review as needed). Hardware & Network Tools Linux/Windows diagnostics. Wireshark / packet capture utilities. Serial/Ethernet communication validation. OEM device provisioning tools. Multimeters and electrical verification tools. Required Skill Set Experience in testing and validating fare-collection systems (Cubic preferred). Strong functional, regression, and integration testing ability. Hands-on experience with faregates and payment-processing workflows. Firmware loading, device configuration, and hardware validation. Low-voltage installation familiarity (Cat5/6, power, grounding). Ability to read installation diagrams and diagnose field issues. Strong documentation and reporting discipline. Experience in transit, AFC, or industrial technical environments Daily execution status summaries. Defect logs with detailed reproduction steps and retest confirmations. Installation punch list and hardware verification checklist. Final Test Completion Summary Report per phase.

We are seeking a detail-oriented and proactive Testing Engineer I to join our Quality Engineering team. In this role, you will collaborate with clients' test engineering teams to design test plans, develop test cases, execute manual tests, and identify/report defects. The ideal candidate should have strong analytical skills, excellent communication abilities, and a passion for delivering high-quality products. Key Responsibilities Collaborate with client test engineering teams to: Develop comprehensive test plans for various components. Create detailed and accurate test cases. Execute manual testing across multiple platforms and environments. Identify, document, and report bugs/defects using standard tools. Perform a wide range of testing activities, including: Camera & Photography Testing Back-end Testing Black Box Testing Carrier Testing Cross-Browser / Cross-Platform Testing Compatibility Testing Documentation Testing Compliance Testing Exploratory Testing Accessibility Testing Functional Testing API / Services Testing Integration Testing Device Testing Regression Testing Globalization / Localization / Language Testing User Acceptance Testing (UAT) Mobile Application Testing System Testing Manual Testing Analyze customer scenarios to ensure comprehensive test coverage. Maintain accurate test documentation, logs, and reports. Collaborate with developers, product managers, and stakeholders during defect triage and issue resolution. Requirements 0-2 years of experience in Software Testing or Quality Assurance. Hands-on experience working with Unix/Linux or Windows environments. Strong understanding of manual testing concepts, test design, and bug reporting. Working knowledge of test automation tools (Selenium, Appium, or similar) is an added advantage. Excellent analytical skills with the ability to think through customer usage scenarios. Strong written and verbal communication skills. Detail-oriented, organized, and able to work in a fast-paced environment. Preferred Skills (Nice to Have) Basic scripting skills (Python, Shell, JavaScript, or similar). Familiarity with API testing tools such as Postman or Swagger. Exposure to automation frameworks or CI/CD pipelines.

Must Have skills: Solid understanding of SONiC fundamentals, building SONiC foundations, test architecture Some experience setting up servers with SONiC built on them Network Protocols - Layer 2 and platform protocols PyTest automation Critical skills: Solid understanding of SONiC fundamentals, building SONiC foundations, test architecture Some experience setting up servers with SONiC built on them Network Protocols - Layer 2 and platform protocols PyTest automation Desirable skills: PTF/SpyTest

Bachelor's degree in Computer Science, Information Technology, Engineering, or related field (or equivalent professional experience). 3+ years of experience in Testing, software implementation, consulting, or technical support roles, preferably in the financial crime, AML, fraud, or risk management domain. Develop and execute system and user acceptance test (UAT) plans, troubleshoot issues, and support as needed.

HCLTech is looking for a highly talented and self- motivated [911 PSAP Test Engineer role at San Ramon, CA] to join it in advancing the technological world through innovation and creativity. Job ID: 1623679BR Position Type: Full-time Location: San Ramon, CA (onsite) Responsibilities In accordance with relevant standards and interoperability of Next Generation 911 systems and associated components. Testing is critical to assuring effective emergency-response communications, ensure policies, procedures, and best practices for telephony systems are being met throughout the implementation of the 9-1-1 system. Required Skills, Knowledge and Experience Knowledge of wireline, wireless, VOIP and other communications technology Windows desktop and server Windows 10 Windows Server 2012 or higher Network protocols SIP/RTP, TCP/IP, UDP, DHCP System integration and testing Strong written and verbal communication skills Working knowledge of computers and electronic data processing; working knowledge of modern office practices and procedures Flexibility to work in a dynamic environment with shifting priorities with attention to detail. Desirable Skills, Knowledge and Experience Technical Knowledge of 911 Emergency Call Handling systems, (Cloud & Legacy) related Equipment, Network and Telephony architecture strongly preferred. i.e. Intrado Viper Motorola Vesta Carbyne APEX Cloud applications and knowledge or experience with firewalls (FortiGate), DNS, PKI, 4G/5G WAN (via CradlePoint), ESXi, Azure WAN, AWS Cloud WAN, and Terraform are beneficial. Hand-on experience in server room (racking, cabling) Test planning, test case development, execution, and reporting Telephony experience - T1s, PRI circuits, TDM Protocol analysis and troubleshooting, using Wireshark, Agilent, IRIS and/or other networking tools Performance, load, stability testing Experience with VMware NG911 and Emergency Services IP Network (ESINet) Job Responsibilities Test and certify 911 call handling applications (software, hardware) and GIS systems on Emergency Services IP Network (ESINet), a 911 call routing application. Testing New and Proof of concept e911 products or Networking functionality Testing and approving MOPs for field Site Technicians Develop and execute test plans, document defects and report test results. Work directly with call handling and ESInet suppliers to investigate, provide root cause analyses and resolve issues. Track open defects to resolution. Server Room Maintenance - To include Vendor CPE & ATT Network equipment. Ability to locate termination endpoint and installation of cabling of new servers' routers and associated network equipment. Staging of New 911 CPE equipment Pay and Benefits Pay Range Minimum: $90,000/ year Pay Range Maximum: $100,000/ year HCLTech is an equal opportunity employer, committed to providing equal employment opportunities to all applicants and employees regardless of race, religion, sex, color, age, national origin, pregnancy, sexual orientation, physical disability or genetic information, military or veteran status, or any other protected classification, in accordance with federal, state, and/or local law. Should any applicant have concerns about discrimination in the hiring process, they should provide a detailed report of those concerns to ****************** for investigation. A candidate's pay within the range will depend on their skills, experience, education, and other factors permitted by law. This role may also be eligible for performance-based bonuses subject to company policies. In addition, this role is eligible for the following benefits subject to company policies: medical, dental, vision, pharmacy, life, accidental death & dismemberment, and disability insurance; employee assistance program; 401(k) retirement plan; 10 days of paid time off per year (some positions are eligible for need-based leave with no designated number of leave days per year); and 10 paid holidays per year How You'll Grow At HCLTech, we offer continuous opportunities for you to find your spark and grow with us. We want you to be happy and satisfied with your role and to really learn what type of work sparks your brilliance the best. Throughout your time with us, we offer transparent communication with senior-level employees, learning and career development programs at every level, and opportunities to experiment in different roles or even pivot industries. We believe that you should be in control of your career with unlimited opportunities to find the role that fits you best.

Our client is building the world's fastest-growing marketplace for elite creative talent. We connect award-winning artists, directors, musicians, animators, and designers with frontier AI labs developing the next generation of multimodal systems including models like Sora, Suno, Runway, and Grok Imagine. This role is paying up to $300k salary base with 2% equity in top. Must have AI/LLM/Multimodal experience. Fully onsite role. We are a small, high-talent-density team from Stanford and Mercor, backed by: The Co-Founder of xAI The Founder of Periodic Labs Researchers from OpenAI's Sora team DeepMind alignment & evaluation leads Senior researchers from Salesforce AI, Meta, Google, and Anthropic Role Overview As a Founding Engineer, you will own core product surfaces, architecture, and infrastructure for the platform. You'll help shape engineering culture, drive rapid product iteration, and work directly with founders to build the marketplace and data systems powering the next wave of multimodal AI innovation. This role is ideal for someone who thrives in high-agency environments, ships quickly, and enjoys solving end-to-end problems across the stack. What You Will Build Marketplace & Talent Systems Onboarding flows for elite creative talent AI-assisted interviews and evaluations Self-serve matching tools between talent and AI labs Payment, billing, and workflow automation Data & Infrastructure Products Tools for frontier AI labs to support training and evaluation Internal platforms for data quality, annotation, and performance insights Product & Engineering Leadership Shape engineering culture, processes, and best practices Ship fast across greenfield projects with high ownership Influence product direction through tight feedback cycles with founders and users What We're Looking For Strong proficiency with Python, React, and TypeScript Experience with AWS, Docker, CI/CD, and modern infrastructure tooling Ability to operate independently and handle ambiguity in a fast-moving environment Interest in gamified platforms, creative tools, or marketplace dynamics Bias for action, strong communication skills, and a builder mentality

Software Engineer - AI Infra Startup - San Francisco, CA A small, deeply technical AI infra startup in San Francisco, building the platform that next-gen AI apps will run on - think custom compilers, CUDA kernels, and distributed orchestration are looking for a Software Engineer to join their team. What will I be doing? As a Software Engineer you'll help architect and build the infrastructure powering the next generation of AI systems. You'll work across the stack on: High-performance, distributed systems that support real-time AI workloads Kubernetes orchestration, infra tooling, and automation pipelines Low-level runtime components like custom compilers and CUDA kernels Scalable, reliable backend services Collaborating directly with the founding team on technical strategy and core architecture What are we looking for? Strong background in systems programming, backend, or infra engineering Experience with distributed systems, container orchestration, and Linux internals Comfortable working across multiple layers of the stack, from low-level code to infra ops Fast learner who thrives in ambiguous, high-agency environments Bonus: Experience with compilers, CUDA, or ML infrastructure What's in it for me: up to $300k base dependent on experience + 0.2-0.5% equity Work directly with deeply technical founders (ex-Stanford, Google, and more) on some of the hardest problems in AI infra On-site in San Francisco Stealth startup with serious backing, operating lean and hiring intentionally Apply now for immediate consideration!

Akkodis is seeking a - “Test Engineer I” for a Contract position with a client located Cupertino, CA. Pay Range: $40-$45/hr. (The rate/salary may be negotiable based on experience, education, geographic location, and other factors.). Job Summary The Video Engineering Image Quality (VEIQ) team is responsible for delivering world-class video quality across iPhone, iPad, Mac, and Vision Pro. We are seeking a highly skilled Camera Video Quality Engineer with strong experience in lab-based test automation and real-world video quality evaluation. In this role, you will help ensure our products deliver the best camera video experience in the world. Description In this position, you will conduct both laboratory and real-world video quality testing on iPhone and iPad, while benchmarking performance against competitive devices. You will play a key role on a fast-paced, collaborative team that thrives in a high-energy, dynamic environment. Your contributions will directly impact video quality across Apple products. Responsibilities include: Developing and executing camera video quality test models Capturing real-world video content for quality verification Identifying image quality (IQ) issues and performing initial analysis and triage Participating in IQ evaluations for new features and algorithms, providing actionable feedback to engineering teams Analyzing, reproducing, and isolating video quality issues across lab and real-world environments Minimum Qualifications BS in Image Science, Color Science, CS/CE/EE, or equivalent experience Experience with subjective and objective image quality evaluation Understanding of ISP pipelines and 3A (AE/AF/AWB) evaluation Strong attention to detail, analytical skills, and problem-solving abilities Ability to stay current on camera benchmarking results and testing methodologies Excellent written and verbal communication skills with a proven ability to collaborate cross-functionally Preferred Qualifications Proficiency in coding languages such as Python or C/C++ Strong video photography skills Equal Opportunity Employer/Veterans/Disabled Benefit offerings available for our associates include medical, dental, vision, life insurance, short-term disability, additional voluntary benefits, an EAP program, commuter benefits, and a 401K plan. Our benefit offerings provide employees the flexibility to choose the type of coverage that meets their individual needs. In addition, our associates may be eligible for paid leave including Paid Sick Leave or any other paid leave required by Federal, State, or local law, as well as Holiday pay where applicable. Disclaimer: These benefit offerings do not apply to client-recruited jobs and jobs that are direct hires to a client. To read our Candidate Privacy Information Statement, which explains how we will use your information, please visit ***************************************** The Company will consider qualified applicants with arrest and conviction records in accordance with federal, state, and local laws and/or security clearance requirements, including, as applicable: · The California Fair Chance Act · Los Angeles City Fair Chance Ordinance · Los Angeles County Fair Chance Ordinance for Employers · San Francisco Fair Chance Ordinance

Role: Founding Software Engineer Salary: $150k-$230k I am partnered with an early-stage start-up who is looking to hire a founding engineer to help build out their product, which is helping modernize and change the way procurement is done within the US government. The technology acts as a marketplace to connect companies with relevant opportunities and to streamline the process, which in turn will save time and money for both the government and potential suppliers. To be considered for this role you must have the following skills and background: Must be a US citizen due to the nature of the work Computer science degree from a top 30 university Have 1 year+ post-college work experience, or if you are a fresh grad, internship or demonstrable projects you have done yourself Experience with full-stack engineering - ideally have worked with Python and TypeScript Proven ability to design AI agents and harness LLMs for practical applications Working experience in an early-stage start-up is highly desirable and will make you stand out from the crowd If you want to know more about this position, please apply below and I will be in contact to discuss the position further.

A pioneering and well-funded AI company is seeking a talented Python Backend Engineer to build the core infrastructure for its revolutionary autonomous systems. This is a unique opportunity to join an innovative team at the forefront of engineering and artificial intelligence, creating a new category of software that will redefine how complex products in sectors like aerospace, automotive, and advanced manufacturing are designed and developed. Why Join? Build the Future of Engineering: This isn't just another backend role. Your work will directly shape how next-generation rockets, cars, and aircraft are designed, fundamentally changing the engineering landscape. Solve Unprecedented Technical Puzzles: Tackle unique challenges in building the infrastructure for autonomous AI agents, including simulation orchestration, multi-agent coordination, and scalable model serving. Shape a Foundational Platform: As a critical member of a pioneering team, you will have a significant impact on the technical direction and core architecture of an entirely new category of software. Join a High-Impact Team: Work in a collaborative, fast-paced environment where your expertise is valued, and you have end-to-end ownership of critical systems. Compensation & Location: Base salary of up to $210,000 + equity + benefits, while working on-site with the team in a modern office in downtown San Francisco. The Role As a Python Backend Engineer, you will be instrumental in constructing the infrastructure that underpins these autonomous engineering agents. Your responsibilities will span model serving, simulation orchestration, multi-agent coordination, and the development of robust, developer-facing APIs. This position is critical for delivering the fast, reliable, and scalable systems that professional engineers will trust and depend on in high-stakes production environments. You will: Own and build the core backend infrastructure for the autonomous AI agents, focusing on scalability, model serving, and multi-agent orchestration. Design and maintain robust APIs while integrating essential third-party tools like CAD software and simulation backends into the core platform. Develop backend services to process and serve complex 3D visualizations from simulation and geometric data. Collaborate across ML, frontend, and simulation teams to shape the product and engage directly with early customers to drive infrastructure needs. Make foundational architectural decisions that will define the technical future and scalability of the entire platform. The Essential Requirements Strong backend software engineering experience, with a primary focus on Python. Proven experience in designing, building, and maintaining production-level APIs (FastAPI preferred but Flask and Django also considered). Experience with 3D visualization libraries or tools such as PyVista, ParaView, or VTK. Excellent systems-thinking skills and the ability to reason about the interactions between compute, data, and models. Experience working in fast-paced environments where end-to-end ownership and proactivity are essential. Exceptional communication and collaboration abilities. What Will Make You Stand Out Experience integrating with scientific or engineering software (such as CAD, FEA, or CFD tools). Exposure to agent frameworks, workflow orchestration engines, or distributed systems. Familiarity with model serving frameworks (e.g., TorchServe, Triton) or simulation backends. Previous experience building developer-focused tools or working in high-trust, customer-facing technical roles. If you are interested in this role, please apply with your resume through this site. SEO Keywords for Search Python Backend Engineer, Python Software Engineer, Backend Engineer, Software Engineer, Python Developer, AI Engineer, Machine Learning Infrastructure, MLOps Engineer, Backend Software Engineer (Python), Senior Backend Engineer, AI/ML Engineer, Infrastructure Engineer, FastAPI Developer, PyVista, ParaView, VTK, 3D Visualization, Docker, Kubernetes, Cloud Engineer, AI Platform Engineer, Distributed Systems Engineer, Simulation Software Engineer, CAD Integration, CFD, FEA, Scientific Computing, High-Performance Computing (HPC), Agent Frameworks, Workflow Orchestration, Technical Lead, Staff Engineer. Disclaimer Attis Global Ltd is an equal opportunities employer. No terminology in this advert is intended to discriminate on any of the grounds protected by law, and all qualified applicants will receive consideration for employment without regard to age, sex, race, national origin, religion or belief, disability, pregnancy and maternity, marital status, political affiliation, socio-economic status, sexual orientation, gender, gender identity and expression, and/or gender reassignment. M/F/D/V. We operate as a staffing agency and employment business. More information can be found at attisglobal.com.

We are actively searching for a Founding Protocol Engineer to join our team on a permanent basis. In this position you will If you are someone that is impressed with what Hyperliquid has accomplished then this role is for you. We are on a mission to build next generation lending and debt protocols. We are open to both Senior level and Architect level candidates for this role. Your Rhythm: Drive the architecture, technical design, and implementation of our lending protocol. Collaborate closely with researchers to validate and test designs Collaborate with auditors and security engineers to ensure safety of the protocol Participate in code reviews, providing constructive feedback and ensuring adherence to established coding standards and best practices Your Vibe: 5+ years of professional software Engineering experience 3+ years of experience working in Solidity in EVM in production environments, specifically focused in DeFi products 2+ years of experience working with a modern backend languages (Go, Rust, Python, etc) in distributed architectures Experience building lending protocols in a smart contract language Open to collaborating onsite a few days a week at our downtown SF office Our Vibe: Relaxed work environment 100% paid top of the line health care benefits Full ownership, no micro management Strong equity package 401K Unlimited vacation An actual work/life balance, we aren't trying to run you into the ground. We have families and enjoy life too!

Robotics Software Engineer (Generalist/Full-Stack) Robotic Software Engineer - Humanoid Robotics Palo Alto, SF Bay Area (Full-time | Onsite) $180k-$200k + equity (flexible for exceptional candidates) We are recruiting building next-generation humanoid robotic systems that combine advanced AI with cutting-edge hardware. Our team moves fast, prototypes aggressively, and puts real robots into the world. We're now hiring a Robotic Software Engineer to help shape our core software stack and accelerate the development of our embodied AI systems. What You'll Work On As part of a small, high-impact engineering team, you will: Build and optimise robotics software in C++ and ROS2 Integrate perception, control, planning, and learning modules Work hands-on with robots to bring up new hardware and run real-world experiments Deploy reinforcement learning / imitation learning policies onto physical robots Develop middleware, interfaces, and tooling that connect AI → hardware Prototype behaviours across diverse robot types (arms, humanoids, mobile platforms, drones) This role directly supports both our AI and hardware teams and has significant ownership from day one. Must-haves: Strong C++ development skills (multi-threading, performance, systems-level) Professional experience with ROS2 Hands-on robotics experience - ideally robot learning on physical hardware Ability to work on real robots (debugging, integration, testing) Generalist mindset and comfort in a fast-paced startup environment Nice-to-haves: Manipulation or kinematics (humanoids, arms, quadrupeds) Controls for mobile robots or drones Sensor/actuator integration, drivers, or middleware experience VR prototyping (Meta Quest or similar) Experience across different robot embodiments Why Join Us Build software that runs on real humanoid robots immediately High ownership within a small, world-class engineering team Competitive compensation + meaningful equity Opportunity to influence architecture, roadmap, and product direction Work at one of the most exciting intersections in tech: AI × robotics

Founding Engineer $140K - $200K + equity San Francisco (Onsite Role) Direct Hire A fast growing early-stage start who recently secured a significant amount at Seed is actively hiring 3x software engineers to join their founding team. They're looking for people who are scrappy, move fast, challenge assumptions, and are driven to win. They build quickly and expect teammates to push boundaries. Who You Are Make quick, reversible (“two-way door”) decisions Proactively fix problems before being asked Comfortable working across a modern engineering stack (e.g., TypeScript, Python, containerisation, ML/LLM tooling, databases, cloud environments, mobile frameworks) Have built real, shipped products Thrive in ambiguity and fast-moving environments What You'll Do Talk directly with users to understand their workflows, pain points, and needs Architect systems that support large enterprise usage Build automated pipelines and intelligent agents that process and verify large volumes of data Maintain scalable, robust infrastructure Ship quickly - progress over perfection The Reality You'll work closely with the founding team and directly with customers User value beats hype, trends, and “cool tech” Expect a demanding, high-output culture If you're a Software Engineer with 2 + years' experience and want to work in a growing start-up, please do apply now for immediate consideration.

Role: Senior Software Engineer (Java) Contract: 12 to 24 months Skills Needed: Backend Java, API development, Microservices, Oracle, Splunk Client JD- We are seeking a Senior Software Engineer (SE3) with strong backend Java experience to support the development of APIs and microservices within a large-scale banking/transaction environment. The role involves modernizing monolithic applications, contributing to cloud migration (OCP), and ensuring platform stability, performance, and security. Key Responsibilities Design, develop, test, and support backend APIs and microservices. Work on modernization and cloud migration efforts. Ensure scalability, resiliency, and secure SDLC practices. Handle production support, monitoring, and issue resolution. Collaborate with product managers, architects, and engineering teams. Guide junior developers when needed. Required Skills 4+ years Java/Spring development 4+ years API/microservices experience 2+ years Oracle database experience Experience with Splunk or similar monitoring tools Agile/Scrum experience Nice to Have Experience decomposing monolithic apps Cloud/OCP migration experience Kafka or event-driven architecture API management tools (e.g., Apigee) Exposure to GenAI/Copilot (bonus) EEO: “Mindlance is an Equal Opportunity Employer and does not discriminate in employment based on - Minority/Gender/Disability/Religion/LGBTQI/Age/Veterans.”

We're a Series A and we need a systems-savvy engineer who can architect, optimize, and turbocharge our multi-target runtime from day one. If concurrent programming is your playground, C++14 is your native language, and you think in cache lines, pipelines, and memory hierarchies, this role puts you at the heart of the action. What You'll Do Design, build, and continually improve our multi-target runtime Apply cutting-edge parallelization + partitioning techniques to generate and exploit highly optimized kernels Rapidly prototype ideas and validate them with real data What You Bring Deep expertise in asynchronous + concurrent programming 4+ years of modern C/C++ Strong grasp of hardware architecture (scalar vs vector, memory hierarchies, etc.) Knowledge of OS kernel or hypervisor development Bonus Points CUDA/ROCm library experience GPU programming background HPC experience MS/PhD in CS or equivalent Familiarity with PyTorch, JAX, Triton Experience wrangling large compute clusters Why You'll Love It You'll own critical, performance-sensitive systems that sit at the core of our stack; shaping how next-gen ML models run across diverse hardware. High impact, deep tech, zero bureaucracy. If you want to engineer at the limits of performance and help build a runtime that changes the game let's talk!

I'm hiring an AI Product Engineer for a fast-growing AI start-up that's building agents to automate financial crime workflows. Their tech works like a real analyst inside a browser and internal tools, helping banks cut huge amounts of manual work and stop fraud more effectively. They're small, highly technical, and already seeing strong traction with major institutions. In this role, you'll work across the stack, build end-to-end features, shape new agent capabilities, and help ship production systems that have real impact for customers. We're looking for engineers who: Love building quickly and owning problems end to end Have experience with production systems or AI/ML workflows Communicate clearly and enjoy working with minimal process Want to push what's possible with AI agents in the real world Minimum Bachelor's degree in Computer Science (or adjacent) Their stack is Python, Node, React and Typescript (not a dealbreaker to be experienced with these!) Apply or reach out directly if you're interested!

Software Engineer, C++ Systems About the Role We're seeking a highly skilled Software Engineer (C++ Systems) to join our client's team and help build the core of our GPU virtualization platform. This role is ideal for engineers who thrive on microsecond-level performance optimization, enjoy working deep in complex C++ systems, and are motivated by building foundational infrastructure that directly impacts customers. You'll play a critical role in scaling our platform as we serve a rapidly growing customer base, owning production systems from day one and tackling technically demanding challenges at the forefront of GPU infrastructure. What You'll Do Optimize performance of our C++ GPU virtualization library at the systems level Research and develop solutions for GPU oversubscription, checkpointing, and distributed GPU clusters Support new hardware and software architectures with a deep, end-to-end understanding of the stack Debug low-level systems in production environments Diagnose and resolve performance issues in machine learning workloads Collaborate closely with the CTO on advanced systems design and implementation Required Experience Proven experience building and operating low-level systems in production environments Background working with compilers, kernels, or networking protocols Demonstrated ability to trace and resolve performance issues across complex systems Technical Skills Expert-level C++ proficiency (Rust experience is acceptable, though primary development will be in C++) Experience optimizing C++ and NIC performance Strong systems-level debugging and performance analysis skills Education Degree in Computer Science or a related field from a top-tier program Strong academic performance (3.7+ GPA) Soft Skills Ability to deliver high-quality output quickly in an early-stage startup environment Comfortable taking full ownership of critical production systems Thrives in ambiguous, high-impact problem spaces Company & Opportunity Building GPU virtualization software that dramatically improves GPU efficiency Operating a fast-growing GPU cloud, scaling from $0 to $500K in revenue in just six months Backed by Y Combinator and a recently closed $4.5M Seed round Join as employee #5 at a pivotal moment: product-market fit validated and scaling rapidly Work directly with the CTO on systems challenges few startups get to tackle This is a hardcore C++ systems role focused on GPU virtualization, performance tuning, production debugging, and advanced research Expect ownership, impact, and problems that demand top 0.1% technical skill Why This Role If you love squeezing performance out of low-level systems, enjoy working at the intersection of GPUs, distributed systems, and production infrastructure, and want to help scale a breakthrough platform at an early stage, this role offers a rare and exciting opportunity.

Subtle Medical is a leading provider of AI-powered imaging solutions, optimizing scan efficiency and image quality across radiology. Recognized by TIME as a World's Top Healthcare Company (2025) and multiple times as a CB Insights GenAI 50, Digital Health 150, and Top AI 100 company, Subtle Medical is committed to transforming medical imaging through responsible and intelligent software. The company's solutions are deployed on over 1000 scanners worldwide, helping imaging centers and hospitals deliver faster scans, improve image quality, and enhance patient care without the need for new hardware. The Role The Machine Learning Software Engineer role at Subtle Medical will join our growing AI team, working at the intersection of applied machine learning, infrastructure, and product innovation. Subtle Medical is the world leader in applying deep learning to the acquisition of medical images in order to enable faster, safer, and smarter medical imaging. We are committed to transforming the healthcare ecosystem by building and delivering responsible AI solutions that create a measurable impact on the radiology workflow and patient experience. Our vision is that every human being has the opportunity for a timely diagnosis, high-quality care, and a longer, healthier life. Currently, Subtle Medical has several FDA-cleared & CE-marked AI software products that are in clinical usage in over 900 hospitals and imaging centers worldwide. Subtle has a robust multi modality product portfolio and continues to invest heavily in research and development. Our team consists of world leading radiologists, scientists and engineers from top universities like Stanford, Harvard, and MIT many with past experience at leading equipment manufacturers like GE, Philips and Siemens. Subtle Medical has been recognized multiple times by CB Insights as a global Top 100 AI Company and Top 150 Digital Health Company. We continue to grow and expand and welcome those to apply who desire to empower patients and physicians with better healthcare. Subtle Medical is an equal employment opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, protected veteran status, or any other characteristic protected by law. Job Responsibilities Build software systems that enable AI-powered image enhancement and analysis algorithms in the clinical workflow Write computer code to set up deep learning network architecture Support and participate in applicable Quality Management System (QMS) processes for Subtle Medical AI/ML Software as a Medical Device (SaMD) products. Feed imaging data into this model for training and evaluating the results on a separate test set Participate in applicable data protection related activities, such as audits, investigations, and training, and comply with all applicable company policies and procedures. Deploy and maintain our software systems both on the cloud and at work sites Build and maintain CI/CD tools for our softwares Complete models and simulations, using manual or automated tools, to analyze or predict system performance under different operating conditions Monitor system operation to detect potential problems Identify system data, hardware, or software components required to meet user needs Maintain logs of any code modifications Conceive and document software design and testing plans Test performance of multiple deep learning models Improve the efficiency of deep learning algorithms to allow them to be run on standard hospital scanners Collaborate with the research team in developing next generation AI-powered medical imaging products Build and maintain experiment tracking tools Build and maintain model training, validation and deployment infrastructure Publication and other dissemination of new technologies Submit patent applications on significant new advances Qualifications Programming skills in Python/C/C++ Understanding of general principles of medical imaging and/or Deep Learning pipelines on medical images Working knowledge of Quality Management System (QMS) regulations and applicable familiarity with ISO 13485, ISO 14971, IEC 62304, and IEC 62366. Education Master's degree in Computer Science or relevant field Work Experience 5 years work experience in software engineering as a full stack developer and/or ML Ops Engineer Nice to Haves 5+ years work experience in software engineering for medical imaging Industry Computer Software / SAAS Medical Imaging/Radiology Hospital & Health Care Employment Type Full-time Location This is a remote role with potential for 5% travel. Travel is usually restricted to team meetings. Candidates in the San Francisco Bay Area are given the option to work hybrid at the Menlo Park office. Job Functions Engineering Want to apply? Please email ************************* with your resume/CV and the job title in the subject line. Be sure to include all applicable information that supports your qualification and interest in this role.