Security engineer jobs in California - 3,982 jobs

Vantor is forging the new frontier of spatial intelligence, helping decision makers and operators navigate what's happening now and shape what's coming next. Vantor is a place for problem solvers, changemakers, and go-getters-where people are working together to help our customers see the world differently, and in doing so, be seen differently. Come be part of a mission, not just a job, where you can: Shape your own future, build the next big thing, and change the world. To be eligible for this position, you must be a U.S. Person, defined as a U.S. citizen, permanent resident, Asylee, or Refugee. Note on Cleared Roles: If this position requires an active U.S. Government security clearance, applicants who do not currently hold the required clearance will not be eligible for consideration. Employment for cleared roles is contingent upon verification of clearance status. Export Control/ITAR: Certain roles may be subject to U.S. export control laws, requiring U.S. person status as defined by 8 U.S.C. 1324b(a)(3). Please review the job details below. Are you looking for an opportunity to combine your technical skills with big picture thinking to make an impact in the DoD? You understand your customer's environment and how to develop the right systems for their mission. Your ability to translate real-world needs into technical specifications makes you an integral part of delivering a customer focused engineering solution. At Vantor, you'll work with the U.S. Space Force as part of the effort to develop and rapidly deploy the next generation of resilient Missile Warning (MW), Tactical Intelligence, Surveillance, and Reconnaissance (TISR), and Environmental Monitoring (EM) capabilities to deter attacks and provide critical information to our warfighters to defeat our enemies in battle. Within this role, you will lead a Systems, Engineering, and Integration (SE&I) team to plan and execute SE&I processes for space programs, including requirements analysis, architecture design, integration, testing, verification, and transition. Plan and coordinate SE&I activities across the SE&I team and broader stakeholder community, including the Federally Funded Research and Developmental Centers (FFRDCs), development contractors, and external stakeholders. Grow your skills by researching new requirements, technologies, and threats and using innovative engineering methodologies and tools to create tomorrow's solutions. Join our team and create the future of Remote Sensing in the Space Force. Due to the nature of work performed within this facility, U.S. citizenship is required. Empower change with us. Build Your Career: When you join Vantor, you'll have the opportunity to connect with other professionals doing similar work across multiple markets. You'll share best practices and work through challenges as you gain experience and mentoring to develop your career. In addition, you will have access to a wealth of training resources through our Digital University, an online learning portal where you can access more than 5000 tech courses, certifications and books. Build your technical skills through hands-on training on the latest tools and tech from our in-house experts. Pursuing certifications? Take advantage of our tuition assistance, on-site courses, vendor relationships, and a network of experts who can give you helpful tips. We'll help you develop the career you want as you chart your own course for success. Qualifications: Secret clearance Bachelor's degree in a Science, Technology, Engineering, or Mathematics (STEM) field 10+ years of experience with performing SE&I tasks on a major DoD or IC space programs 5+ years of experience with leading a team performing SE&I on large-scale national security satellite programs Experience with leading a team for development of technical specifications, interface control documents, integration plans and schedules, and inter-service support agreements Knowledge of DoD 5000.01 and 5000.02 Ability to communicate and establish collaborative relationships with government clients, FFRDCs, and associate contractor teammates to achieve program goals Preferred Qualifications: Experience leading a team performing SE&I tasks on Space-Based Environmental Monitoring (SBEM) systems Experience leading a team using a Model-Based Systems Engineering approach to manage system definitions and technical baselines Knowledge of systems engineering standards, including IEEE 15288.1 and IEEE 15288.2 Knowledge of Agile Methodologies Ability to be highly motivated with a dynamic work ethic and demonstrate a strong desire to contribute to the DoD mission Ability to perform multiple systems engineering and program management functions in support of design reviews and requirements verification Ability to identify, analyze, and resolve technical risks and issues, develop technical reports, and collaborate with government and other stakeholders to implement recommended solutions TS/SCI clearance Master's degree in Engineering, Mathematics, Physics, or CS INCOSE Systems Engineering Professional Certification, including ASEP, CSEP, or ESEP Certification #cjpost #LI-CJ1 Pay Transparency: In support of pay transparency at Vantor, we disclose salary ranges on all U.S. job postings. The successful candidate's starting pay will fall within the salary range provided below and is determined based on job-related factors, including, but not limited to, the experience, qualifications, knowledge, skills, geographic work location, and market conditions. Candidates with the minimum necessary experience, qualifications, knowledge, and skillsets for the position should not expect to receive the upper end of the pay range. The base pay for this position within California, Colorado, Hawaii, New Jersey, the Washington, DC metropolitan area, and for all other states is: $137,000.00 - $229,000.00 Benefits: Vantor offers a competitive total rewards package that goes beyond the standard, including a robust 401(k) with company match, mental health resources, and unique perks like student loan repayment assistance, adoption reimbursement and pet insurance to support all aspects of your life. You can find more information on our benefits at: ****************************** The application window is three days from the date the job is posted and will remain posted until a qualified candidate has been identified for hire. If the job is reposted regardless of reason, it will remain posted three days from the date the job is reposted and will remain reposted until a qualified candidate has been identified for hire. The date of posting can be found on Vantor's Career page at the top of each job posting. To apply, submit your application via Vantor's Career page. EEO Policy: Vantor is an equal opportunity employer committed to an inclusive workplace. We believe in fostering an environment where all team members feel respected, valued, and encouraged to share their ideas. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, sex, gender identity, sexual orientation, disability, protected veteran status, age, or any other characteristic protected by law.

MANTECH seeks a motivated, career and customer-oriented Personnel Security Specialist II to join our team in El Segundo, CA. The Personnel Security Specialist's primary function is to handle personnel security functions in support of the customer's facility and organization. The position will provide “day-today” PERSEC services for Collateral, Sensitive Compartmented Information (SCI) and Special Access Program (SAP) activities. Responsibilities include but are not limited to: Build and Maintain tracking spreadsheets/databases for customer PERSEC activities. Provide support for the security awareness and education programs. Perform miscellaneous administrative support functions as directed by the contractor site lead and/or the Government Security Representative. Review, track, and monitor security clearance processing activities with appropriate government personnel to achieve appropriate clearance actions. Conduct Defense Central Index of Investigations (DCII), Joint Personnel Access System (JPAS), and SAPNP reviews of candidates being submitted for SAP access. Perform data entry and record checks in the Joint Access Database (JADE) and maintain all customer sponsored personnel access information. Receive and/or transmit classified visit requests as necessary to meet customer needs. Minimum Qualifications: Bachelor's degree; an additional 4 years of experience may be considered in lieu of degree. 6 + years of related experience. 4 + years of relevant SCI experience. Must be familiar with security policy/manuals and the appropriate ICDs/JAFANs/DOD Manuals and other guiding policy documents. Preferred Qualifications: 2+ years of SAP-related experience. Clearance Requirements: Current Top Secret Clearance with SCI Eligibility. Eligibility for access to Special Access Program Information. Willingness to submit to a polygraph. Physical Requirements: Must be able to remain in a stationary position 50%. Needs to occasionally move about inside the office to access file cabinets, office machinery, etc. Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer. Frequently communicates with co-workers, management and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations.

A technology company in San Francisco is seeking a candidate to integrate critical controls in their application. This role requires strong technical architecture skills, the ability to work cross-functionally, and a privacy-minded approach. Ideal candidates will have experience in security, fraud, or mobile development. Competitive salary and benefits are offered, ranging from $276,500 to $310,000. #J-18808-Ljbffr

is a technology company. We believe the camera presents the greatest opportunity to improve the way people live and communicate. Snap contributes to human progress by empowering people to express themselves, live in the moment, learn about the world, and have fun together. The Company's three core products are , a visual messaging app that enhances your relationships with friends, family, and the world; , an augmented reality platform that powers AR across Snapchat and other services; and its AR glasses, .teams build fun and technically sophisticated products that reach hundreds of millions of Snapchatters around the world, every day. We're deeply committed to the well-being of everyone in our global community, which is why are at the root of everything we do. We move fast, with precision, and always execute with privacy at the forefront.Snap Inc. is seeking a Security Engineer to join our Spam & Abuse team!What you'll do:* Architect and lead the development of scalable, innovative solutions to detect and mitigate spam & abuse threats, leveraging state-of-the-art technologies and methodologies.* Drive cross-functional initiatives by collaborating with engineering, product management, and operations teams to create robust, proactive defenses against spam, abuse, and account takeover.* Take ownership of high-impact, complex projects, from inception to deployment, ensuring alignment with Snap's technical and business objectives.* Lead incident response efforts for spam and abuse-related security events, establishing processes for continuous improvement.* Mentor and provide technical leadership to engineers across teams, fostering a culture of learning and growth.* Define and drive the technical strategy and roadmap for spam and abuse detection and prevention systems.Knowledge, Skills & Abilities:* Demonstrated leadership and impact in combating spam, abuse, or related security domains.* Expertise in software engineering, with proficiency in programming languages such as Golang and Python.* Strong background in big data technologies, such as BigQuery.* Proven ability to lead and execute large-scale technical initiatives across multiple teams.* Excellent cross-team collaboration, communication, and stakeholder management skills.* Deep understanding of user privacy, security, and ethical considerations in the context of abuse prevention.Minimum Qualifications:* Bachelor's degree in Computer Science, Engineering, Information Systems, or equivalent experience.* 6+ years of post-Bachelor's software development experience; or Master's degree in a technical field + 5+ year of post-grad software development experience; or PhD in a relevant technical field +2+ years of post-grad software development experience* Extensive experience designing and deploying production-quality software solutions at scale.* Proven track record in leading the development of systems to detect and mitigate spam, abuse, or other forms of malicious behavior.Preferred Qualifications:* Proven leadership in designing and deploying scalable systems for security operations, with measurable impact on organizational security goals.* Experience driving organizational change by developing and evangelizing new frameworks or processes for combating emerging threats.* Strong strategic thinking, with a demonstrated ability to define technical roadmaps and lead multi-team initiatives.* Experience collaborating with executive leadership to align technical solutions with business priorities and risk management strategies.* A track record of mentoring senior engineers, fostering a culture of technical excellence and innovation.If you have a disability or special need that requires accommodation, please don't be shy and provide us some ."Default Together" Policy at Snap: At Snap Inc. we believe that being together in person helps us build our culture faster, reinforce our values, and serve our community, customers and partners better through dynamic collaboration. To reflect this, we practice a “default together” approach and expect our team members to work in an office 4+ days per week. At Snap, we believe that having a team of diverse backgrounds and voices working together will enable us to create innovative products that improve the way people live and communicate. Snap is proud to be an equal opportunity employer, and committed to providing employment opportunities regardless of race, religious creed, color, national origin, ancestry, physical disability, mental disability, medical condition, genetic information, marital status, sex, gender, gender identity, gender expression, pregnancy, childbirth and breastfeeding, age, sexual orientation, military or veteran status, or any other protected classification, in accordance with applicable federal, state, and local laws. EOE, including disability/vets.We are an Equal Opportunity Employer and will consider qualified applicants with criminal histories in a manner consistent with applicable law (by example, the requirements of the San Francisco Fair Chance Ordinance and the Los Angeles Fair Chance Initiative for Hiring, where applicable).: Snap Inc. is its own community, so we've got your back! We do our best to make sure you and your loved ones have everything you need to be happy and healthy, on your own terms. Our benefits are built around your needs and include paid parental leave, comprehensive medical coverage, emotional and mental health support programs, and compensation packages that let you share in Snap's long-term success!CompensationIn the United States, work locations are assigned a pay zone which determines the salary range for the position. The successful candidate's starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. The starting pay may be negotiable within the salary range for the position.These pay zones may be modified in the future.:The base salary range for this position is $209,000-$313,000 annually.:The base salary range for this position is $199,000-$297,000 annually.:The base salary range for this position is $178,000-$266,000 annually.This position is eligible for equity in the form of RSUs. #J-18808-Ljbffr

At Skild AI, we are building the world's first general purpose robotic intelligence that is robust and adapts to unseen scenarios without failing. We believe massive scale through data-driven machine learning is the key to unlocking these capabilities for the widespread deployment of robots within society. Our team consists of individuals with varying levels of experience and backgrounds, from new graduates to domain experts. Relevant industry experience is important, but ultimately less so than your demonstrated abilities and attitude. We are looking for passionate individuals who are eager to explore uncharted waters and contribute to our innovative projects. Position Overview We are seeking a proficient Embedded Security Engineer to join our team and contribute to the protection of our models deployed on robotic hardware. You will be responsible for conducting comprehensive threat modeling and security assessments, as well as supporting our engineering teams in adhering to established security standards and requirements. This role involves both software engineering techniques and deep learning methods to encode/encrypt trained models. A blend of technical acumen and collaborative skills is essential, as you will develop solutions to identified risks, write test cases for security controls, and actively participate in offensive security assessments. Responsibilities Conduct detailed threat modeling and security assessments of critical assets. Regularly update threat models to reflect evolving threats and changes in the business environment. Identify and explore vulnerabilities in critical software components used across our environment. Create and implement technical solutions to mitigate identified risks, and maintain test cases to ensure the effectiveness and resilience of the solutions. Collaborate with engineering teams to ensure compliance with defined security standards and requirements. Provide support in the implementation of security measures. Lead penetration tests and red team exercises. Preferred Qualifications BS, MS or higher degree in Computer Science, Robotics, Engineering or a related field, or equivalent practical experience. Proficiency developing higher-level languages (e.g., PHP, Python, C++, or Java). Experience with deep learning software, frameworks, and APIs (e.g., PyTorch, etc.). Experience with enterprise security. Proven experience in threat modeling, security assessments, and penetration testing. Strong understanding of cybersecurity principles, frameworks, and standards. Understanding and experience with securing transfer and storage of deep neural network models. Base Salary Range$100,000-$300,000 USD #J-18808-Ljbffr

Meta's Product Security team is responsible for finding, mitigating, and preventing security flaws across Meta's family of products, including Facebook, Messenger, Instagram, and WhatsApp. We are looking for a Security Engineer to join GenAI Product Security team to secure Meta AI products and product integrations. Work directly with Meta Superintelligence Labs and other product groups to set secure design standards and build technology to scale and implement protections for novel and evolving agentic security risks. Security Engineer, GenAI Responsibilities Influence and align the organization's vision and strategy, while engaging our teams to develop and deliver specific, multi-year roadmaps, programs, and projects. Ensure prioritization, resourcing, and timely delivery of this work within a changing business environment Design and implement novel security solutions to protect against AI risks such as prompt injections where no industry standard exists Security Reviews: perform manual design and implementation reviews of products and services that make up the Meta ecosystem, like Instagram, WhatsApp, Oculus, Portal, and more Automated Analysis and Secure Frameworks: build automation (static and dynamic analysis) and frameworks with software engineers that enable Meta to scale consistently across all of our products Developer Guidance: provide guidance and education to developers that help prevent the authoring of vulnerabilities Bug Bounty: help provide technical guidance to our world class bug bounty program and independent security researchers Industry Impact: push the industry forward through conference talks and open source projects to contribute broadly to security for the world Minimum Qualifications B.S. or M.S. Computer Science, Engineering, or related technical discipline, or equivalent experience 10+ years experience dealing with security issues web programming languages, development practices, and common bug patterns Experience developing and delivering information on program status for senior leadership Experience leading and managing complex cross‑functional programs Experience with exploiting common security vulnerabilities Preferred Qualifications Experience contributing to the security community (public research, blogging, presentations, etc.) Experience writing software that enables security processes For those who live in or expect to work from California if hired for this position, please clickherefor additional information. About Meta Meta builds technologies that help people connect, find communities, and grow businesses. When Facebook launched in 2004, it changed the way people connect. Apps like Messenger, Instagram and WhatsApp further empowered billions around the world. Now, Meta is moving beyond 2D screens toward immersive experiences like augmented and virtual reality to help build the next evolution in social technology. People who choose to build their careers by building with us at Meta help shape a future that will take us beyond what digital connection makes possible today-beyond the constraints of screens, the limits of distance, and even the rules of physics. $213,000/year to $293,000/year + bonus + equity + benefits Individual compensation is determined by skills, qualifications, experience, and location. Compensation details listed in this posting reflect the base hourly rate, monthly rate, or annual salary only, and do not include bonus, equity or sales incentives, if applicable. In addition to base compensation, Meta offers benefits. Learn more about benefits at Meta. Equal Employment Opportunity Meta is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, sex (including pregnancy, childbirth, reproductive health decisions, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, political views or activity, or other applicable legally protected characteristics. You may view our Equal Employment Opportunity noticehere. Meta is committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures. If you need assistance or an accommodation due to a disability, fill out the Accommodations request form. #J-18808-Ljbffr

Perplexity is seeking a highly experienced and hands-on Cloud Security Engineer to join our dynamic security team, revolutionizing the way people search and interact with the internet. In this role, you'll lead efforts to build and maintain secure, scalable infrastructure that empowers engineers to innovate quickly and safely. Responsibilities Partner with infrastructure and engineering teams to embed security into development workflows and promote secure-by-default patterns Build Terraform modules with built-in security guardrails, such as logging, encryption, and automated threat detection enablement Deploy cloud-native detection capabilities using AWS GuardDuty, Security Hub, and custom detection rules to identify credential compromise, crypto-mining, and lateral movement Maintain SOC 2 Type II and ISO 27001 compliance through automated collection of cloud control evidence Conduct security audits of cloud resource configurations using tools like AWS Config and Open Policy Agent, and remediate deviations from CIS Benchmarks and our internal security policies Secure CI/CD and supply chain pipelines by implementing controls such as artifact signing, secret scanning, and dependency monitoring Apply zero trust principles through strict network segmentation, authentication, and authorization across our cloud environments Participate in the security on-call rotation and respond to security alerts and incidents to ensure rapid mitigation and root cause analysis Qualifications 4+ years of experience in Cloud Infrastructure, Platform Engineering, or similar roles Proven track record of building and scaling infrastructure at high-growth technology companies Deep understanding of cloud-native architectures, microservices, and distributed systems Experience securing CI/CD pipelines, deployment automation, and internal tooling Strong programming skills in Python, Go, or similar languages Bonus: Experience with AI/ML infrastructure and multi-cloud environments The cash compensation range for this role is $200,000 - $280,000. At Perplexity, we've experienced tremendous growth and adoption since publicly launching the world's first fully functional conversational answer engine in 2022. We've grown from answering 2.5 million questions per day at the start of 2024 to around 20 million daily queries in December 2024. We also offer Perplexity Enterprise Pro, which counts leading companies like Nvidia, the Cleveland Cavaliers, Bridgewater, and Zoom as customers. To support our rapid expansion, we've raised significant funding from some of the most respected technology investors. Our investor base includes IVP, NEA, Jeff Bezos, NVIDIA, Databricks, Bessemer Venture Partners, Elad Gil, Nat Friedman, Daniel Gross, Naval Ravikant, Tobi Lutke, and many other visionary individuals. In 2024, our employee base grew nearly 300%, and we're just getting started. Final offer amounts are determined by multiple factors, including, experience and expertise, and may vary from the amounts listed above. Equity: In addition to the base salary, equity may be part of the total compensation package. Benefits: Comprehensive health, dental, and vision insurance for you and your dependents. Includes a 401(k) pla #J-18808-Ljbffr

A tech company in San Francisco is seeking a Lead Security Engineer to enhance its security posture across various environments. The ideal candidate will have over 5 years of experience in security roles and expertise in cloud security, IAM, and secure systems design. Responsibilities include implementing scalable security controls and collaborating with cross-functional teams. The base pay range for this position is $220,000 - $330,000 USD. #J-18808-Ljbffr

Why Harvey At Harvey, we're transforming how legal and professional services operate - not incrementally, but end-to-end. By combining frontier agentic AI, an enterprise-grade platform, and deep domain expertise, we're reshaping how critical knowledge work gets done for decades to come. This is a rare chance to help build a generational company at a true inflection point. With 700+ customers in 58+ countries, strong product-market fit, and world-class investor support, we're scaling fast and defining a new category in real time. The work is ambitious, the bar is high, and the opportunity for growth - personal, professional, and financial - is unmatched. Our team is sharp, motivated, and deeply committed to the mission. We move fast, operate with intensity, and take real ownership of the problems we tackle - from early thinking to long-term outcomes. We stay close to our customers - from leadership to engineers - and work together to solve real problems with urgency and care. If you thrive in ambiguity, push for excellence, and want to help shape the future of work alongside others who raise the bar, we invite you to build with us. At Harvey, the future of professional services is being written today - and we're just getting started. Role Overview Some of the world's largest companies and their law firms use Harvey's AI capabilities to deliver world-class client services at unprecedented scale and efficiency. Harvey allows high-performing professionals to gain deep domain knowledge faster, understand the big picture, and tackle more complex challenges in less time. Security is at the heart of what we do. Our customers trust us with their most sensitive data, and we take that responsibility seriously. As part of our team, you'll help us maintain a secure, trustworthy, and compliant platform-an essential foundation for everything we build. As an Infrastructure Security Engineer, you'll design and build secure‑by‑default infrastructure that product teams can rely on. This includes designing and implementing processes and technologies for least privilege, isolating different components, managing attack surface, and implementing layers of tenant isolation on our multi‑tenant SaaS offering. You'll also create frameworks and repeatable patterns that enable our research and engineering teams to move quickly and independently-without sacrificing security. Our security program at Harvey is driven by our collective offensive security experience: breaking into systems at other companies (in white‑hat capacities), responding to real security incidents, and learning from other companies' data breaches. We regularly conduct penetration tests and red team exercises. At the same time, we are all software engineers-contributing code daily and approaching security with an engineering‑first mindset. What You'll Do Incorporate secure design principles into our cloud architecture. Develop isolation mechanisms (e.g. sandboxing) in collaboration with our product engineering team Review security‑critical configuration changes and act as Codeowner for security‑critical parts of our cloud configurations (everything is IaC) Audit our existing cloud environment for vulnerabilities Develop policies and procedures for the secure creation and operation of our cloud environments What You Have 5+ years experience in Security Engineering, Software Engineering, or Site Reliability Engineering roles Demonstrated experience writing high‑quality software and building production‑grade infrastructure and raising the quality bar of engineering teams Strong fundamentals in networking, operating systems, and cryptographic protocols In‑depth knowledge of Kubernetes, common misconfigurations, and privilege escalation vectors Demonstrated ability to find weaknesses (e.g. privilege escalation) in real‑world cloud environments Experience applying security best practices in cloud environments (AWS, Azure, or Google Cloud) (No experience with generative AI or legal required) Bonus Familiarity with large‑scale Infrastructure as Code (IaC) deployments Familiarity with Kubernetes Admission Controllers and policy enforcement Exposure to multi‑cloud environments Compensation Range $201,000 - $260,000 USD Please find our CA applicant privacy notice here. #LI-KV1 Harvey is an equal opportunity employer and does not discriminate on the basis of race, gender, sexual orientation, gender identity/expression, national origin, disability, age, genetic information, veteran status, marital status, pregnancy or related condition, or any other basis protected by law. We are committed to providing reasonable accommodations to applicants with disabilities, and requests can be made by emailing accommodations@harvey.ai #J-18808-Ljbffr

A leading entertainment and media enterprise is seeking a Senior Software Engineer to enhance cybersecurity efforts. The role involves designing internal tools, managing security frameworks, and collaborating with compliance teams. Candidates should possess at least 5 years of software development experience, knowledge in DevSecOps, and familiarity with cloud technologies. This position is integral to securing information systems across various Disney platforms, supporting innovative consumer experiences and operational excellence. #J-18808-Ljbffr

A leading technology company in California is seeking an experienced professional for a hands-on architecture position focused on network engineering. You will lead the design and deployment of ultra-high-speed network infrastructure for data centers. The ideal candidate has 12+ years in managing large-scale hybrid networks and a strong command of networking technologies. This role offers a competitive salary and an inclusive work environment. #J-18808-Ljbffr

A leading technology company in California is looking for a Staff Infrastructure Security Engineer. In this strategic role, you'll architect and operationalize security services to support a Zero Trust model, focusing on HashiCorp Vault. Candidates should have over 6 years of experience in cloud security and a proven track record of successfully deploying security solutions. This position plays a key role in driving the organization's security architecture while ensuring compliance with policies and governance. #J-18808-Ljbffr

Our mission is to modernize the payments infrastructure for trucking and logistics. We're building Stripe for Transportation, centering our customers in every way and offering them world-class customer experience. We have a strong founding team with backgrounds in payments, autonomous vehicles, and leading technology companies. We've raised $125 million+ from investors and have been named to Forbes' annual Next Billion-Dollar Startup List. Job Description AtoB is looking to hire a dedicated Application Security Engineer to join our small security team. You'll work cross-functionally with backend, frontend, DevOps, product, and compliance teams to push security forward in every part of our stack. Responsibilities Design and implement security tooling, automation, and processes to support secure development, deployment, and operations Perform threat modeling, design reviews, and security assessments (API, web, mobile, microservices) Conduct secure code reviews, dynamic and static application security testing, and penetration testing Work closely with engineering teams to remediate identified security issues and embed secure practices in SDLC Investigate and respond to application-level security incidents or suspicious behavior Help define and enforce security standards, policies, and best practices across the engineering organization Maintain and improve application security infrastructure Stay abreast of new threats, vulnerabilities, and relevant industry practices and share knowledge Requirements 4+ years of experience securing web and/or API-based applications in a production setting Hands-on experience with static analysis (SAST), dynamic analysis (DAST), interactive application security testing (IAST) or similar tools Experience performing manual code reviews in languages like Java, Python, Go, JavaScript/TypeScript Understanding of common web / API vulnerabilities (OWASP Top 10, API abuses, SSRF, injection, XSS, deserialization, etc.) Familiarity with authentication & authorization mechanisms (OAuth2/OIDC, JWT, session management, RBAC, etc.) Experience integrating security into a CI/CD pipeline (GitHub Actions, GitLab CI, Jenkins, CircleCI, etc.) Working knowledge of cloud platforms (AWS, GCP, Azure) and container/orchestration (Docker, Kubernetes) Strong problem-solving skills, ability to operate in ambiguity and drive security outcomes in fast-moving teams Excellent communication skills Compensation Range: $180K - $200K We are an equal opportunities employer and welcome applications from all qualified candidates. #J-18808-Ljbffr

About the Team Security is at the foundation of OpenAI's mission to ensure that artificial general intelligence benefits all of humanity. The Security team protects OpenAI's technology, people, and products. We are technical in what we build but are operational in how we do our work, and are committed to supporting all products and research at OpenAI. Our Security team tenets include: prioritizing for impact, enabling researchers, preparing for future transformative technologies, and engaging a robust security culture. About the Role We're seeking an exceptional Principal-level Offensive Security Engineer to challenge and strengthen OpenAI's security posture. This role isn't your typical red team job - it's an opportunity to engage broadly and deeply, craft innovative attack simulations, collaborate closely with defensive teams, and influence strategic security improvements across the organization. You will have the chance to not only find vulnerabilities but actively drive their resolution, automate offensive techniques with cutting‑edge technologies, and use your unique attacker perspective to shape our security strategy. This role will be primarily focused on continuously testing our agent powered products like Codex and Operator. These systems are uniquely valuable targets because they're rapidly evolving, have access to perform sensitive actions on behalf of users, and have large, diverse attack surfaces. You will play a crucial role in securing our agents by hunting for realistic vulnerabilities that emerge from the interactions between the applications, infrastructure, and models that power them. In this role you will: Continuously hunt for vulnerabilities in the interactions between the applications, infrastructure, and models that power our agentic products. Conduct open‑scope red and purple team operations, simulating realistic attack scenarios. Collaborate proactively with defensive security teams to enhance detection, response, and mitigation capabilities. Perform comprehensive penetration testing on our diverse suite of products. Leverage advanced automation and OpenAI technologies to optimize your offensive security work. Present insightful, actionable findings clearly and compellingly to inspire impactful change. Influence security strategy by providing attacker‑driven insights into risk and threat modeling. You might thrive in this role if you have: 7+ years of hands‑on red team experience or exceptional accomplishments demonstrating equivalent expertise. Deep expertise conducting offensive security operations within modern technology companies. Experience designing, developing, or testing assessing the security of AI‑powered systems. Experience working finding, exploiting and mitigating common vulnerabilities in AI systems like prompt injection, leaking sensitive data, confused deputies, and dynamically generated UI components. Exceptional skill in code review, identifying novel and subtle vulnerabilities. Proven experience performing offensive security assessments in at least one hyperscaler cloud environment (Azure preferred). Demonstrated mastery assessing complex technology stacks, including: Highly customized Kubernetes clusters Container environments CI/CD pipelines GitHub security mac OS and Linux operating systems Data science tooling and environments Python‑based web services React‑based frontend applications Strong intuitive understanding of trust boundaries and risk assessment in dynamic contexts. Excellent coding skills, capable of writing robust tools and automation for offensive operations. Ability to communicate complex technical concepts effectively through compelling storytelling. Proven track record of not just finding vulnerabilities but actively contributing to solutions in complex codebases. Bonus points: Background or expertise in AI or data science. Prior experience working in tech startups or fast‑paced technology environments. Experience in related disciplines such as Software Engineering (SWE), Detection Engineering, Site Reliability Engineering (SRE), Security Engineering, or IT Infrastructure. About OpenAI OpenAI is an AI research and deployment company dedicated to ensuring that general‑purpose artificial intelligence benefits all of humanity. We push the boundaries of the capabilities of AI systems and seek to safely deploy them to the world through our products. AI is an extremely powerful tool that must be created with safety and human needs at its core, and to achieve our mission, we must encompass and value the many different perspectives, voices, and experiences that form the full spectrum of humanity. We are an equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristic. For additional information, please see OpenAI's affirmative action and equal employment opportunity policy statement. Qualified applicants with arrest or conviction records will be considered for employment in accordance with applicable law, including the San Francisco Fair Chance Ordinance, the Los Angeles County Fair Chance Ordinance for Employers, and the California Fair Chance Act. For unincorporated Los Angeles County workers: we reasonably believe that criminal history may have a direct, adverse and negative relationship with the following job duties, potentially resulting in the withdrawal of a conditional offer of employment: protect computer hardware entrusted to you from theft, loss or damage; return all computer hardware in your possession (including the data contained therein) upon termination of employment or end of assignment; and maintain the confidentiality of proprietary, confidential, and non‑public information. In addition, job duties require access to secure and protected information technology systems and related data security obligations. To notify OpenAI that you believe this job posting is non‑compliant, please submit a report through this form. No response will be provided to inquiries unrelated to job posting compliance. We are committed to providing reasonable accommodations to applicants with disabilities, and requests can be made via this link. OpenAI Global Applicant Privacy Policy At OpenAI, we believe artificial intelligence has the potential to help people solve immense global challenges, and we want the upside of AI to be widely shared. Join us in shaping the future of technology. #J-18808-Ljbffr

About Radiant Security We're a SF Bay Area Cyber AI startup. Our vision is simple: enable all security teams to perform security operations with the efficiency and effectiveness needed to prevent breaches . We're a small team of researchers and engineers with a deep focus in cyber and AI. Our product automates the triage for any security alert leveraging deep research, big data and dozens of AI Agents. Join us and boost your career with hands‑on AI experience. The Role As an AI Security Context Engineer, you'll sit at the intersection of cybersecurity expertise and applied AI. Your mission is to translate deep security understanding into actionable context that teaches Radiant's AI agents how to think, reason, and triage real‑world security investigations. You'll partner closely with our AI research, engineering, and product teams to define how modern attacks should be interpreted, how alerts should be enriched, and how investigations should unfold across dozens of agentic steps. The work you do directly shapes the quality and accuracy of Radiant's autonomous investigations - this is one of the most critical roles in the company and central to our core value proposition. This is a rare opportunity to bring your SOC and detection experience into an AI‑forward environment, contribute to the next evolution of security automation, and build systems used by teams around the world. What problems will you be working on? Turning complex security signals (SIEM, EDR, IPS, cloud security logs, etc.) into high‑quality AI reasoning that powers fully automated investigations Translating attacker behaviors and TTPs into teachable patterns for AI agents to detect, correlate, and triage threats Defining the logic behind multi‑step agentic investigation workflows - which signals the AI should examine/compare, why, and how it should decide next steps Closing context gaps that break investigations, improving outcomes by shaping the “security intuition” of the model Stress‑testing AI reasoning end‑to‑end to ensure it mirrors how top SOC analysts think when handling real incidents What you'll do Shape how Radiant's AI agents think: translating real SOC workflows, attacker behaviors, and detection patterns into the reasoning that drives automated investigations Design and refine multi‑step investigation logic, curating which signals matter, how alerts should be enriched, and how AI agents decide next steps Evaluate and improve AI decision‑making and stress‑testing agentic workflows to ensure they replicate how top analysts actually investigate potential incidents Work with a modern, cloud‑native AI stack and have direct impact on one of the most critical components of Radiant's platform Develop a stronger understanding of agentic AI and how it is leveraged for detection and analysis Things we're looking for An undergraduate degree in computer science Experience as a security analyst in an operational capacity Having previously worked for security product companies (startups are a plus) A working knowledge of adversarial TTPs, malware infrastructure, and the malware economy Have previously worked hands‑on with a variety of security detection technologies that are part of a robust security program (SEIM, IPS, WAF, EDR) Past, relevant experience with cloud security technologies A track record of providing security subject matter expertise and guidance to people who are not security experts Benefits Generous equity package Unlimited PTO (take time when you need it) Top‑of‑market salary Great healthcare The process We're a startup and we're making decision quickly. Our process is designed to give you the best glimpse of our team and allow us to evaluate your technical and culture fit. Step 1: Executive interview + Technical interview Step 2: Virtual On Site: Technical and Leadership interviews #J-18808-Ljbffr

A leading data protection firm is seeking a Machine Learning Engineer to develop GenAI architectures and secure AI workflows. Ideal candidates should hold a PhD or MS in Computer Science and possess 2+ years of relevant experience. Key responsibilities include developing and testing machine learning models, conducting experiments, and collaborating within a team. The role offers competitive compensation along with benefits including health, PTO, and 401K options. #J-18808-Ljbffr

Remote • San Francisco • New York City • Portfolio • Remote • Remote • Full‑time Dragonfly is a crypto‑native Venture Capital and research firm with $4B+ in assets under management and 160+ portfolio companies. Our Talent team connects exceptional candidates with high‑impact technical roles across our portfolio. This is not a listing for an internal role at Dragonfly. This posting connects you directly with one or more of our portfolio companies actively hiring Security Engineers. What We're Looking For 2-5 years of experience in security engineering, operations, or infrastructure security, ideally across both cloud and crypto‑native environments. Solid understanding of application, network, and blockchain security principles. Hands‑on experience with SIEMs, EDR tools, or threat detection systems. Familiarity with GCP, AWS, or other production cloud environments, as well as containerized or distributed systems. Understanding of web3 security concepts such as multisig wallets, smart contract risks, validator security, and key management. Experience building or operating automated security monitoring and alerting pipelines. Strong scripting or automation skills (Python, TypeScript, or Go). Bonus: experience with security audits, compliance frameworks (SOC 2, ISO 27001, NIST CSF), or open‑source security tools. About the Role(s) Our portfolio companies are hiring across two main focus areas: Infrastructure‑Focused Roles Secure and monitor blockchain infrastructure, nodes, and validators. Build and maintain security tooling for on‑chain infrastructure, RPC endpoints, and key management systems. Harden cloud and network environments, implement defense‑in‑depth for production systems, and manage secrets and access control. Respond to infrastructure‑level threats, analyze incidents, and improve detection coverage. Application‑Focused Roles Partner with smart contract and product teams to secure DeFi, wallet, or protocol codebases. Contribute to application‑level threat modeling, auditing, and secure development practices. Develop internal tooling for vulnerability scanning, dependency management, and transaction monitoring. Work with on‑chain analytics and incident response for protocol or user‑level exploits. Even if you don't match every point but are passionate about security in crypto, we encourage you to apply. Process We'll confidentially match you with portfolio companies aligned with your background, skill set, and interests. If mutual interest exists, we'll facilitate a warm introduction. If there isn't a match today, we'll keep you top of mind for future opportunities. Our portfolio companies are globally distributed, hiring for remote, hybrid, and in‑person roles. They're building across the full crypto ecosystem-including DeFi, CeFi, infrastructure, L1s and L2s, creator/consumer apps, ZK, and Crypto x AI. All candidate submissions are strictly confidential. #J-18808-Ljbffr

Title of Role: Security Engineer Company Stage of Funding: Hyper-Growth, Highly Profitable Private Company Office Type: On-site, Full-Time Salary: Competitive (based on experience) + Equity Company Description We're representing one of the fastest-growing companies in the world, scaling from $1M to $500M in revenue run rate in just 17 months - with accelerating growth rates month over month. The company develops AI-powered systems trusted by the top 5 global AI labs, enabling faster and more accurate performance prediction in hiring and evaluation. With a lean and profitable team, they're scaling rapidly and looking for engineers eager to take ownership of security in a high-impact environment. Responsibilities Design and implement security controls across infrastructure, applications, and networks. Monitor for vulnerabilities, threats, and suspicious activity. Conduct penetration tests, vulnerability assessments, and incident response. Embed security practices into CI/CD pipelines and developer workflows. Ensure compliance with frameworks (SOC 2, ISO 27001, GDPR). Partner with engineers to make security a first-class part of system design. Research and respond proactively to emerging threats. Ideal Background Strong knowledge of security principles, tools, and best practices. Experience with SIEMs, IDS/IPS, firewalls, and vulnerability scanning. Familiarity with cloud security (AWS, GCP, or Azure). Solid understanding of encryption, authentication, and authorization systems. Track record of securing distributed, high-scale environments. Excellent collaboration and communication skills. Ability to balance security rigor with speed in a hyper-growth environment. Why Join Impact: Own the security function that powers critical infrastructure for the world's leading AI labs. Learning: Gain early exposure to frontier AI systems and emerging risks. Growth: Take on both infrastructure and research-adjacent projects with fast paths to ownership. Compensation and Benefits Salary: Highly competitive (commensurate with experience) Equity: Generous early-stage equity package Work Setup: On-site in San Francisco Other Benefits: Direct ownership of security architecture and practices Chance to shape security culture in a hyper-growth engineering environment Work alongside senior engineers at the intersection of AI and infrastructure This role is perfect for security engineers who want to build practical, scalable defenses in high-growth environments - balancing rigor with speed while safeguarding mission-critical AI infrastructure. Salary Range: $130,000-$500,000 base. https://www.recruitingfromscratch.com/ #J-18808-Ljbffr

About Mercor Mercor is training models that predict how well someone will perform on a job better than a human can. We use our platform to source, vet, and onboard expert contractors who help train AI models in a wide variety of domains. Our technology is so effective it's used by all of the top 5 AI labs. We scaled from $1-500M in revenue run rate in the last 17 months, making us the fastest growing company in the world. Our growth is accelerating. We averaged 11% week over week growth in July, 18% WoW growth in August, and 19% WoW growth in September. The team is small and we remain profitable because we can't hire great people as quickly as revenue is growing. About the Role As a Security Engineer at Mercor, you'll own the responsibility of safeguarding our systems, infrastructure, and data. You'll design and implement defenses, monitor for threats, and ensure security is integrated across the entire development and deployment lifecycle. This role is ideal for someone who thrives in fast-moving environments, can anticipate risks before they materialize, and loves building practical, scalable security systems without slowing down innovation. What You'll Work On Designing and implementing security controls across infrastructure, applications, and networks. Monitoring for vulnerabilities, threats, and suspicious activity. Performing penetration tests, vulnerability assessments, and incident response. Embedding security practices into CI/CD pipelines and development workflows. Ensuring compliance with frameworks such as SOC 2, ISO 27001, and GDPR. Partnering with engineers to ensure security is a first-class part of system design. Researching emerging threats and implementing countermeasures proactively. What We're Looking For Strong knowledge of security principles, tools, and best practices. Experience with SIEMs, IDS/IPS, firewalls, and vulnerability scanning. Familiarity with cloud security (AWS, GCP, or Azure). Solid understanding of encryption, authentication, and authorization systems. Proven track record of securing distributed, high-scale environments. Strong collaboration and communication skills. Ability to balance security rigor with business speed in a hyper-growth environment Why Mercor Impact: Your work powers how the world's leading AI labs train and test their models. Learning: Get early insights into frontier model capabilities months before the market. Growth: Work on both infrastructure and research-adjacent projects with fast paths to ownership. #J-18808-Ljbffr