Principal Security Researcher

GitLab is the intelligent orchestration platform for DevSecOps. GitLab enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. More than 50 million registered users and more than 50% of the Fortune 100* trust GitLab to ship better, more secure software faster. The same principles built into our products are reflected in how our team works: we embrace AI as a core productivity multiplier, with all team members expected to incorporate AI into their daily workflows to drive efficiency, innovation, and impact. GitLab is where careers accelerate, innovation flourishes, and every voice is valued. Our high-performance culture is driven by our values and continuous knowledge exchange, enabling our team members to reach their full potential while collaborating with industry leaders to solve complex problems. Co-create the future with us as we build technology that transforms how the world develops software. *Fortune 500® is a registered trademark of Fortune Media IP Limited, used under license. Claim based on GitLab data. Fortune 100 refers to the top 20% ranked companies in the 2025 Fortune 500 list, published in June 2025. Fortune and Fortune Media IP Limited are not affiliated with, and do not endorse products or services of GitLab. An overview of the role We are seeking a Principal Security Researcher to join our Application Security Team to conduct cutting-edge security research on GitLab's AI-powered DevSecOps capabilities. As GitLab transforms software development through intelligent collaboration between developers and specialized AI agents, we need security researchers who can proactively identify and validate vulnerabilities before they impact our platform or customers. In this role, you'll be at the forefront of security research, working with our GitLab DevSecOps platform, Duo Agent Platform, GitLab Duo Chat, and AI workflows that represent the future of human/AI collaborative development. You'll develop novel testing methodologies (including for AI agent security), conduct hands-on penetration testing, and translate emerging threats into actionable security improvements. Your research will directly influence how we build and secure the next generation of AI-powered DevSecOps tools, ensuring GitLab remains the most secure software factory platform on the market. This position offers the unique opportunity to shape security and AI security practices in one of the world's largest DevSecOps platforms, working with engineering teams who are pushing the boundaries of what's possible with AI-assisted software development. You'll have access to cutting-edge AI systems and the freedom to explore creative attack scenarios while contributing to the security of millions of developers worldwide. This role reports to the Senior Manager of Application Security. What you'll do - Conduct and lead security research projects across multiple functional areas. - Identify novel, systemic, and chained vulnerabilities in GitLab, where individual weaknesses combine for outsized impact. - Validate security vulnerabilities through hands-on testing, developing proof-of-concept exploits that demonstrate real-world attack scenarios. - Assess emerging industry vulnerability classes against the GitLab codebase, and drive remediation of the class rather than the instance. - Lead security research into GitLab's AI and agentic surfaces, and define the security requirements that engineering teams build against. - Build and direct the tooling and automation that scales security research, including agent-assisted vulnerability discovery across our codebase. - Research the security posture of open source tools and dependencies integrated with GitLab, report findings to their maintainers, and track mitigation following our responsible disclosure guidelines. - Solve technical problems of the highest scope, complexity, and ambiguity. - Help shape the team and sub-department roadmap. - Lead the integration of security research results into the engineering and business functions that need to act on them. - Teach, mentor, and advise other domain experts and individual contributors across several teams. - Share knowledge and novel vulnerability types with the security community. What you'll bring - 10+ years of experience in security research, penetration testing, or offensive security roles - Strong ability in discovering and exploiting vulnerabilities in large codebase and complex systems - Proficiency in two or more of Ruby, Go, Python, TypeScript, or Rust. - Ability to read and analyze code across multiple languages and codebases - Strong knowledge of AI frameworks - Strong understanding of AI attack vectors including prompt injection, agent manipulation, and workflow exploitation - At ease in establishing and driving complex remediation initiatives involving cross-functional teams - Excelle

10+ years of experience in security research, penetration testing, or offensive security roles; Proficiency in two or more programming languages (Ruby, Go, Python, TypeScript, or Rust); Ability to read and analyze code across multiple languages and codebases; Strong knowledge of AI frameworks; Strong understanding of AI attack vectors including prompt injection, agent manipulation, and workflow exploitation.