Senior Fullstack Engineer

Senior Fullstack Engineer (RoR/vue.js), Software Supply Chain Security: Authorization Remote, Canada; Remote, Netherlands; Remote, United Kingdom An overview of this role As a Senior Full Stack Engineer on the Authorization team at GitLab, you'll build the critical systems that determine who can access what across the entire GitLab platform—impacting millions of users from startups to Fortune 500 enterprises. This role focuses on architecting and implementing GitLab's next-generation Authorization infrastructure, including policy-as-code systems, fine-grained permissions, and performance optimization at massive scale. Your contributions will directly enable GitLab's evolution toward zero-trust architecture while ensuring authorization decisions remain fast, secure, and correct. What You'll Do Implement fine-grained permission systems for Job Tokens, Personal Access Tokens, Duo agent platform and other authentication mechanisms Collaborate with Security, Database, and Platform teams on the new Auth stack initiative Solve complex performance challenges including authorization query optimization, caching strategies, and database decomposition Design authorization systems that work seamlessly across multiple deployment models and multi-tenant architectures Advocate for improvements to authorization security, maintainability, and developer experience through code review and technical leadership Contribute to architectural decisions for authorization features with a 12-month+ strategic view Mentor team members on authorization patterns, policy languages, and secure coding practices What You'll Bring Significant professional experience with Ruby on Rails and Vue.js in production environments Strong understanding of authorization concepts: RBAC, ABAC, and fine-grained access control patterns Experience with high-scale backend systems that handle millions of requests per day Deep knowledge of database optimization, particularly PostgreSQL performance tuning and query optimization Familiarity with policy-based authorization systems or strong interest in learning Cedar, Rego, or similar policy languages Understanding of security principles including threat modeling, least-privilege access, and zero-trust architectures Experience with distributed systems, caching strategies, and service-to-service communication Proven ability to own complex technical initiatives from design through production deployment Strong collaboration skills for working across multiple engineering teams in an asynchronous, remote environment Comfort working in a highly agile, iterative development process with focus on shipping value incrementally About the team The Authorization team is responsible for building and maintaining GitLab's permission systems to be more secure, scalable, and flexible. We're currently executing a major authorization systems redesign that will fundamentally transform how authorization works across GitLab. The team works closely with: Authentication & Product Security teams for integrated identity and access management Database team for query optimization and data model design Security team for threat modeling and security architecture reviews Country Hiring Guidelines GitLab hires new team members in countries around the world. All of our roles are remote, however some roles may carry specific location-based eligibility requirements. Our Talent Acquisition team can help answer any questions about location after starting the recruiting process. Equal Employment Opportunity GitLab is proud to be an equal opportunity workplace and is an affirmative action employer. GitLab’s policies and practices relating to recruitment, employment, career development and advancement, promotion, and retirement are based solely on merit, regardless of race, color, religion, ancestry, sex (including pregnancy, lactation, sexual orientation, gender identity, or gender expression), national origin, age, citizenship, marital status, mental or physical disability, genetic information (including family medical history), discharge status from the military, protected veteran status (which includes disabled veterans, recently separated veterans, active duty wartime or campaign badge veterans, and Armed Forces service medal veterans), or any other basis protected by law. GitLab will not tolerate discrimination or harassment based on any of these characteristics. See also GitLab’s EEO Policy and EEO is the Law. If you have a disability or special need that requires accommodation, please let us know during the recruiting process. #J-18808-Ljbffr