Senior Software Engineer (Ruby), Security Platform: Authorization

In this senior role, you will own and evolve GitLab’s authorization model across Ruby on Rails and a next-generation policy stack. You’ll work on fine-grained token permissions, custom roles, and the GraphQL/REST surfaces that enforce them, with an eye toward performance, security, and scalability. You’ll help bridge the Rails monolith with a Rust-based policy engine and a shared authorization platform. You’ll collaborate across authentication, platform, AI, and modular services to shape how access is governed at scale. This is a hands-on, impact-driven opportunity to strengthen security posture while enabling broad, secure access for users, tokens, and automated agents.

• Flexible Paid Time Off
• Equity Compensation & Employee Stock Purchase Plan
• Growth and Development Fund
• Parental Leave
• Team Member Resource Groups

• Design and ship authorization changes in the Rails monolith with high-permission-check workloads
• Own work streams end-to-end from problem definition to rollout and verification
• Extend fine-grained permissions for tokens and roles across resources and principals
• Harden authorization enforcement across GraphQL and REST APIs
• Refactor policy code to support dual evaluation by monolith and authorization engine
• Improve reliability, performance, and security of authorization systems, reducing debt
• Collaborate with authentication, platform, and modular-service teams on interfaces and contracts
• Contribute to design docs, architecture decisions, and code reviews in an asynchronous environment

• Production Ruby on Rails experience
• Experience designing/implementing authorization systems (RBAC & fine-grained permissions)
• Security mindset with ability to assess blast radius
• Experience with large, long-lived codebases and careful migrations
• Knowledge of GraphQL and API authorization patterns
• Attention to performance at scale
• Strong written communication

• Strong written communication
• ability to work asynchronously and document decisions
• problem-solving mindset
• Ruby on Rails
• Authorization systems design (RBAC, fine-grained permissions)
• GraphQL and REST API authorization patterns