Senior Backend Engineer, Ruby – AI Engineering at GitLab

About the role

Senior Backend Engineer designing and implementing AI tools for GitLab's software delivery lifecycle. Collaborating across teams to enhance AI agent interactions and software delivery efficiencies.

Develop, ship, and maintain features and improvements for Agentic Tools across the GitLab monolith backend in a secure, well-tested, and performant way.
Collaborate with Product Management, UX, frontend, backend, and AI specialists to refine requirements and deliver high-quality, iterative product enhancements.
Design, implement, and review GraphQL, REST APIs and related backend logic, ensuring reliability, scalability, and clear contracts with frontend clients.
Improve and extend automated testing, including RSpec and other frameworks, to strengthen quality, reliability, and developer feedback loops.
Share standards, patterns, and learnings with other engineers, raising the bar for responsible AI integration and evidence-driven engineering across the team.
Participate in Tier 2 on-call rotations to troubleshoot production issues, contribute to root cause analysis, and enhance observability and resiliency.
Bring a sharp eye to the competitive landscape, helping us understand what it takes to keep GitLab’s MCP server best-in-class in an increasingly agentic world.

Experience building and maintaining production applications with Ruby on Rails, including work with background jobs, APIs, and data models.
Comfortable working across the stack in a mature codebase. Familiarity with Python backends and/or Vue frontends a plus.
Proficiency in designing or extending REST and/or GraphQL APIs with attention to scalability, maintainability, and backward compatibility.