Senior Backend Engineer

Role Overview

Join GitLab as a Senior Backend Engineer (Ruby on Rails) to shape how teams plan, document, and share knowledge. You will build backend systems, collaborate across teams, and help design AI-powered capabilities for reliable, scalable workflows.

Key Missions

• Lead backend architecture for GitLab features including Wiki, Pages, Markdown, and text editor capabilities.
• Design and build AI agents that support planning and knowledge management workflows.
• Improve reliability and performance across:
  • application code
  • PostgreSQL queries
  • Redis usage
  • background jobs

What You Bring

• Experience building or integrating AI agents and intelligent workflows (or transferable adjacent platform/backend experience).
• Strong communication and cross-functional collaboration.
• Experience leading technical decisions, mentoring engineers, and contributing to engineering standards.
• GraphQL API design experience with focus on usability, maintainability, and performance.
• Familiarity with Model Context Protocol (MCP) or similar patterns for connecting APIs to external tools/platforms.
• Deep knowledge of PostgreSQL query design, optimization, and scaling in high-traffic production systems.
• Strong backend experience building and maintaining applications with Ruby on Rails, including ActiveRecord and Redis.
• Ability to investigate production issues, debug complex systems, and continuously improve reliability.

Nice to Have

• Background in knowledge management, planning workflows, or platforms that connect external tools to backend services (via MCP-like patterns).