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Backend Engineer (Ruby), AI Engineering: Agent Foundations
GitLab
Remote · Poland, United KingdomSalary not disclosedfull-timeGitLab Careers
An overview of this role As an Intermediate Backend Engineer in GitLab's Agent Foundations stage, you'll go beyond using AI tools. You'll help build the foundations for GitLab's agentic AI experiences: the platform that lets AI agents work across the whole software delivery lifecycle, not just write code.
Responsibilities
- Develop, ship and maintain features for the Duo Agent Platform in the GitLab monolith (Ruby) and, where needed, the AI Gateway (Python). Keep them secure, well-tested and performant.
- Work with Product Management, UX, frontend, backend and AI specialists to refine requirements and ship improvements in small iterations.
- Design, implement and review GraphQL and REST APIs and the backend logic behind them, with reliable, scalable and clear contracts for clients.
- Improve and extend automated testing (RSpec and other frameworks) to strengthen quality and give developers faster feedback.
- Share standards, patterns and learnings with other engineers to raise the bar for responsible AI integration and evidence-driven engineering.
- Join Tier 2 on-call rotations to troubleshoot production issues, contribute to root cause analysis, and improve observability and resiliency.
- Keep an eye on the competitive landscape to help keep GitLab's agent platform best-in-class.
Languages
- Work format
- Remote
- Seniority
- Mid
- Posted
- 8 Jul 2026
- Last verified
- In the last 5 days