Senior Backend Engineer (Ruby), AI Catalog: External Agents

Overview

Senior Backend Engineer for GitLab’s External Agents team, building and maintaining integrations that connect GitLab agents and external AI tools to products like Slack.

What you'll do

• Develop, ship, and maintain secure external agent integrations across the GitLab monolith backend.
• Design and review GraphQL and REST APIs and related backend logic with clear contracts for clients.
• Improve and extend automated testing using RSpec and other frameworks.
• Own end-to-end delivery of complex features and help shape architectural patterns for GitLab’s AI exposure.
• Participate in Tier 2 on-call to troubleshoot production issues and support root cause analysis.
• Collaborate with product, frontend, backend, and AI specialists to iteratively refine requirements and deliver improvements.

What you'll need

• Production experience building and maintaining applications with Ruby on Rails, including background jobs, APIs, and data models.
• Comfort working across the stack in a mature codebase.
• Proficiency designing or extending REST or GraphQL APIs with scalability, maintainability, and backward compatibility in mind.
• Practical experience designing and shipping AI-powered backend features or integrations.
• Strong SQL skills and familiarity with relational databases such as PostgreSQL.
• Experience identifying and addressing performance bottlenecks at the application and relevant infrastructure layers.

Details

• Work location: Remote, United Kingdom.
• On-call: Tier 2 on-call rotations.