Senior Backend Engineer, Create – Source Code Experience, Ruby at GitLab

About the role

Senior Backend Engineer building Ruby and GraphQL source-code workflows for GitLab’s DevSecOps platform. Improving reliability, performance, and collaboration across repositories and AI-assisted development.

Develop secure, well-tested, performant features and improvements using Ruby and GraphQL
Turn complex requirements and legacy constraints into clear solutions while maintaining system reliability
Design and maintain backend services, APIs, data models, and business logic supporting source code workflows
Collaborate asynchronously and synchronously across functions and teams, involving domain experts when useful
Use AI coding agents for well-scoped work and critically review their output
Write maintainable code following GitLab standards and advocate for standards through code review
Monitor production health metrics, participate in Tier 2 on-call, troubleshoot incidents, perform root cause analysis, and improve observability and resiliency
Share knowledge through code review, technical documentation, and everyday collaboration

Professional experience building backend web applications, services, or APIs using Ruby and GraphQL
Solid understanding of relational databases, SQL, data modeling, caching, background processing, and backend performance best practices
Experience improving complex, user-facing workflows and making underlying systems reliable and maintainable
Experience writing backend unit, integration, and acceptance tests
Familiarity with the testing pyramid, Git, and collaborative code review processes
Experience using AI coding agents to scope tasks, review output, and assess limitations in a complex monorepo
Clear written and spoken English communication skills
Ability to influence without authority and provide useful status updates in a remote, asynchronous environment
Ability to manage priorities independently, work through ambiguity, take ownership, and seek guidance for difficult-to-reverse decisions