Backend Engineer (Ruby), AI Engineering: Duo Agent Platform Tools

ABOUT THE ROLE As an Intermediate Backend Engineer on the Duo Agent Platform Tools team at GitLab, you will play a key role in designing, building, and maintaining systems that enable AI agents to interact with the full software delivery lifecycle. This involves contributing to the development of complex features, establishing architectural patterns, and collaborating with engineers across the Agent Foundations stage and adjacent teams within AI engineering. WHAT YOU'LL DO As a Backend Engineer on this team, you will be responsible for developing, shipping, and maintaining features and improvements for Agentic Tools across the GitLab monolith backend. This includes collaborating with Product Management, UX, frontend, backend, and AI specialists to refine requirements and deliver high-quality, iterative product enhancements. You will also design, implement, and review GraphQL, REST APIs, and related backend logic to ensure reliability, scalability, and clear contracts with frontend clients. Additionally, you will improve and extend automated testing, including RSpec and other frameworks, to strengthen quality, reliability, and developer feedback loops. You will also participate in on-call rotations to troubleshoot production issues, contribute to root cause analysis, and enhance observability and resiliency. WHAT YOU'LL NEED To be successful in this role, you will need experience building and maintaining production applications with Ruby on Rails, including work with background jobs, APIs, and data models. You should be comfortable working across the stack in a mature codebase, with familiarity with Python backends and/or Vue frontends a plus. You will also need proficiency in designing or extending REST and/or GraphQL APIs with attention to scalability, maintainability, and backward compatibility. Strong practical experience working with AI tooling on a daily basis is also essential, with experience designing and shipping AI-powered backend features and integrations a plus. You should also have SQL skills and familiarity with relational databases such as PostgreSQL, including writing efficient queries and understanding data modeling. WHY REMOTE As a remote employee, you will be part of a distributed team that values collaboration, innovation, and efficiency. You will have the flexibility to work from anywhere, at any time, and will be expected to communicate effectively with your colleagues through asynchronous communication channels. BENEFITS GitLab offers a comprehensive benefits package to support your health, finances, and well-being. This includes flexible paid time off, team member resources, and a total rewards package that includes benefits such as health insurance, parental leave, and education stipend.