Senior Backend Engineer, AI Engineering: Chat

GitLab is seeking a Senior Backend Engineer to join the Duo Chat team, focusing on Chat Engine. The successful candidate will build core AI capabilities behind GitLab Duo Chat, a natural-language and agentic interface to the GitLab DevSecOps platform.

Responsibilities:

• Design and build flow components and agentic flows in the Flow Registry using Python and LangGraph within the Duo Workflow Service.
• Develop, ship, and maintain backend features for GitLab Duo Chat across the Python Duo Workflow Service and the GitLab Rails monolith.
• Integrate new generative AI models, providers, tools, and multi-agent orchestration patterns into Duo Chat.
• Design, implement, and review GraphQL and Representational State Transfer (REST) application programming interfaces (APIs).
• Improve debugging, observability, and test coverage using pytest, RSpec, and related frameworks.
• Collaborate with Product, User Experience (UX), frontend, and AI specialists to refine requirements and deliver high-quality improvements.
• Document standards, patterns, and learnings with other engineers.
• Participate in Tier 2 on-call rotations to troubleshoot production issues.

Requirements:

• Significant experience building and maintaining production Python backends.
• Practical experience designing and shipping AI-powered, agentic backend features.
• Working proficiency in Ruby on Rails, or a strong willingness to learn it.
• Proficiency designing or extending REST or GraphQL APIs.
• Strong Structured Query Language (SQL) skills and familiarity with relational databases such as PostgreSQL.
• Ability to find, diagnose, and prevent performance and reliability problems at scale.
• Experience solving technical problems of high scope and complexity.

Benefits:

• Benefits to support your health, finances, and well-being
• Flexible Paid Time Off
• Team Member Resource Groups
• Equity Compensation & Employee Stock Purchase Plan
• Growth and Development Fund
• Parental Leave