Remote Backend Engineer – AI Agent Platform (Python)

GitLab; Polska; Remote; PLN 428,000 - 583,000; Full time

Benefits offered by this job

Flexible Paid Time Off

Equity Compensation

Growth and Development Fund

Parental Leave

Job summary

GitLab is seeking an Intermediate Backend Engineer (Python) to help build and scale the agentic AI experiences across the Duo Agent Platform, AI Gateway, and GitLab monolith. You will work across the stack with AI, product and UX teams, delivering secure, well-tested features and clear API contracts.

Strong emphasis on production-grade Python backend, LangGraph/LangChain, and API design, with opportunities to influence architecture and testing strategies in a remote, async team.

Qualifications

• Experience building and maintaining production Python backend applications.
• Experience with LLM application frameworks such as LangGraph.
• Experience designing scalable APIs (REST, GraphQL or gRPC).

Responsibilities

• Develop, ship and maintain features for the Duo Agent Platform in the Duo Workflow Service, the AI Gateway and the GitLab monolith.
• Build and improve agentic flows and their reusable parts with LangChain and LangGraph, including the Flow Registry.
• Work with Product Management, UX, frontend, backend and AI specialists to refine requirements and ship improvements in small iterations.
• Design, implement and review APIs (including GraphQL and REST) and the backend logic behind them, with reliable, scalable and clear contracts for clients such as the GitLab monolith, IDE extensions and Duo CLI.
• Improve and extend automated testing (pytest and other frameworks), including evaluations of agent and flow behavior, 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 as more work becomes agentic.

Skills

Python backend

API design

LLM frameworks

Async processing

Performance tuning

Cross-stack familiarity

Documentation

Remote collaboration

Tools

LangGraph

LangChain

GraphQL

REST

gRPC

Ruby on Rails

Vue.js

Job description

GitLab is seeking an Intermediate Backend Engineer (Python) to help build and scale the agentic AI experiences across the Duo Agent Platform, AI Gateway, and GitLab monolith. You will work across the stack with AI, product and UX teams, delivering secure, well-tested features and clear API contracts.

Strong emphasis on production-grade Python backend, LangGraph/LangChain, and API design, with opportunities to influence architecture and testing strategies in a remote, async team.