Backend Engineer - AI-Driven Plans (Remote, Async)

GitLab; Polska; Hybrid; PLN 180,000 - 240,000; Full time

Job summary

GitLab is seeking a Backend Engineer for the Plan: Spec-Driven Development team. You’ll own backend work across flows, APIs, data models, and evaluation systems using Ruby on Rails, Python, and PostgreSQL, within an all-remote product to accelerate AI-enabled workflows.

You’ll collaborate across product, design, and users, lead features end-to-end, mentor peers, and contribute to strategic AI initiatives while delivering high-impact backend solutions in a fast-paced, distributed environment.

Qualifications

• Strong Ruby on Rails experience in a large production codebase.
• Production Python experience is a plus.
• Product mindset with end-to-end feature ownership.
• Ability to read modern frontend code and design effective APIs.

Responsibilities

• Lead backend features from early product discussions through design, implementation, rollout, and post-launch learning.
• Build the flows, APIs, and data models behind agent-generated work items, implementation plans, and mergeable code.
• Develop evaluation and benchmarking systems that measure workflow quality, token cost, and success rate.
• Use Ruby on Rails and Python to build reliable production systems with PostgreSQL and GraphQL.
• Collaborate with product, design, engineers, and users to shape scope and make practical trade-offs.
• Coordinate multi-person projects across the team in an asynchronous, all-remote environment.
• Mentor other engineers and contribute to technical direction across the Plan group and AI initiatives.
• Work in short iterations, share progress through demos, and use feedback to guide next steps.

Skills

Ruby on Rails

Python

End-to-end ownership

Full stack backend

APIs design

Leadership mentoring

Tools

GraphQL

PostgreSQL

Job description

GitLab is seeking a Backend Engineer for the Plan: Spec-Driven Development team. You’ll own backend work across flows, APIs, data models, and evaluation systems using Ruby on Rails, Python, and PostgreSQL, within an all-remote product to accelerate AI-enabled workflows.

You’ll collaborate across product, design, and users, lead features end-to-end, mentor peers, and contribute to strategic AI initiatives while delivering high-impact backend solutions in a fast-paced, distributed environment.