Intermediate-Senior Backend Engineer (Ruby), Spec-Driven Development

New

GitLabDevSecOps software

Remote, PolandFull-TimeMiddle

Salary272,000 - 408,000 PLN per year

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Job Details

Have strong Ruby on Rails experience in a large production codebase.
Have production experience with Python.
Have experience driving substantial projects involving several engineers over multiple months, with clear user or business outcomes.
Bring a product mindset and experience owning features end to end, including scope, trade-offs, user engagement, and post-launch adoption.
Have a full-stack background with a current focus on backend engineering.
Be able to read modern frontend code and design effective APIs.
Have strong API design and SQL fundamentals.
Have experience exploring AI-assisted development.
Be able to work independently and collaborate across functions and regions.
Be able to support others through technical leadership and mentoring.

Lead backend features from early product discussions through technical design, implementation, rollout, and post-launch learning.
Build flows, APIs, and data models for agent-generated work items, implementation plans, durable specifications, and mergeable code.
Develop evaluation and benchmarking systems to measure workflow quality, token cost, and success rate.
Build reliable production systems using Ruby on Rails and Python, alongside PostgreSQL, GraphQL, GitLab Duo Agent Platform, LLM APIs, and an AI gateway.
Collaborate with product, design, engineers, design partners, and users to shape scope and make practical trade-offs.
Coordinate multi-person projects and communicate decisions in GitLab's asynchronous, all-remote environment.
Mentor engineers and contribute to technical direction across the Plan group and related AI initiatives.
Work in short iterations, share progress through demos, and use results and user feedback to guide next steps.

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