Ruby On Rails Developer w Warszawa, Polska

Your responsibilities

• Develop and maintain server-side features in a large Ruby on Rails codebase organized by domain.
• Design and optimize relational data models in PostgreSQL; integrate with MSSQL where required.
• Implement and maintain background processing with Sidekiq and ensure reliable job flows.
• Build and maintain REST APIs and WebSocket endpoints; implement secure authentication (JWT, cookie-based, OAuth).
• Write and maintain automated tests (Minitest or similar), using fixtures and following test-first practices where appropriate.
• Participate in architectural decisions with scalability and security in mind.
• Use feature flags (LaunchDarkly) to deliver safe, incremental releases; monitor errors via Sentry and work with analytics in Metabase.
• Review and refine code produced with AI assistance and apply critical judgement to ensure quality and security.
• Work closely with stakeholders and clients in English and participate in technical calls, demos, and requirements discussions.
• Contribute to continuous integration and delivery pipelines (Docker, CI/CD) and collaborate on operational improvements.

Our requirements

What we offer