Mid/Senior Ruby On Rails Developer

The company operates in the healthtech sector delivering solutions for the US market that accelerate patient access to prescribed medicines.

• Mid: minimum 3 years, Senior: minimum 5 years professional experience with Ruby and Ruby on Rails.
• Strong experience with PostgreSQL and relational database design; familiarity with NoSQL, caching, and message brokers.
• Practical knowledge of REST APIs, WebSockets, and authentication methods (JWT, cookie-based, OAuth).
• Experience with CI/CD, Docker, and Git workflows.
• Good understanding of design patterns, SOLID principles, and automated testing (RSpec, Minitest, or similar).
• Experience making architectural decisions regarding scalability and reliability.
• Daily use of AI tools in development and ability to critically review AI-generated code.
• Fluent English for client-facing communication; fluent Polish for internal collaboration.

Nice to have:

• Frontend experience with Vue or React.
• Experience with AWS (or other cloud providers) and Nginx.
• Background in HealthTech or pharmacy domains (HIPAA, e-prescribing, insurance workflows, FHIR).
• Experience working embedded at client sites, consulting, as full-stack delivery engineer, or in startups with broad 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 as 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 test-first practices.
• Participate in architectural decisions with scalability and security in mind.
• Use feature flags (LaunchDarkly) for safe, incremental releases; monitor errors via Sentry and work with analytics in Metabase.
• Review and refine code produced with AI assistance, ensuring quality and security.
• Work closely with stakeholders and clients in English; participate in technical calls, demos, and requirements discussions.
• Contribute to continuous integration and delivery pipelines (Docker, CI/CD) and collaborate on operational improvements.