Senior Ruby on Rails Developer

At Momentum, we accelerate digital innovation in healthcare. Our mission is to empower HealthTech startups and scaleups by transforming ideas into cutting-edge digital products. We combine deep industry expertise, strategic consulting, and full-stack development to create solutions that drive growth, compliance, and patient impact.

We work AI-first. AI is part of our everyday work, in development and in delivery. We keep testing new tools, agents and workflows, and when we find a better way to build, we change how we work.

But in healthcare, AI output is a starting point, not a final answer. Verification and ownership stay with us. We believe in technology that makes healthcare more accessible, efficient, and human-centered.

• 5+ years of commercial experience with Ruby and Ruby on Rails
• Strong knowledge of relational database design (e.g. PostgreSQL)
• Ability to implement various communication methods with the client (e.g. REST API, WebSockets)
• Ability to implement various authentication methods (e.g. JWT, cookie-based auth, OAuth)
• Experience with CI/CD, deployment tools, Docker, and Git
• Practical knowledge of design patterns and SOLID principles
• Practical experience in writing and maintaining automated tests using RSpec or similar frameworks
• Practical knowledge of non-relational databases, caching and message brokers
• Experience in diagnosing and solving performance and optimization problems
• Ability to contribute to project architecture with an understanding of scalability concepts
• Love for code review, both giving and receiving it
• Willingness to help other developers and share knowledge
• Using AI tools in daily work and ability to critically review AI-generated code
• Fluent written and spoken English and Polish
• Interest in HealthTech and working on projects where quality, security and compliance matter

Nice to have:

• Knowledge of JavaScript frameworks like Vue or React
• Experience with AWS or similar platform
• Experience with Web Server (e.g. Nginx)
• Degree in Computer Science or relevant field
• Healthtech or pharmacy experience: HIPAA, e-prescribing, insurance, FHIR
• Experience working embedded with a client, in consulting, as an FDE, or in startups wearing several hats

• Designing and building web applications using Ruby on Rails
• Designing and implementing relational databases
• Collaborating with cross-functional teams to define, design and ship new features
• Writing automated tests for your code, including edge cases, usability and general reliability
• Fixing bugs and improving performance
• Reviewing code, including AI-generated code, with the same standards as any other
• Helping define and improve internal standards for maintainability and style
• Using AI tools (e.g. Claude) to speed up development work
• Communicating directly with clients when needed: clarifying requirements, discussing technical solutions and presenting your work
• Continuously discovering, testing and implementing new technologies and workflows, and sharing what works with the team

Administratorem Twoich danych jest Momentum Sp Zoo, Gen. Władysława Sikorskiego 26, 53-659 Wrocław (dalej:
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