Senior Ruby on Rails Developer

About Momentum:

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 believe in technology that makes healthcare more accessible, efficient, and human-centered.

Role overview:

We are looking for a Senior Ruby on Rails Developer to join our team and help build robust, scalable web applications. If you have extensive experience with Ruby on Rails, love crafting clean and maintainable code, and enjoy solving complex problems - this role is for you!

You’ll shape project architecture, optimize performance, and ensure code quality while collaborating with cross-functional teams. If you love solving complex problems and mentoring others, we’d love to have you on board!

Requirements:

• Expert in Ruby and Ruby on Rails (4+ years development experience)
• Strong knowledge of relational DBs design (e.g. PostgreSQL)
• Ability to implement various ways of communication with client (e.g. REST API, WebSockets)
• Ability to implement various ways of authentication (e.g. JWT, cookie-based auth, OAuth)
• Knowledge of Unix systems and shell
• Experience with CI/CD, deployment tools (e.g. mina), Docker and Git
• Practical knowledge of design patterns and SOLID principles
• Practical knowledge of non-relational DBs, cache and message brokers systems
• Love for code review
• Fluent written and spoken English
• Fluent written and spoken Polish
• Experience with performance and optimization problems, ability to diagnose and solve them
• Ability of building the whole project’s architecture based on business requirements, functional and non-functional e.g. knows scaling concepts and applies them accordingly
• Ability to solve problems with high complexity, enjoy helping other developers
• Ability to define and improve internal standards for maintainability and style

Nice to have:

• Knowledge of JavaScript framework like Vue or React
• Experience with AWS or similar platform
• Experience with Docker
• Experience with Web Server (e.g. Nginx)
• Degree in Computer Science or relevant field

Responsibilities:

• Design and build web applications using Ruby on Rails
• Design and implement relational databases
• Collaborate with cross-functional teams to define, design, and ship new features
• Write automated tests for your code including edge cases, usability, and general reliability
• Work on bug fixing and improving performance
• Continuously discover, evaluate, and implement new technologies

What we offer:

• Modern Workspace: We provide a modern and comfortable office environment, right in the heart of Wrocław.
• Work-Life Harmony: Enjoy flexible working hours, allowing you to find the perfect balance between work and life.
• Stay Active: Our company Multisport benefit encourages you to stay fit and take care of your well-being.
• Your Health Matters: Access to private healthcare ensures you're taken care of when you need it most.
• Remote Support: For our remote team members we offer reimbursement for necessary and the non-necessary office visits.
• Freedom of choice: We understand that we all have different lifestyles and needs, that's why the Worksmile Cafeteria System gives you access to hundreds of non-wage benefits to choose from.  
• Security and peace of mind: We provide the option to join our comprehensive insurance plan, for your and your loved one’s security.
• Team Building & Development Fun(d): We believe in the power of fun and development, and microfunds are here to bring some excitement into your work-life or you can access them to develop your skills and gain knowledge.

What to expect after submitting your CV:

• Initial phone interview (20 min)
• Technical interview (75-90 min)
• Decision and feedback

If you have any questions, get in touch with us!