Senior Ruby on Rails Developer

We're looking for an experienced, pragmatic Senior Ruby on Rails Developer to take long-term ownership of key backend systems across our e-commerce platform. You'll play a central role in ensuring performance, scalability, and reliability as we continue to grow. From designing robust APIs to refining domain models and improving performance at scale, you'll help strengthen the technical foundation of a product-driven business., Contract: Full-time employee Team: Backend (5 developers), working closely with Frontend and Product Reports to: Head of IT, As a Senior Ruby on Rails Developer, you'll join our core backend team and contribute to the design, evolution, and maintenance of our platform's services. The role is focused on delivering scalable, clean, and maintainable backend systems, supporting both customer-facing features and internal operations., * API development: Design, implement, and maintain scalable REST APIs serving both internal and external clients

• Business logic & data modeling: Lead improvements to our domain models using ActiveRecord and PostgreSQL
• Performance optimization: Improve query performance, background job efficiency (Sidekiq), and caching strategies (Redis)
• Architecture ownership: Contribute to system design discussions and long-term architectural decisions
• Code quality: Write and maintain high-quality, well-tested code using RSpec, RuboCop, and SimpleCov
• Reliability & security: Apply secure coding practices and help strengthen our resilience, availability, and observability
• Cross-team collaboration: Work closely with product managers and frontend engineers to deliver features efficiently
• Knowledge sharing: Mentor team members and help raise the overall engineering bar

What Success Looks Like

• Consistently fast, reliable APIs
• Predictable delivery of scoped tasks with low bug rates
• Measurable performance improvements across services and background jobs
• Strong collaboration and communication within the backend and cross-functional teams
• Contributions that increase system stability and reduce operational overhead

We run weekly check-ins and maintain a steady async communication flow.

Our Stack & Tools

• Backend: Ruby on Rails, PostgreSQL, Sidekiq, Redis, REST APIs
• Testing & Quality: RSpec, RuboCop, SimpleCov
• Infrastructure: Heroku, Docker, CircleCI
• Collaboration: Jira, Slack, Bitbucket, Figma

• Strong experience building and maintaining production Rails applications
• Solid knowledge of PostgreSQL, relational modeling, and performance tuning
• Experience with background job processing and caching layers
• A pragmatic mindset - balancing engineering quality with business needs
• Comfortable owning features end-to-end
• Clear communication and the ability to collaborate effectively in a remote environment
• Located within European time zones (or willing to align)