I’m a product-focused full-stack developer from Poland with a background in Ruby on Rails, JavaScript, and TypeScript. I do my best work in small, autonomous teams — where I can own problems end-to-end, simplify complexity, and ship meaningful features.
Beyond the code, I write about software, productivity, and team workflows on jmatuszewski.com. I also stay active with long-distance running, rock climbing, and volunteering.
If you care about ownership, simplicity, and building useful software — I’d love to connect.
- Ruby / Rails / Turbo / Stimulus.js
- JavaScript / TypeScript / React
- PostgreSQL, Redis
- Docker, Kamal, GitHub Actions, Linux
- Ownership over tasks and results
- Calm, asynchronous workflows
- Focused, deep work
- Writing clear, maintainable code
- Solving real user problems
- Rails – Rewrote the Rails 7 Asset Pipeline Guide
- Chatwoot – Improved test performance in the Report Builder
- react-autolinker – Bugfix for link handling
- VS Code: Rails Test Runner – Built a Rails test runner extension for VS Code
- Remote-only
- Independent or team-based work
- Tech focus: Ruby, Rails, JS, TypeScript
- Contracting (B2B) or long-term collaboration
- 🖥️ jmatuszewski.com
- 🐙 @matuszewskijan
- 📬 Email me