· Mississauga, Ontario
I build full-stack SaaS products, from the database and API to the screens people use every day. I have 8+ years of experience, mostly with Ruby on Rails, React and PostgreSQL, across fintech, e-commerce, warehouse logistics and HR tech.
- Backend: Ruby on Rails, REST APIs, background jobs (Sidekiq, Redis) and third-party integrations
- Frontend: responsive, data-heavy apps with React, Next.js and TypeScript
- Desktop: cross-platform apps with Rust and Tauri
- Databases: PostgreSQL data modeling, query tuning and indexing
- Infrastructure: AWS, Docker and CI/CD with GitHub Actions
- Code quality: automated tests (RSpec), code reviews and clear documentation, with AI tools like Claude Code in my daily workflow
- Email: hi.hasannadeem@gmail.com




