Senior full-stack engineer shipping product work with React, Next.js, TypeScript, and Ruby on Rails.

I work across product interfaces, backend systems, and developer tooling, with a bias for practical delivery, clean architecture, and maintainable code.

• 10+ years building fintech, SaaS, Web3, and developer-facing products.
• Comfortable moving across frontend, Rails APIs, data workflows, and production UX details.
• Active in open-source contribution work across Ruby/Rails and modern TypeScript ecosystems.

Draftmora is my current flagship product, combining a local-first task board, chat, SQLite persistence, and a packaged npm CLI into a contributor-ready open-source app.

• Draftmora - shipped product repo for local-first task management and structured delivery workflows.
• FolioFlux - crypto portfolio tracking product work across market data, portfolio UX, and growth content.
• Personal site - freelance engineering profile, selected work, and writing.

• Rails - Action Mailbox and framework-level fixes with focused regression coverage.
• Ruby / Rubygems - runtime and tooling contribution work around small, reviewable fixes.
• OpenClaw - reliability and security-oriented fixes with real behavior proof.
• Next.js / TypeScript ecosystem - targeted framework and type-system contribution work.

React, Next.js, TypeScript, Ruby on Rails, Node.js, PostgreSQL, SQLite, Vite, Fastify.

If you need senior full-stack help for product work, launches, rebuilds, or delivery support, reach me through andriifurmanets.com or LinkedIn.