John Wilker

Frontend / Fullstack Developer building web and mobile products with React, Next.js, React Native and TypeScript.

End-to-end product builder — API, web dashboard and offline-first mobile.

Based in Brazil - open to remote roles in Europe and relocation with sponsorship.

Featured Projects

Two production-grade case studies with architecture docs, technical decisions, and real screenshots.

Construction workflow management: web dashboard, mobile app, budgets, payments (Mercado Pago, Pagar.me), and PDF generation.

Organic waste management: mobile app with offline sync, backend API, farms and leira measurements, Google Sheets integration.