John Wilker
Frontend / Fullstack Developer
Building scalable web and mobile applications.
ReactNext.jsTypeScriptReact NativeNode.jsPostgreSQL
Featured Projects
Case studies with architecture and technical overview.
Constru Platform
Construction workflow management: web dashboard, mobile app, budgets, payments (Mercado Pago, Pagar.me), and PDF generation.
View detailsComposting Platform
Organic waste management: mobile app with offline sync, backend API, farms and leira measurements, Google Sheets integration.
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