João Paulo Effting

A laundry booking board for apartment buildings — pick a machine, pick a slot, watch the calendar update live as neighbors book too. Next.js + Supabase, TanStack Query with optimistic booking, Postgres-constraint-safe double-booking prevention.

Strava, but for reading — time a session, get a shareable stat card. No sign-up, no backend.

A Pokédex-style coffee shop collection game for Stockholm — visit real cafes, mark them collected, watch your album fill in. Next.js + Supabase, Leaflet map with live geolocation.

A Wattpad-style platform for serialized fiction — write, publish, and discover stories chapter by chapter. Full-stack solo build: Next.js, Supabase (Postgres/Auth/RLS/Storage), TypeScript.

Learning supabase and next 16

Trying out a Multi-step form using react-hook-forms with uncontrollable inputs.