Engineering a Real-Time Collaborative Editor with Supabase

As a developer who values the "Build → Break → Optimize" philosophy, I wanted to tackle one of the hardest problems in web development: Real-time Concurrency. I built BitPad , a collaborative code editor where developers can create rooms and code together in live-sync. The backbone of this entire system? Supabase. Why Supabase? Instead of managing a complex WebSocket server manually, I leveraged Supabase's Realtime engine . This allowed me to focus on the user experience while the infrastructure handled the heavy lifting of syncing state across multiple clients. The Technical Stack: Database & Realtime : Supabase (Postgres) for instant data broadcasting. Frontend : Next.js and Tailwind CSS for a lean, high-performance UI. Architecture : A room-based system where every keystroke is synchronized across all connected peers. The Challenge: Managing State at Scale The hardest part of building BitPad was ensuring that the "Room" state didn't become a bottleneck. By using Supabase's row-level