Developer Builds Zero-Commission QR Dining System with Real-Time Kitchen Display Sync

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A developer has created DineFlow, a multi-tenant digital dining platform aimed at removing third-party delivery aggregator commissions of 15 to 25 percent for restaurants. The system lets diners scan a table QR code and place orders instantly through a zero-install web app, without downloading an app or creating an account. Orders are pushed to the kitchen display in under 50 milliseconds using Supabase PostgreSQL Realtime and MQTT rather than polling, and the platform is built with vanilla JavaScript instead of heavy frameworks to keep load times low on slow connections. The author also describes a Service Worker for offline resilience in areas with weak signal, plus a dual-device demo that uses the BroadcastChannel API to simulate guest and kitchen screens side by side.

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