// the problem
Traditional auction platforms suffer from latency issues where users don't see bid updates in real-time, leading to poor user experience and unfair bidding outcomes.
// the solution
Built a WebSocket-powered architecture using Socket.io that broadcasts bid events instantly to all connected clients. Combined with automated lifecycle management using cron jobs for auction expiry, cleanup, and winner determination.
// architecture
// features
Real-time bid updates via WebSocket (Socket.io)
JWT authentication with secure session management
Razorpay payment integration for seamless transactions
Automated auction lifecycle (start, expire, finalize winner)
Background cron jobs for cleanup and expiry handling
Concurrent bidding support with race condition handling
// challenges & learnings
Handling race conditions when multiple users bid simultaneously
Designing reliable auction expiry with background cron jobs
Integrating Razorpay payment flow with auction winner determination
Check out the code on GitHub or try the live demo.