EventGate

The problem

Event organizers often sell tickets through WhatsApp and DMs with no central record, then face slow, error-prone manual check-in at the door with real crowds waiting.

What was built

A ticketing platform with Paystack checkout, tiered ticket types, and a scanner app for door staff that validates and checks in tickets by QR code in under a second, offline-capable for venues with poor signal.

Notable engineering

• QR check-in scanner works offline and syncs scan records once connectivity returns, preventing double-entry at the door
• Ticket issuance is idempotent against Paystack webhook retries so a payment can never mint two tickets
• Real-time sold/checked-in counts for organizers without refreshing a dashboard by hand