Overview
Promokna.online is a Software-as-a-Service platform for managing large events. It covers multi-tenant event pages, automated registration payments, and on-site ticket operations. Each organizer manages registration pages, ticket quotas, and participant data independently.
What the platform handles
- Multi-tenant architecture. Organizers run their own registration pages, ticket quotas, and participant data without sharing a single admin view.
- Payment gateway integration. Registration payments are verified automatically and electronic tickets are issued after confirmation.
- Barcode check-in. Staff scan barcode or QR tickets at the venue to verify attendance without long queues.
- Scale. The platform has operated 9+ events with more than 3,000 participants.
Challenges
The first serious traffic spike exposed a shared-hosting limit. A burst of more than 20k requests took the server down. Along with upgrading the shared-hosting package, I changed the runtime configuration. Sessions moved to cookies, cache moved to files, analytics was disabled during the peak, and global plus per-user rate limits were added.
The global limit caps total traffic. The per-user limit reduces the risk of one client exhausting the server. When a request hits the limit, the platform serves an informative queue page instead of a technical server error.
Midtrans payment notifications sometimes arrived late or were missed. Shared hosting cannot keep a permanent queue worker or scheduler, so I added an Artisan fallback command that expires unpaid registrations after a fixed cut-off. A cron job runs the command and keeps ticket state consistent.
Stack
Laravel, MySQL, TailwindCSS, and Alpine.js.