Enterprise-Grade Engineering.
Local Operational Excellence.

Engineered to scale horizontally. Each tenant gets an isolated schema so one client's data can never be read across a tenant boundary, while a service worker maintains a local IndexedDB replica — the point of sale keeps taking orders through a network dropout and reconciles automatically on reconnect.

Designed around least-privilege access. Every endpoint resolves the caller's role before touching patient data, and audit rows are written for each read of a clinical record. Composite indexes keep patient-history and billing lookups responsive as the record count grows.

The interesting problem here is concurrency, not scale. Two gates scanning the same forged QR code within milliseconds must produce exactly one admission, so redemption runs inside a database transaction that locks the ticket row before flipping its state.

Built for read-heavy traffic on mobile connections. Merchant photo uploads are re-encoded to WebP by a background worker rather than on the request path, and hot catalogue reads are served from Redis so a traffic spike on one storefront does not degrade the rest of the marketplace.