DropGoMart

The problem

Small local vendors have no affordable way to reach customers who want delivery, and independent dispatch riders have no efficient way to find and batch nearby jobs.

What was built

A three-sided marketplace: a vendor storefront and order management app, a customer ordering app, and a rider app with batched, route-aware job assignment.

Notable engineering

• Rider job assignment that batches nearby orders by route rather than dispatching one rider per order
• Offline-tolerant rider app that queues status updates and syncs once signal returns
• Idempotent order state machine so a dropped connection during checkout can't create duplicate orders