Pagoda App (Flutter)

Highlights

• ▹Flutter engineering: Melos monorepo split by domain (home / catalog / trade / group-buy / fulfillment / profile) with shared UI Kit, network, and analytics packages
• ▹Trade consistency: stock reservation countdown, spec and price validation; payment confirmed by webhook plus active polling with a local order state machine and idempotency keys
• ▹Group-buy engine: open / join / success / failure-rollback state machine with dedicated stock pools, countdowns, and share loops; optimistic locks and API idempotency for consistency
• ▹Next-day fulfillment: cut-off times, delivery waves, serviceable slots, and address reachability; order nodes refreshed via long connection or polling with exception alerts
• ▹Multi-warehouse/multi-store: location and Geofencing fences auto-match a store or warehouse; switching stores invalidates repository caches and refreshes availability, stock, shipping, and lead time
• ▹Unified price pipeline: item price → promotions → shipping/packaging → payable with reusable rule components so client and server reconcile

Stack