Wasey — Food Multi-Vendor Delivery Platform

Wasey is an on-demand food delivery platform that unifies customers, restaurants, couriers, and platform administrators into a cohesive real-time operations engine.

Instead of treating each user touchpoint in isolation, the architecture models the full fulfillment lifecycle across four specialized interfaces: a consumer app for discovery, customization, and checkout; a restaurant partner app for kitchen order queueing and prep alerts; a courier app with turn-by-turn navigation and live telemetry; and a centralized web dashboard for platform governance, menu catalog management, and dispute handling.

Lead Flutter engineer responsible for the cross-platform mobile client architecture on Android and iOS, real-time Firebase state synchronization, Google Maps Platform integration (Directions, geocoding, and driver telemetry), push notification workflows (FCM), and end-to-end order lifecycle coordination across all three client applications.

• Three specialized Flutter clients (Customer, Courier, Vendor) sharing domain models, API repositories, and validation rules across iOS and Android.
• Firebase Firestore and Realtime Database operate as the real-time event bus, streaming sub-second order lifecycle events and courier GPS coordinates.
• Google Maps Platform integration with polyline decoding, marker interpolation, and bearing calculation for smooth real-time courier tracking without UI jank.
• High-priority Firebase Cloud Messaging (FCM) push pipeline paired with localized persistent audio alerts for rapid kitchen order acceptance.
• Centralized Web Admin portal managing multi-vendor onboarding, commission structures, catalog indexing, delivery zones, and customer support.

• Multi-Restaurant Discovery & Menus: Search local vendors, browse categorized digital menus with item customizations, modifiers, and cart validation.
• Real-Time Courier Telemetry & Dynamic ETA: Live courier vehicle movement rendered on interactive Google Maps with route polylines and updated arrival estimates.
• Courier Dispatch & Turn-by-Turn Navigation: Instant delivery offer broadcasting, one-tap accept/decline flows, and in-app navigation routes for pickup and drop-off.
• Kitchen Partner Order Management: Visual order queue with acoustic alerts, adjustable preparation times, and instant dispatch triggers.
• Synchronized Order State Machine: Strict status lifecycle (Placed → Accepted → Preparing → Out for Delivery → Completed) verified across all client apps.
• Web Administration & Platform Operations: Merchant onboarding, commission management, menu moderation, and platform-wide order oversight.

• Multi-Actor State Concurrency: Coordinated asynchronous state changes across three apps simultaneously, ensuring customer cancellations, kitchen delays, and courier reassignments never leave orphaned orders or inconsistent UI states.
• Battery-Efficient Live GPS Telemetry: Designed background location streaming on Android and iOS that throttles coordinate broadcasts, smooths position jitter, and maintains accurate client-side bearing without draining courier device batteries.
• Resilient Offline & Reconnection Handling: Implemented optimistic UI feedback and automatic exponential backoff retries so courier status updates and customer tracking survive intermittent cellular dead zones.
• Audible Notification Guarantees: Configured high-priority FCM background channels with distinctive, repeating acoustic alerts to overcome noisy kitchen environments and ensure immediate merchant order acceptance.

• Production customer application launched on Google Play and Apple App Store, alongside dedicated live Driver application on Apple App Store.
• Live brand and product web platform deployed at waseyapp.com.
• Delivered three distinct mobile applications from a unified Flutter engineering strategy, significantly accelerating feature releases and code maintainability.
• Built a resilient real-time foundation capable of synchronizing order states and live GPS location streams seamlessly across distributed actors.