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Multi-App Architecture Delivered Multi-App Architecture

Marketplace, Quick-Commerce & Service Platform

3 Mobile Apps (Customer, Rider, Provider) + Web Frontend + Node/Postgres Dark-Store Inventory & Task State Machines.

Mobile & Logistics EngineeringOn-Demand Commerce Platform
Operational Context

The Business Challenge

Quick-commerce and on-demand service marketplaces require orchestrating multiple distinct user groups — customers ordering products, warehouse teams fulfilling orders, delivery riders transporting goods, and service providers fulfilling requests — with zero inventory drift and real-time status visibility.

Engineering Implementation

Solution & Systems Architecture

Engineered an interconnected multi-application ecosystem comprising a web frontend, three distinct native-quality mobile apps built with React Native and Expo (Customer App, Rider App, Service Provider App), and a Node.js/Express backend. Designed PostgreSQL schemas and database migrations supporting dark-store inventory, quick-commerce orders, order items, picking tasks, and packing state machine tasks.

Interconnected System Layers
  • Mobile Applications: 3 separate React Native / Expo apps with shared component libraries
  • Backend APIs: Node.js / Express REST API with structured order lifecycle state transitions
  • Data Model: PostgreSQL schemas covering dark-store inventory, picking tasks, and order items
  • Fulfillment Logic: Automated task assignment routing orders from store picker to delivery rider
Verified Delivery

Production Outcomes & Capabilities

  • Engineered multi-app ecosystem coordinating 3 distinct mobile user experiences
  • Dark-store warehouse picking and packing workflows digitized with state machine transitions
  • Robust relational PostgreSQL data modeling with automated schema migrations
  • Unified REST API serving web storefront, warehouse pickers, and mobile delivery fleets
Technology Stack
React NativeExpoNode.jsExpressPostgreSQLDark-Store WMSMobile Apps
Operational Status
Multi-App Architecture

Deployed in a live operating environment with hands-on infrastructure monitoring and maintenance.

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