Supermarket Full-Stack E-commerce Platform

For SUPERMARKET – FULL-STACK QUICK COMMERCE PLATFORM

We need a production-ready Blinkit-style grocery platform with 4 connected modules:

1. CUSTOMER APP – OTP login, location, categories, search, products, cart, coupons, checkout, COD/online payment, delivery slots, order tracking, history and notifications.

2. STORE APP – receive/process orders, manage products, categories, prices, discounts, stock, low/out-of-stock items and inventory updates.

3. DELIVERY APP – login, online/offline status, receive/accept orders, store pickup, GPS/maps, delivery tracking, OTP confirmation and delivery history.

4. SUPER ADMIN/CRM – complete control over customers, orders, inventory, stores, delivery partners, payments, revenue, offers, reports and full order timelines.

Backend must securely connect everything with role-based access, server-side validation, real-time order/inventory sync and stock-conflict protection. Prefer React/Next.js, React Native/Flutter, Node.js and PostgreSQL/Supabase.

Need complete source code, deployment, documentation and testing.

Freelancer should provide relevant portfolio, proposed stack, timeline, fixed/milestone cost and support.