After months of building, I just released Zesto — a production-ready,

multi-city food delivery platform inspired by Zomato and Swiggy.

It consists of 4 Flutter apps backed by a Firebase backend with 23

Cloud Functions. In this article I'll walk through the key architecture

decisions I made along the way.

What I Built

Customer App — OTP login, restaurant discovery, cart, Razorpay payments, live driver tracking

Driver App — automatic job assignment, step-by-step delivery slider, background GPS

Restaurant App — live order dashboard, menu management, earnings

Admin Panel — Flutter Web, multi-city, restaurant and driver management

Demo: https://youtube.com/shorts/rL2M5O5Tk50

Architecture Overview

All 4 apps share a single Firebase project.…