VegPick — Three-App Grocery Delivery Ecosystem

E-Commerce VegPick (Internal Product) • 5 months • 8 engineers

The Challenge

Building a grocery delivery platform requires three distinct applications — customer storefront, vendor inventory management, and rider delivery tracking — that must operate in real-time coordination. The challenge was maintaining shared business logic across apps while handling concurrent order state transitions, live GPS tracking, and payment reconciliation.

Our Approach

We structured the project as a Flutter multi-app monorepo with shared packages for authentication, API clients, and common UI components. Each app has its own navigation and state management (BLoC pattern) while sharing data models and business logic. Razorpay integration handles UPI, card, and wallet payments with webhook-based reconciliation. Real-time order tracking uses Firebase Realtime Database for location updates pushed to customer apps at 5-second intervals. The Node.js backend manages order lifecycle state machines, vendor inventory sync, and rider assignment algorithms.

Tech Stack

Flutter Node.js MongoDB Firebase Razorpay SDK

Key Results

Three-app ecosystem launched within 5-month timeline

Real-time order tracking with 5-second GPS update intervals

Razorpay integration supporting UPI, cards, and wallets

Shared package architecture reducing cross-app code duplication by 60%

Features Delivered

Customer Storefront App

Vendor Dashboard App

Rider Delivery App

Real-time GPS Tracking

Have a Similar Project?

We can discuss how our experience applies to your specific requirements.

Other Case Studies

EdTech

AnzanPro — Building a Multi-Platform Digital Abacus Learning System

Traditional abacus learning relies on physical soroban manipulation, making remote instruction difficult. The core engineering challenge was replicating realistic bead physics and multi-touch gesture recognition across Android, iOS, and Web from a single codebase — while maintaining sub-100ms touch response to feel tactile rather than laggy.

PYQBank — Adaptive Exam Preparation with Spaced Repetition

NEET and JEE aspirants need structured access to 22,000+ previous year questions organized by chapter, topic, and difficulty — with a study system that adapts to individual retention patterns. Existing platforms offered static question banks without intelligent review scheduling or exam pattern analysis.

CabPool — Dual-Role Ride Sharing with Route Optimization

Unlike traditional ride-hailing apps with separate driver and passenger apps, CabPool allows any user to switch between driving and riding within the same application. This dual-role model requires real-time matching algorithms that consider both route overlap and schedule compatibility, along with a fare calculation engine that handles pooled ride splitting.