A production-grade cross-platform mobile application connecting vehicle owners with certified mechanics in real time, featuring live GPS tracking, secure Razorpay payments, and an architecture capable of sustaining 10,000+ concurrent active sessions.
Vehicle owners in tier-2 cities faced a fragmented, offline market for roadside repairs — no live tracking, unreliable pricing, and zero digital payment support. The client needed a complete two-sided marketplace (drivers + mechanics) shipped in under 30 days with enterprise-grade reliability.
Real-time GPS tracking of mechanics requires sub-200ms location sync without draining device batteries or overloading Firestore write quotas.
Implemented delta-update location broadcasting — mechanic positions streamed only when movement exceeds 15m threshold, reducing Firestore writes by 78%.
Dual app (customer + mechanic) needed consistent UI/UX with zero code duplication across iOS and Android from a single codebase.
Architected a shared Flutter module system with role-based navigation trees — 92% code shared between customer and mechanic apps, separate build flavors.
A clean three-layer architecture separating presentation, business logic, and data layers. Firebase powers all real-time features while Google Maps SDK handles the live tracking interface.
Real-time GPS tracking of assigned mechanic on Google Maps with ETA calculation and smooth polyline path rendering.
End-to-end encrypted Razorpay integration with automatic invoice generation and Firebase Cloud Function webhooks.
Post-service rating system with mechanic reputation scores, customer reviews, and service history logs.
Firebase Cloud Messaging with order status events, mechanic arrival alerts, and payment confirmations.
Frictionless phone OTP authentication via Firebase Auth. No passwords. Automatic session persistence.
Real-time admin panel to monitor active bookings, mechanic availability, revenue analytics, and dispute resolution.
FixMate launched 2 days ahead of the 30-day deadline with zero critical bugs in production. The dual-app architecture (customer + mechanic) was fully validated through beta testing with 200+ users across 3 cities before the public launch.
We'll scope, design, and engineer your mobile app in 30 days — with daily updates and a money-back guarantee.