Manoj J.

👋 React Native Developer | Expo | MERN | iOS & Android 🚀 6.5+ years building and shipping production-ready iOS & Android apps with React Native, JavaScript/TypeScript, Expo, and MERN. I build products for startups that need more than a throwaway MVP, especially map-heavy apps, offline-first systems, realtime features, complex mobile workflows, and reliable App Store / Google Play releases. ⭐ WHY WORK WITH ME? 🍎 iOS & Android — Production apps shipped to both stores ⏱️ 3,600+ Upwork hours — Long-term product development across mobile, web, and backend 🗺️ Maps & Location — GPS, geofencing, background location, and map-heavy workflows 📡 Offline-first — Local data, sync strategies, and large datasets ⚡ Performance — List optimization, rendering, memory, and app responsiveness 🔄 Realtime — WebSockets / Socket IO, multiplayer, and live features 🧩 Full-stack — React Native + React + Node.js + Express + MongoDB 🤖 AI-assisted development — AI coding agents for implementation, testing, refactoring, and automation, while I own the architecture and production decisions 🛠️ RECENT WORK 🌎 GeoSmarts React Native · MERN · Socket IO • 3D globe and interactive map experiences • Quizzes and multiplayer games • Teacher/student classroom application • Realtime communication and game workflows 🗺️ Eat Vermont React Native · React · Node.js • Map-based discovery platform • Trails, events, and local experiences • Offline member perks • Built around 2,000+ local businesses and 100K+ community members 📱 L'Oreal Access IN React Native • 100K+ Google Play downloads • 4.3★ App Store rating • Firebase Analytics & Crashlytics • Push notifications • Agora live meeting improvements • Product-list performance optimization 📍 Oorjaa React Native • Live GPS tracking • Geofencing • Background location • Delivery-partner workflows 💻 TECH STACK Mobile: React Native · Expo · TypeScript · JavaScript State & Data: Redux Toolkit · React Query · Firebase Backend: Node.js · Express · REST APIs · MongoDB Realtime: WebSockets · Socket IO Location: Maps · GPS · Geofencing · Background Location Engineering: Performance Optimization · Offline Sync · CI/CD · App Store Deployment 🤖 HOW I USE AI I use AI coding agents as engineering accelerators — not as a replacement for engineering judgment. They help with: • Implementation and boilerplate • Test generation • Code review • Refactoring • CI/CD automation I remain responsible for architecture, technical decisions, code quality, security, performance, and what ultimately ships to production. 🤝 HOW I WORK I can: → Join an existing React Native codebase → Build new mobile features from scratch → Fix bugs and performance bottlenecks → Handle React + Node.js backend work when needed → Prepare and release apps to Apple App Store & Google Play → Stay involved for ongoing maintenance and improvements You’ll get clear communication, regular updates, and honest technical feedback. If a requirement is likely to hurt performance, scalability, or the next release, I’ll tell you before it becomes a problem. 📩 LET'S TALK If you need a React Native Developer who can handle the MERN stack, move quickly with AI-assisted development, and still ship production-quality software carefully, send me the project details. I’ll quickly tell you whether I’m a good fit.