Usman N.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

Need a mobile app that works reliably in the real world, with the backend to support it? I'm a Technical Lead and Senior Mobile Engineer with 8+ years of experience. I build native Android, React Native and Flutter apps, plus the Spring Boot APIs behind them. I've shipped apps for healthcare, fintech, IoT, logistics, ride-hailing and streaming, and several are live on Google Play. I can take your project from idea to Play Store/App Store release, or join your team and fix the hard problems. WHAT I CAN BUILD FOR YOU Native Android apps in Kotlin/Java with Jetpack Compose, MVVM and Clean Architecture Cross-platform apps in React Native or Flutter: one codebase for iOS and Android Spring Boot backends: REST APIs, microservices, PostgreSQL, JPA, authentication Real-time features: chat, audio/video calls (WebRTC), Socket .IO, live location tracking Bluetooth/BLE and IoT apps: smart lighting, iBeacon indoor navigation, BLE scales On-device AI: OCR, ID card scanning, face liveness, YOLO detection, offline LLMs Payments (Stripe, PayPal, local gateways), Google Maps, Firebase, push notifications Rescue work: fixing crashes, slow apps, messy code and stalled projects RECENT WORK Impilo, a government healthcare platform: I led the whole cross-platform team (Android, React Native, Electron). It covers biometric login, doctor video calls, chat, pharmacy and billing. I built Spring Boot microservices for fingerprint authentication and an SMS gateway over a secure VPN. Ride-hailing platform: Uber-style rider and driver apps with live tracking. Mobile money app: Naira ↔ USD transactions and e-commerce, live on Google Play. IoT lighting app: controls up to 1,000 lights over Bluetooth mesh. Livestock BLE app: weighs whole herds over Bluetooth with cloud sync. IPTV/VOD streaming apps with EPG, live on Google Play. WHY CLIENTS WORK WITH ME ✔ 8+ years of shipping production apps, not just prototypes ✔ Full-stack mobile: app and backend from one developer, so there's no blame game ✔ Clear communication, regular progress updates and honest timelines ✔ Clean, documented code that your future developers can maintain ✔ Comfortable leading teams or working solo ✔ AI-assisted workflow (Claude, Copilot, Cursor) for faster delivery without cutting corners Send me a message with your idea, even if it's rough. I'll reply with practical suggestions on approach, timeline and cost, with no obligation.