Usama Bin H.

Android, iOS & Flutter Developer | Kotlin, Swift, Dart | 1M+ Downloads

✅ Top Rated Mobile App Developer — Android, iOS & Flutter | 6+ Years | 100+ Projects I build native Android apps (Kotlin/Java), native iOS apps (Swift), and cross-platform apps with Flutter (Dart) — from initial concept through app store release. Over 6+ years, I've delivered 100+ projects with a 90%+ Job Success Score, working with clients across the US, UK, Germany, UAE, Singapore, and Saudi Arabia. My published apps have a combined 500,000+ downloads on Google Play. HOW I CAN HELP: - Build a new native Android or iOS app from scratch - Build a cross-platform app in Flutter — one codebase, both platforms - Take over, debug, or improve an existing app - Integrate APIs, payment gateways (Stripe/PayPal), Firebase, or push notifications - Handle full app store submission (Google Play & Apple App Store) WHY CLIENTS WORK WITH ME: ✅ 90%+ Job Success Score across 100+ delivered projects ✅ Full ownership — architecture, coding, testing, and store submission ✅ Clear communication in English, deadline-driven delivery ✅ Comfortable as a solo developer or embedded in a larger team TECH STACK: Android — Kotlin, Java, Jetpack Compose, MVVM/MVP, Dagger/Hilt, Room, WorkManager, Coroutines iOS — Swift, Xcode Flutter — Dart, Provider/Bloc, Firebase, REST APIs Shared — Firebase, SQLite, REST APIs, Google Maps, Push Notifications, Social Logins, In-App Purchases, AdMob Have an Android, iOS, or Flutter project in mind? Message me with your requirements — happy to discuss scope and timeline before you commit.