Senior Native Android Developer with 9+ years of experience building high-performance Kotlin applications. I specialize in Native Android App Development, Jetpack Compose, and clean MVVM architecture to build scalable, bug-free mobile apps
Top Rated on Upwork with 100% Job Success across 48 projects โข 9+ years building production Android apps.
When clients hire me, it's usually for one of four reasons:
- They need a new Native Android app built with Java or Kotlin.
- Their existing app has become difficult to maintain, slow, or outdated and requires an app refactor.
- They need AI features integrated into an existing mobile app like Gemini or ChatGPT.
- They need someone who can take ownership of a complex mobile app codebase.
High-Impact Wins:
- ๐๐๐๐ฅ๐๐ ๐ฉ๐ซ๐จ๐๐ฎ๐๐ญ๐ข๐จ๐ง ๐๐ง๐๐ซ๐จ๐ข๐ ๐๐ฉ๐ฉ๐ฌ with 10M+ combined Google Play downloads, focusing on performance, maintainability, and long-term scalability.
- ๐๐จ๐๐๐ซ๐ง๐ข๐ณ๐๐ ๐ ๐๐๐๐+ ๐๐๐ ๐๐๐ฏ๐/๐๐๐ ๐๐จ๐๐๐๐๐ฌ๐ (40+ screens) by migrating it to Jetpack Compose, MVVM, Hilt, Coroutines, and Flow for an app serving 1M+ users.
- ๐๐ง๐ญ๐๐ ๐ซ๐๐ญ๐๐ ๐๐-๐ฉ๐จ๐ฐ๐๐ซ๐๐ ๐ฆ๐จ๐๐ข๐ฅ๐ ๐๐๐๐ญ๐ฎ๐ซ๐๐ฌ using LLM APIs, TensorFlow Lite, and MediaPipe, bringing intelligent capabilities directly into Android applications.
- ๐๐ฉ๐ญ๐ข๐ฆ๐ข๐ณ๐๐ ๐๐ฉ๐ฉ ๐ฉ๐๐ซ๐๐จ๐ซ๐ฆ๐๐ง๐๐ ๐๐ฒ ๐ซ๐๐๐ฎ๐๐ข๐ง๐ ๐ฌ๐ญ๐๐ซ๐ญ๐ฎ๐ฉ ๐ญ๐ข๐ฆ๐ by 15% using Baseline Profiles, Macrobenchmark, and Android performance profiling.
- ๐๐๐ฏ๐๐ฅ๐จ๐ฉ๐๐ ๐ก๐๐ซ๐๐ฐ๐๐ซ๐-๐๐จ๐ง๐ง๐๐๐ญ๐๐ ๐๐ง๐๐ซ๐จ๐ข๐ ๐ฌ๐จ๐ฅ๐ฎ๐ญ๐ข๐จ๐ง๐ฌ ๐ฐ๐ข๐ญ๐ก ๐๐๐, RFID, and POS device integration, enabling seamless communication with external devices.
- ๐๐๐ ๐๐จ๐๐ข๐ฅ๐ ๐๐ง๐ ๐ข๐ง๐๐๐ซ๐ข๐ง๐ ๐ญ๐๐๐ฆ๐ฌ, ๐๐ซ๐ข๐ฏ๐ข๐ง๐ ๐๐ซ๐๐ก๐ข๐ญ๐๐๐ญ๐ฎ๐ซ๐ ๐๐๐๐ข๐ฌ๐ข๐จ๐ง๐ฌ, code quality, feature delivery, and production releases for large-scale applications.
๐ ๐ฅ๐ฎ๐ญ๐ญ๐๐ซ & ๐๐ซ๐จ๐ฌ๐ฌ-๐๐ฅ๐๐ญ๐๐จ๐ซ๐ฆ:
Flutter is my second specialization alongside Native Android. I build production-ready Flutter applications, modernize existing codebases, implement complex features, and optimize apps for long-term scalability.
My deep Android expertise allows me to handle advanced native integrationsโincluding platform channels, custom plugins, third-party SDKs, BLE/hardware connectivity, AI/LLM features, and performance optimizationโmaking me a strong choice for Flutter projects that go beyond standard app development.
๐ป MY TECHNICAL STACK
โข Frameworks & Cross-Platform: Flutter, Jetpack Compose, SwiftUI
โข Programming Languages: Dart, Kotlin, Swift, Java
โข Asynchronous Programming & State Management: Bloc, Provider, Coroutines
Android & Jetpack: Jetpack Compose, Compose Multiplatform (CMP), Kotlin Multiplatform (KMP), XML Views, Android SDK, Material Design 3, ViewModel, Navigation, Room, DataStore, Paging 3, WorkManager
Architecture & Patterns: Clean Architecture, MVVM, MVI (Model-View-Intent), Modularization, SOLID, OOP
Asynchronous & Reactive: Kotlin Coroutines, Flow, LiveData, Events
AI / ML: TensorFlow Lite, On-Device ML, LLM & AI API Integration
Dependency Injection: Hilt, Koin, Dagger
Networking: Retrofit, Ktor, OkHttp, REST APIs, WebSockets
DevOps & Testing: CI/CD, Jenkins, JUnit, MockK, Espresso
Security: SSL Pinning, EncryptedSharedPreferences, ProGuard/R8 (Code Obfuscation), Secure Data Storage
APIs & Tools: REST, GraphQL, Mapbox SDK, ExoPlayer, Git, Firebase (Crashlytics, FCM) , Baseline Profiles
Iโm looking for real engineering tasks and NOT VIBE CODING TASKS. If you need someone who can take ownership of your Android or Flutter appโfrom architecture and development to optimization and release - letโs talk.
Noman S.
Full-Stack Developer | Laravel, Next.js | Flutter, Kotlin, Swift
Dhaka, Bangladesh
$20/hr$20 per hour5.0 (10) 21 jobs $8K+ total earnings
I build the whole product as one person: API, admin panel, website, and the mobile apps. Clients hire me when they're tired of stitching together a backend dev, a web dev, and an app dev who've never met.
Web: Laravel, Next.js, React, Vue, TypeScript, MySQL/Postgres, Stripe, AWS.
Mobile: Flutter when one codebase should ship both stores; native Kotlin and Swift when the platform deserves it; Kotlin Multiplatform when logic should be shared.
Recent work: migrated DollarDaily, a live donation platform with recurring payments, from legacy PHP to Laravel with zero downtime. Shipped Subtrak, ZeroHour, and HangUp to the App Store and Play Store.
I work best with clients who treat me as an engineering partner, not a ticket-closer. I communicate proactively, flag risks early, and write code the next developer won't curse at.
Available for full builds (site + app together), MVPs, and inherited codebases.
Syed Faysal H.
Flutter Developer | Building iOS & Android apps with responsive design
๐ฐโ๐ ๐ ๐ญ๐๐๐๐๐๐ ๐ซ๐๐๐๐๐๐๐๐ ๐๐๐ ๐๐๐๐๐ ๐ ๐๐๐๐๐๐๐๐๐, ๐๐๐๐, ๐๐๐ ๐๐๐๐๐๐๐๐๐๐ ๐๐๐๐๐๐. ๐ฐ ๐๐๐๐๐๐ ๐๐๐๐ ๐๐๐๐ ๐๐๐๐ ๐๐๐๐๐๐๐๐๐ ๐๐ ๐จ๐๐ ๐๐๐๐ ๐๐๐ ๐๐ถ๐บ ๐๐๐๐๐ ๐๐๐ ๐๐๐๐๐ ๐ญ๐๐๐๐๐๐ ๐๐๐ ๐๐๐๐๐.
My goal is to help businesses launch high-quality apps that look great, work perfectly, and grow their brand.
๐๐ก๐๐ญ ๐ ๐๐จ
โบ๏ธ Build mobile apps for Android, iOS using Flutter
โบ๏ธ Convert Figma/XD designs into real Flutter UI
โบ๏ธ Connect apps with Firebase or Django REST API
โบ๏ธ Add Google Maps and Push Notifications
โบ๏ธ Implement Login, Signup, and Payment systems
โบ๏ธ Manage app data with Firestore, Hive, or Sqflite
โบ๏ธ Create responsive layouts for all screen sizes
โบ๏ธ Publish apps to Play Store and App Store
โบ๏ธ Fix bugs, improve performance, and update old apps
๐๐ก๐ฒ ๐๐ฅ๐ข๐๐ง๐ญ๐ฌ ๐๐ก๐จ๐จ๐ฌ๐ ๐๐
โบ๏ธ 4+ years of Flutter experience (Android, iOS).
โบ๏ธ Clean and maintainable code structure and update anytime.
โบ๏ธ Smooth, modern, and user-friendly UI/UX.
โบ๏ธ Fast, secure, and optimized performance to development and future updates..
โบ๏ธ Full project support from start to finish.
โบ๏ธ On-time delivery with clear communication.
๐ฒ๐๐ ๐ฌ๐๐๐๐๐๐๐๐
โ Design to Code:
Flutter UI/UX conversion with pixel-perfect design accuracy.
โ State Management:
BLoC, GetX, and Provider for scalable, maintainable, and reactive app architectures.
โ Backend & APIs:
Integration with Firebase Firestore, Django RESTful APIs, and Cloud Messaging for real-time and secure app functionality.
โ Auth & Integrations:
Firebase Authentication, OAuth, and third-party API integrations for seamless login and data flow.
โ Advanced Features:
Google Maps SDK, AdMob ads, In-App Purchases (IAP), and Push Notifications implementation.
โ Offline Storage:
Local database setup using Sqflite, Hive, and Shared Preferences for smooth offline support.
โ Theming & Localization:
Light/Dark mode, beautiful animations, and multi-language localization for global user experience.
๐๐ก๐๐ญ ๐ ๐๐๐ง ๐๐ฎ๐ข๐ฅ๐ ๐๐จ๐ซ ๐๐จ๐ฎ:
โข Cross-platform mobile apps using Flutter
โข Integrate REST APIs or custom backend services
โข Build responsive and modern user interfaces
โข Connect apps with local or cloud databases
โข Deliver bug-free and optimized performance
โข Smooth performance on all devices
โข On-time project delivery
โข Clear communication and updates
Keywords:
Flutter App Developer | Flutter Firebase | Flutter |Flutter and Dart Expert | Android & iOS App Builder | Cross-Platform Mobile Development | Uber Clone Developer | Ride Sharing App | On-Demand Service App | Google Maps SDK Integration | Flutter Location Services | Real-Time GPS Tracking | REST API Integration | Backend Integration | Firebase Auth & Firestore | Push Notification Setup | Flutter Socket Integration | Flutter State Management (Provider, BLoC, GetX) | Responsive UI/UX in Flutter | Flutter App Optimization | Secure Flutter App Development | Flutter Payment Gateway Integration | Flutter + Django | Flutter + Firebase | Clean Code Architecture | Mobile App Testing | Flutter App Deployment | Play Store Publishing | App Store Submission | Flutter App Maintenance | Custom Flutter Widgets | Modern Flutter Design System | Flutter App for Startups | Agile Flutter Developer | Fast Delivery Flutter Projects | Flutter Developer |
Tanjim A.
Senior Flutter Developer | Clean Architecture & Mobile Systems Expert
I have been building for the mobile ecosystem for over five years. My journey began here on Upwork in 2020, where I established my foundation as a Top Rated developer. Since then, I have focused on refining my craft, moving from building simple interfaces to architecting complex, high-performance mobile systems for iOS and Android.
I specialize in Flutter and Dart, with a deep emphasis on technical discipline and long-term maintainability. I don't just write code, I build apps that are organized, scalable, and easy to manage as they grow.
What I bring to your project:
Architectural Integrity: I am a firm believer in Clean Architecture and robust state management (using BLoC or Riverpod). I write modular, testable code that ensures your app remains stable long after the initial launch.
Senior Technical Expertise: I have extensive experience implementing complex features, including GPS and location services, real-time data processing, and secure payment integrations.
Native Integration: With a strong background in Swift and Kotlin, I can handle deep native integrations that standard cross-platform developers often struggle with.
Reliability: Having spent years in this industry, I understand that clear communication and technical honesty are just as important as the code itself.
If you are looking for a senior developer who values quality, architecture, and a focused approach to problem-solving, I would love to discuss how I can help bring your idea to life.
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