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I'm a professional Android Developer having 4+ years of experience in Native Android Development. I have worked for some popular clients including VISA, Pepsi, Lenovo, Adobe, HP, Pinterest, Cloudflare, Warner Brothers, and many others. I know both Kotlin and Java for Android App Development. I prefer using MVVM and MVI architecture for building Android apps. For the UI, I can use both Jetpack Compose and XML (with two-way DataBinding) for your apps. For clear separation of concerns, code maintainability, and fast build times, I use a multi-modular approach for Android Projects. I always make sure to write Unit Tests, UI Tests, and Integration Tests for all the code. For Jetpack Compose projects, I use layout debugging and layout inspection to make sure there are no unnecessary recompositions. This makes sure your apps run as fast as possible. I have great experience in Version Management tools including Git and GitHub. I have extensive experience working in cross-functional teams where I have interacted with people from different regions all over the world. I have excellent communication skills.

Are you looking for a reliable Android App Developer who delivers clean, scalable, and production ready Android applications on time, every time? I am a Native Android App Developer and Flutter App Developer with 4+ years of experience building high-performance Android applications and cross-platform mobile apps for startups, SaaS businesses, and enterprise clients. I specialize in end to end Android app development from pixel perfect UI using Jetpack Compose and XML to Firebase backend integration, REST API integration, and complete Android application deployment on Google Play Store. Whether you need a native Android app built with Kotlin, a modern Android application using Jetpack Compose and MVVM Clean Architecture, or a cross-platform Flutter app I build it right, the first time. 🚀 Android App Development Solutions I Deliver: ✔ Native Android app development using Kotlin & Jetpack Compose ✔ Android application development from idea to Play Store launch ✔ Android Kotlin development clean, scalable, production-ready code ✔ Flutter app development for Android & iOS from a single codebase ✔ Flutter Dart development cross-platform mobile app solutions ✔ E-commerce Android apps with Firebase backend, cart, orders & admin panel ✔ On-demand Android apps booking, real-time tracking & push notifications ✔ Field Force and Field Visit Flutter mobile app with admin panel ✔ SaaS Android applications with subscription, user roles & dashboards ✔ MVP Android app development for startups fast, lean, investor-ready ✔ Custom Android business apps with full REST API & third-party integrations ✔ Android app bug fixing, performance optimization & code refactoring ✔ Figma to Android pixel-perfect Jetpack Compose & XML implementation ✔ Flutter Firebase integration Authentication, Firestore & Cloud Functions 🛠️ Android App Developer Technical Stack: ✔ Android Kotlin primary language for all native Android app development ✔ Jetpack Compose modern declarative Android UI development ✔ MVVM & Clean Architecture scalable Android application structure ✔ Flutter Dart cross-platform Android & iOS app development ✔ Flutter Firebase complete backend integration ✔ State management Riverpod, Provider, BLoC ✔ Firebase Authentication, Firestore, Realtime Database, Cloud Functions ✔ REST API integration & Retrofit for Android ✔ Room Database & SQLite for local Android storage ✔ Push notifications Firebase Cloud Messaging (FCM) ✔ Google Maps & GPS-based real-time location tracking ✔ Payment gateway integration Stripe, PayPal ✔ Social login Google, Facebook, Apple Sign-In ✔ Google Play Store deployment & app submission 📱 Real-World Android Applications I Have Built: ✔ Android E-commerce App Full shopping experience with Firebase backend, product catalog, cart, checkout, order tracking & admin panel built with Kotlin & Jetpack Compose ✔ Field Force Management Mobile App Live agent GPS tracking, task assignment, reporting & web admin dashboard ✔ On-Demand Booking Android App Service booking, provider matching, real-time tracking & in-app payments ✔ SaaS Android Application Multi-role user system, subscription billing, analytics dashboard & REST API backend ✔ Fitness Tracking Android App Workout plans, health metrics, progress charts & Firebase sync ✔ Startup Android MVP Rapid Android app development from idea to Play Store launch in under 6 weeks 🤝 Why Clients Choose Me As Their Android App Developer: ✔ 4+ years of real-world native Android app development & Flutter app development experience ✔ 100% Job Success Score consistent delivery across all Android projects ✔ Android Kotlin expert clean, scalable code following industry best practices ✔ MVVM & Clean Architecture every Android application built to scale ✔ Fast & transparent communication daily updates, no guessing games ✔ Strong UI/UX focus Android apps that look great and perform smoothly ✔ On-time delivery I respect deadlines and manage Android app scope clearly ✔ Post-launch support Android bug fixes, updates & new feature development ✔ Long-term partnership mindset I grow with your Android product I don't just write code I help businesses launch complete, stable, and scalable Android applications and Flutter apps that users love and businesses rely on. 📩 Send me a message describing your project I'll respond within a few hours with a clear plan, timeline, and honest assessment. Let's build something great together. Your Android App Developer & Flutter Developer Uzair Aziz

I help startups, agencies, and product teams build, fix, modernize, and scale Android products that need clean code, stable performance, reliable architecture, and production-ready delivery. I’m a Top Rated Plus Senior Android Developer with 8+ years of experience building production-ready Android apps, native Android applications, Android TV apps, Fire TV apps, Google TV apps, and hardware-connected mobile solutions using Kotlin, Java, Android SDK, Firebase, REST APIs, BLE, Flutter, Dart, and modern Android architecture. My strongest Upwork track record is in native Android app development, especially projects involving Kotlin Android development, Java Android development, Android TV app development, Fire TV app development, BLE Android app development, Firebase Android app development, REST API integration, offline voice Android apps, VOSK integration, media streaming apps, IoT Android apps, and enterprise mobile applications. Core Android Development Services Native Android App Development I build high-quality native Android apps using Kotlin, Java, Android SDK, Jetpack Compose, XML layouts, MVVM, Clean Architecture, Coroutines, Flow, StateFlow, Hilt, Retrofit, Room Database, Firebase, REST APIs, WebSockets, and Google Play Store deployment workflows. Kotlin Android Development I develop modern Kotlin Android apps with scalable architecture, clean UI implementation, API integration, authentication, push notifications, background services, Firebase integration, and Play Store-ready production builds. Java Android App Development I maintain, improve, debug, and modernize Java Android apps, including legacy Android applications, Java to Kotlin improvements, SDK upgrades, API updates, performance fixes, crash fixing, ANR fixing, UI improvements, and long-term Android app maintenance. Android TV & Fire TV App Development I build and improve Android TV apps, Fire TV apps, and Google TV apps with remote-control navigation, D-pad focus handling, media streaming, ExoPlayer, VOD/OTT features, signage systems, custom TV interfaces, REST API integration, and production deployment support. BLE Android App Development I develop BLE Android apps for IoT devices, healthcare devices, smart hardware, Bluetooth Low Energy communication, device scanning, pairing, connection management, real-time data transfer, background synchronization, and stable hardware connectivity. Firebase, REST API & Backend Integration I integrate Firebase Authentication, Firestore, Realtime Database, Firebase Cloud Messaging, Firebase Analytics, Firebase Crashlytics, REST APIs, WebSockets, third-party APIs, payment systems, in-app purchases, admin panels, backend-driven mobile features, and secure authentication flows. Android App Bug Fixing & Performance Optimization I can help fix Android crashes, ANRs, memory leaks, slow performance, Firebase bugs, API issues, Android TV navigation issues, BLE connection issues, Play Store release problems, Android SDK issues, UI bugs, background service issues, and production app stability problems. Relevant Project Experience Android TV / Fire TV App Development Role: Android TV App Developer / Fire TV App Developer / Native Android Developer Built and improved Android TV and Fire TV applications involving media playback, signage systems, remote navigation, connectivity features, REST API integration, Android SDK features, ExoPlayer, and production deployment. Offline Voice Android App with VOSK Role: Android Developer / Kotlin Developer / Java Android Developer Developed offline voice-driven Android functionality using VOSK integration, intent detection, native Android architecture, and production-ready Android app workflows. BLE & IoT Android Apps Role: BLE Android Developer / Android App Developer / IoT Mobile App Developer Worked on BLE and IoT-connected Android solutions involving device communication, Bluetooth Low Energy scanning, pairing, real-time sync, healthcare-style hardware workflows, data handling, and stable connection management. Enterprise Android App Development Role: Senior Android Developer / Kotlin Android Developer / Java Android Developer Delivered Android app development, API integration, Firebase integration, bug fixing, app maintenance, performance optimization, Android SDK upgrades, and long-term support for business and enterprise mobile applications. Flutter Experience I also work with Flutter app development for selected cross-platform projects when clients need Android and iOS support from a shared codebase. My strongest proven Upwork track record is native Android development using Kotlin and Java, but I can also support Flutter apps, Dart, Firebase Flutter integration, REST API integration, Flutter bug fixing, and production deployment. Clients hire me when they need a dependable Senior Android Developer who can take ownership, understand requirements clearly, write maintainable code, solve complex technical problems, and deliver stable production-ready apps

Hi! I'm a passionate and results-driven mobile app developer with 5+ years of experience building sleek, high-performance apps using native technologies (Android Kotlin/Java, iOS) and Flutter. I specialize in crafting user-friendly, scalable, and secure applications—from idea to deployment. ✅ What I Can Do for You: • Native app development (Android – Kotlin/Java, iOS) • Cross-platform app development (Flutter) • Full-stack app development (Mobile + Web) • Firebase integration (Auth, Firestore, FCM, Realtime DB, Storage) • RESTful APIs & third-party API integrations • Clean, modern UI/UX design (Mobile/Web) • Payment gateway integration (Stripe, Safepay, etc.) • Bug fixing, performance optimization & refactoring • Website development (WordPress, HTML/CSS/JS, React, Node.js) • Ecommerce apps & Shopify stores Experience includes building apps ranging from real-time systems to scalable production platforms, with a strong focus on performance, clean architecture, and maintainability. Let’s build something great together—drop a message to get started!

Need an experienced mobile app developer to build, upgrade, or fix your app? With 5+ years of hands-on experience, I specialize in native Android app development using Kotlin & Java — and have expanded into iOS, Flutter, React Native, and Node.js to deliver complete cross-platform and full-stack solutions. I work on both new apps and existing projects: bug fixing, performance optimization, and feature enhancements. ✅ Services I Provide: Native Android App Development using Kotlin & Java Cross-Platform App Development with Flutter & React Native iOS App Development Backend Development with Node.js, Express.js & MongoDB Jetpack Compose for modern UI/UX Fixing Bugs & Crashes in Existing Apps App Maintenance & Updates Firebase Integration: Analytics, Firestore, Realtime DB, AdMob In-App Purchases, Deep Linking, Push Notifications Video & Audio Streaming: ExoPlayer, WebRTC API Integration: REST, GraphQL, Retrofit, OkHttp Offline Functionality, Caching, Secure Payments 🛠 Projects I Work On: New custom Android, iOS, or cross-platform apps from scratch Existing apps that need fixes, updates, or performance improvements Apps rejected by Google Play for policy issues or outdated SDKs Feature integration into legacy codebases Full-stack projects needing both mobile app + backend API 🏆 Tools & Technologies: Kotlin, Java, Jetpack, Hilt, Dagger, Coroutines, Room Flutter, Dart, React Native, JavaScript Node.js, Express.js, MongoDB Kotlin Multiplatform Mobile (KMM) MVVM, MVP, Clean Architecture Firebase, Stripe, Razorpay, Agora, Twilio, Linphone SDK 📈 Let's turn your app idea into reality — or rescue and improve your existing one, on whichever platform fits your project best. 💬 Message me now and let's get started!

𝐁𝐮𝐢𝐥𝐭 𝐚𝐧𝐝 𝐝𝐞𝐩𝐥𝐨𝐲𝐞𝐝 𝐞𝐧𝐭𝐞𝐫𝐩𝐫𝐢𝐬𝐞 𝐝𝐢𝐠𝐢𝐭𝐚𝐥 𝐬𝐢𝐠𝐧𝐚𝐠𝐞 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬 𝐩𝐨𝐰𝐞𝐫𝐢𝐧𝐠 𝟏𝟎𝟎𝟎+ 𝐬𝐜𝐫𝐞𝐞𝐧𝐬 𝐚𝐜𝐫𝐨𝐬𝐬 𝐫𝐞𝐭𝐚𝐢𝐥 𝐜𝐡𝐚𝐢𝐧𝐬, 𝐚𝐝𝐯𝐞𝐫𝐭𝐢𝐬𝐢𝐧𝐠 𝐧𝐞𝐭𝐰𝐨𝐫𝐤𝐬, 𝐫𝐞𝐬𝐭𝐚𝐮𝐫𝐚𝐧𝐭𝐬, 𝐚𝐢𝐫𝐩𝐨𝐫𝐭𝐬 𝐚𝐧𝐝 𝐦𝐮𝐥𝐭𝐢-𝐥𝐨𝐜𝐚𝐭𝐢𝐨𝐧 𝐛𝐮𝐬𝐢𝐧𝐞𝐬𝐬𝐞𝐬. I help companies launch scalable Digital Signage and DOOH platforms including Android Players, Smart TV Apps, Kiosk Systems and Cloud CMS solutions capable of managing hundreds or thousands of displays remotely. My expertise spans both the cloud-based CMS (Web Panel) and the Android signage player app, enabling smooth delivery of dynamic content (video, image, web URLs, templates, widgets and full-apps) to remote displays with scheduling, 𝐨𝐟𝐟𝐥𝐢𝐧𝐞 𝐩𝐥𝐚𝐲𝐛𝐚𝐜𝐤, 𝐤𝐢𝐨𝐬𝐤 𝐦𝐨𝐝𝐞, 𝐝𝐞𝐯𝐢𝐜𝐞 𝐨𝐰𝐧𝐞𝐫, 𝐫𝐞𝐦𝐨𝐭𝐞 𝐝𝐞𝐯𝐢𝐜𝐞 𝐦𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭 and Android TV / Fire TV Apps development ❂ 𝐖𝐡𝐚𝐭 𝐈 𝐝𝐞𝐥𝐢𝐯𝐞𝐫 1. CMS Web Panel ✔ Upload and manage media for each display - video, images, web URLs, templated pages, custom widgets and apps ✔ Flexible scheduling: set specific dates/hours to present content per display or group of screens ✔ Grouping logic: create display groups (e.g., by region, client, campaign) and assign content accordingly ✔ Internal messaging: send scrolling or static text messages to be shown on displays ✔ Subscription & watermark support, animations and branded overlays ✔ Real-time device logging & player reporting: monitor screen health, content playback & status remotely 2. Android Signage Player App (Android 6+ & Amazon Firestick) ✔ Single-app kiosk mode for stable, locked-down display hardware ✔ Auto-relaunch on reboot or crash, ensuring 24/7 continuous operation ✔ Support for 4K content and mixed media types; automatic adjustment for screen aspect ratio and orientation ✔ Offline playback capability: cached content ensures the screen remains active during connectivity outages ✔ Real-time content updates from the CMS, with remote device management capabilities 3. Android TV Apps 4. Amazon Fire TV Apps 5. Samsung Tizen Signage Apps 6. LG WebOS Signage Apps 7. BrightSign Integrations ❂ 𝐈𝐝𝐞𝐚𝐥 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 & 𝐔𝐬𝐞-𝐂𝐚𝐬𝐞𝐬 • Advertising networks and media agencies operating DOOH large-screen campaigns • Retail chains, malls, hospitality venues, airports or stadiums using digital signage for ads, promotions or information • Integrators who need custom signage software (CMS + Android/Fire hardware) for multi-location deployments • Organizations requiring a reliable, scalable signage platform, secure media delivery, scheduling, monitoring and analytics Industries I work with: • Retail Stores & Chains • Restaurants & QSR Brands • Shopping Malls • Corporate Offices • Airports & Transportation • Hospitals & Healthcare • Hotels & Hospitality • Advertising & DOOH Networks ❂ 𝐌𝐲 𝐂𝐨𝐫𝐞 𝐒𝐤𝐢𝐥𝐥𝐬 & 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬 Android | Kotlin | Java | React Native | JavaScript | Node.js | Python | React/Next.js | Laravel | Angular | PostgreSQL | MongoDB | Firebase | WebSocket | MQTT | Docker | AWS / GCP / S3 | Xamarin | Flutterflow 𝐖𝐡𝐲 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡 𝐦𝐞 • I build end-to-end digital signage platforms (CMS + player) that are optimized for large-screen ad campaigns with real-time updates and remote management • I ensure high reliability and offline resilience so your displays keep running even when internet is unstable I design for 4K playback, automatic content scaling, kiosk-mode stability and robust ad delivery, important for DOOH networks • I value clean architecture, scalable design, secure delivery, and clear documentation & communication so your signage system is maintainable and future-proof Whether you're building a new digital signage platform, replacing an existing CMS, launching a DOOH advertising network, or developing a custom Android TV/Kiosk solution, I can help with architecture, development, deployment and scaling. Send me your requirements and I'll provide a phased roadmap, estimated timeline and recommended technology stack.