Hire the Best Android App Developers

✅ Android Developer | Kotlin, Jetpack Compose, KMP, Firebase ✅ Top Rated on Upwork with 100% Job Success across 18 projects ✅ 15+ production Android apps shipped, including apps at 1M+ and 5M+ downloads ✅ Offline-first, on-device AI and payment integration built in I build complete Android apps, including the parts most developers avoid. That means apps that keep working when the connection drops, handle payments properly, process camera and media on device, and run AI features locally rather than sending everything to a server. I work with startups, SaaS companies and businesses shipping to real users on Google Play, across the US, UK, UAE and Europe. Here's what I can help you with: ✔ Full Android App Development End-to-end native builds in Kotlin and Jetpack Compose using MVVM, MVI and Clean Architecture, with Coroutines, Flow, Hilt, Room and WorkManager, taken from planning through to Play Store release and ASO. ✔ Offline-First & Sync-Heavy Apps POS systems, field service and retail apps that keep taking orders and recording work with no connection, then reconcile cleanly when they reconnect. Background sync, WorkManager, foreground services and conflict handling. ✔ Kotlin Multiplatform (KMP& CMP) Shared business logic across Android and iOS with fully native UI on each platform, or Compose Multiplatform where you want shared UI too. One codebase for the logic, faster delivery, no compromise on performance. ✔ On-Device AI & Camera Features ML Kit and TensorFlow Lite for image recognition, object and face detection, OCR and camera stream analysis, plus OpenAI and Gemini API integration for chat and automation inside the app. ✔ Payments, Media & Integrations Stripe and Google Play Billing, in-app purchases and subscriptions, ExoPlayer and Media3 for video, Firebase across Auth, Firestore, Cloud Messaging and Crashlytics, plus REST API and third-party SDK integration. ✔ App Modernization & Rescue The new overview Migrating legacy Android apps to Kotlin and Compose, fixing performance and crash problems, resolving Play Store rejections, and taking over codebases that need someone to own them properly. I've built fintech and payment apps, hotel PMS systems, Android TV and IPTV launchers, POS apps for retail and restaurants, SaaS dashboards and AI-powered applications. What a client said: "Shahzad knows his stuff, is a great communicator, accentuates the positive, and is eager to provide excellence for this client. He pointed out several areas where my code could be improved, and provided explanations for his suggested changes. Shazad is pleasant to work with, and I will utilize his service for future Android projects." Send me what you're building or what's broken, and I'll tell you the right technical approach before you commit to anything.

Looking for a modern, high-performance Android app built with the latest technologies — or a sharp-eyed tester who truly understands how Android apps work under the hood? 👋 Hello! I am a passionate Android Developer and QA Tester specialized in building and testing native mobile applications. On the development side, I use Kotlin and Jetpack Compose to craft clean, maintainable code and intuitive, responsive UIs. On the testing side, my hands-on development background means I don't just report bugs — I understand why they happen. While my primary focus is modern Android development (Kotlin/Compose), I also possess strong foundational experience with Java, allowing me to maintain legacy projects or handle complex logic with ease. 🚀 Modern Android Development (Kotlin & Compose) I specialize in the "New Android" stack. By using Jetpack Compose, I build UIs faster and with fewer bugs than traditional XML methods. I strictly follow the MVVM (Model-View-ViewModel) architectural pattern, ensuring your app is scalable, testable, and easy to maintain long-term. My Core Technical Skills: Languages: Kotlin (Primary), Java. UI Toolkit: Jetpack Compose (State Management, Theming, Animation), XML Layouts. Architecture: MVVM, Clean Architecture principles. Networking: REST APIs, Retrofit, JSON parsing (GSON/Moshi). Local Data: Room Database, DataStore. Concurrency: Kotlin Coroutines & Flow. Tools: Git/GitHub, Android Studio, Gradle. 🧪 Android QA & Beta Testing Beyond building apps, I have hands-on experience as a dedicated Android QA Beta Tester — and my development background gives me a genuine edge here. I know exactly where Android apps tend to break. What I bring to testing engagements: ✅ Functional Testing: Systematically verifying features work as intended across real devices and edge cases. ✅ UX & UI Testing: Evaluating user flows, screen responsiveness, and interaction quality with a developer's eye for detail. ✅ Bug Reporting: Clear, structured, and actionable bug reports that developers can actually use — because I am one. ✅ Google Play Closed / Beta Testing: Experienced with 14-day closed testing cycles on the Google Play Console. ✅ Web App Testing: Functional and UX testing for web-based applications. Recent Testing Experience: ⭐ AIPuna App (14-Day Android Beta Test) — Rated 5.0: "Proactive and went above and beyond the initial requirements. Provided helpful feedback and was very reliable throughout." ⭐ Android Closed Beta Test (14-Day) — Rated 5.0 ⭐ Moola Financial Planning Web App (Beta Test) — Rated 5.0: "Prompt and thoughtful feedback. Clear Communicator." 🛠️ Development Services I Provide Whether you need a new app from scratch or need to fix bugs in an existing one, I can help. ✅ Custom Android App Development: Building native apps from zero to launch using Kotlin. ✅ UI/UX Implementation: Converting Figma/Adobe XD designs into pixel-perfect Jetpack Compose code. ✅ API Integration: Connecting your app to backend services and third-party APIs using Retrofit. ✅ Database Management: Implementing offline capabilities using Room Database. ✅ Bug Fixing & Optimization: Debugging crashes and improving app performance. ✅ Legacy Code Support: Fixing or updating existing Java-based Android projects. 💡 Why Work With Me? Modern Approach: I follow the latest Google best practices (Android Jetpack) — in both development and testing. Developer-Backed Testing: When I test your app, I understand it at the code level. My feedback is deeper and more useful. Clear Communication: I keep you updated at every stage of the development or testing process. Attention to Detail: I care about the small UI details that make an app feel "premium" — and the subtle bugs that break the experience. Ready to build your app idea or put your existing app through its paces? 🗨 Let's chat! Shoot me a message on UpWork and let's schedule a strategy call to see if I can help you out. No obligations, just a casual conversation to see if we're a good fit. So don't hesitate to reach out! Cheers.

Need an Android app that is fast, scalable, and production-ready? You're in the right place. I'm Inam Ullah Khan, a Native Android Developer with 3 years of experience building modern Android applications using Kotlin, Jetpack Compose, MVVM, Firebase, and REST APIs. I help startups, SaaS companies, and growing businesses build Android apps that are reliable, maintainable, and ready for real users. What I can help you with: • Build Android apps from scratch • Jetpack Compose UI Development • Kotlin & Java Development • Firebase Authentication, Firestore & FCM • REST API Integration • Room Database & Offline Support • Google Maps & Location Features • Payment Gateway Integration • AI Features using OpenAI APIs • Bug Fixing & Performance Optimization • Google Play Store Publishing Why clients hire me: ✓ Clean, maintainable architecture (MVVM + SOLID) ✓ Fast communication ✓ Daily progress updates ✓ Production-quality code ✓ Long-term support I focus on building Android applications that are easy to scale, easy to maintain, and enjoyable for users. If you're looking for a reliable Android developer who can turn your idea into a polished product, I'd be happy to discuss your project.

🚀 𝗔𝘃𝗮𝗶𝗹𝗮𝗯𝗹𝗲 𝘁𝗼 𝘀𝘁𝗮𝗿𝘁 𝗼𝗻 𝗔𝘂𝗴 𝟭4 ✅ 10 years in the trenches: Top-Rated native Android Developer & Kotlin Developer ✅️ 100k+ MAU app development experience ✅️ 4.5+ average rating across launched Google Play apps ✅ Under 0.1% crash & ANR rate across all launched apps ✅️ 5-star feedback from past clients ✅️ $100k+ earned on Upwork with Top-Rated status ✅️ 100% JSS ✅️ Hands-on experience with Kotlin Multiplatform ( KMP , CMP ) As an experienced Android Developer & Mobile Developer, I help startups, SMBs, and founders fix "vibe-coded" apps performance, ship MVPs in weeks, integrate on-device AI / LLMs to save cloud costs, and build scalable apps from 0 to launch. In 2026 I specialize in: - on-device AI integration using MediaPipe / LiteRT / Google ML Kit / TensorFlow ( Object detection , Face detection , Pose detection , Text summarizing, OCR , TTS, STT ); - video / media editing apps ( FFMpeg , AndroidX Media3 , MediaCodec ); - build, improve and maintain media , social , edtech, utility, productivity tools); - performance optimization , bug fixing , firebase crash resolution and ANRs 🌟🌟🌟🌟🌟 Recent feedback : "I was particularly impressed by his strong attention to detail - nothing was overlooked, and the quality of the work consistently met high standards. He showed real commitment to the project, staying engaged and proactive throughout the development process. His regularity and consistency in delivering work made collaboration smooth and reliable." - Neil 🚀 Also I've been building my own Android apps so that gives me a deep understanding of not only a technical part but also ASO and monetization strategy. ✅️ Recent large-scale projects: --- PDF Maker & Reader (130k+ installs , 🌟4.6 on Google Play) Role: Android Developer / Android App Developer / Kotlin Developer I recently built this high-performance Android app from scratch based on Figma mockup using Kotlin. It allows users to quickly convert images to PDF and edit existing PDFs using a fast, local-first architecture. The app has achieved 130k+ downloads and 8k monthly active users on Google Play, with the crash rate lower than 0.1%. --- --- US Medical Education App (COMQUEST for COMLEX & COMAT Prep) Role: Android Developer / Android App Developer / Mobile Developer As part of an international team alongside iOS Developer and Web Developer, I built this Android app from scratch based on Figma designs for US medical students. Continue providing ongoing support for this project, ensuring the mobile app remains a stable and reliable tool for users. --- --- US Automotive Video Suite app Role: Android Developer / Android App Developer / Mobile Developer In collaborating with an iOS Developer and a Full Stack Developer, I built two native Android apps from scratch as a clone of iOS apps (Dealer Video Inventory and Dealer Video Suite) that allows dealers to capture high-quality vehicle inventory videos and photos. These projects helps dealers increase sales through personalized video. --- 🌟 🌟🌟🌟🌟 "Dmitri is a pleasure to work with. He's Android programming skills are exceptional. He's always professional and easy to work with. He is very methodical in his approach. Which at times has resulted in delivery scheduling slipping a little but I rather have a good product than a hastily put together product. We're continuing to work with Dima for other projects." - Philip Whether you are looking for a Mobile Developer to lead a new project or an Android Developer to optimize an existing Java / Kotlin codebase or optimize performance, my goal is to provide technical clarity and long-term stability. As a team player for cross-platform projects I have a proven track record of working alongside iOS developers to ensure smooth releases. I also have specific experience collaborating with Flutter Developers and Full Stack Developers to bridge the gap between cross-platform Flutter / React Native code and the system features specifically by developing custom Java / Kotlin modules to handle native Android OS functionality that standard Flutter plugins can't reach. --- 🚀 My core stack: 🔸️Languages: Java , Kotlin 🔸️UI: XML , Jetpack Compose 🔸️Architecture: MVVM , MVI , Clean Architecture 🔸️Native: Android SDK , Android Studio 🔸️Multiplatform: Kotlin Multiplatform ( KMM / KMP ) / Compose Multiplatform ( CMP ) 🔸️Key features: Camera , Photo & Video capture and edit using FFMpeg , OpenGL , OpenCV ; GPS , Location , Chat , Background syncronization , WorkManager and foreground services, ofline-first approach, on-device AI / LLM , VPN / WireGuard , ExoPlayer / Media3 🔸️On-device AI integration : Video analysis , Image recognition , Object detection , Face detection , Pose Detection , Camera stream analysis , Text-to-Speech , Speech-to-Text ( MediaPipe / Google AI Edge , TensorFlow / TFLite , Google ML kit ). 🔸️Cloud AI integration : OpenAI , Gemini API

🌟 “𝐓𝐫𝐮𝐥𝐲 𝐬𝐮𝐜𝐜𝐞𝐬𝐬𝐟𝐮𝐥 𝐌𝐨𝐛𝐢𝐥𝐞 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 𝐚𝐫𝐞 𝐦𝐞𝐚𝐬𝐮𝐫𝐞𝐝 𝐛𝐲 𝐭𝐡𝐞𝐢𝐫 𝐢𝐦𝐩𝐚𝐜𝐭 𝐢𝐧 𝐬𝐨𝐥𝐯𝐢𝐧𝐠 𝐫𝐞𝐚𝐥-𝐰𝐨𝐫𝐥𝐝 𝐮𝐬𝐞𝐫 𝐩𝐚𝐢𝐧 𝐩𝐨𝐢𝐧𝐭𝐬, 𝐧𝐨𝐭 𝐦𝐞𝐫𝐞𝐥𝐲 𝐭𝐡𝐞 𝐬𝐨𝐩𝐡𝐢𝐬𝐭𝐢𝐜𝐚𝐭𝐢𝐨𝐧 𝐨𝐟 𝐭𝐡𝐞 𝐰𝐫𝐢𝐭𝐭𝐞𝐧 𝐜𝐨𝐝𝐞.” I specialize in transforming business concepts into high-speed, cross-platform mobile applications (iOS and Android) that boast a robust architecture and exceptional scalability. My work extends beyond programming; the core of my approach involves in-depth user analysis, crafting intuitive interfaces, and building a product designed to drive revenue and foster business growth 📈. By strictly adhering to premium software architecture standards and a systematic development pipeline, I ensure your application is not just fit for today but is future-proof and ready to scale with your enterprise 💼. ⚙️ 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 𝗶𝗻 𝗮𝗿𝗲𝗮𝘀: - Cross-Platform Mobile App Development using Flutter, Dart - iPhone app development - iPad app development - iOS SDK/framework development - Swift, iOS SDK, Xcode - Android app development - Android library development - Kotlin, Java, Android SDK, Android Studio 🧩 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀 𝗮𝗻𝗱 𝗧𝗼𝗼𝗹𝘀 𝗞𝗻𝗼𝘄𝗹𝗲𝗱𝗴𝗲: - Dart, Swift, Kotlin, Java - BLoC Pattern, Provider, Font Awesome Flutter, MVVM, Clean Architecture, MVC, MVP - Github, Gitlab - Firebase Storage, Firestore, Realtime database, Analytics, Push Notification, in-app Messaging, In-app-purchase - Payment Gateway Integration - Youtube API, Google Maps, Geofencing - Deep linking, Firebase dynamic links - Data storage: Realm, Room, SQLite, Coredata 💡 𝗪𝗵𝘆 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲 𝗮𝘀 𝗬𝗼𝘂𝗿 𝗠𝗼𝗯𝗶𝗹𝗲 𝗔𝗽𝗽 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 🧠 I follow proper software architecture that ensures scalable and maintainable apps 📅Weekly progress updates & flexible work hours (fixed price or hourly) 🤝 Teamwork and long-term support my clients love my collaborative approach 📌 If you’re looking for someone who lives and breathes mobile app development, let’s connect. I’ll help you build an app that not only works but also grows your business 🚀 🔑 𝗞𝗲𝘆 𝘀𝗸𝗶𝗹𝗹𝘀: Flutter, Mobile App Development, Cross-Platform Mobile App Development, iOS Flutter Mobile App Development, Android Flutter Mobile App Development, Dart Programming, Swift Programming, Kotlin Programming, Java for Android, Material & Cupertino Design, Firebase Integration, Backend Integration, RESTful APIs, Push Notifications, App Performance Optimization, Version Control (Git), Mobile App Testing, AI & Automation Integration (ChatGPT, OpenAI API), Payment & Third-Party API Integration, Responsive & Adaptive Layouts, App Debugging & Maintenance, App Store & Google Play Publishing.

🏆 TOP RATED mobile developer specializing in iOS & Android Application Development. 🚀 Building your dream Mobile App which helps in expanding your business, and fulfilling your expectations is my goal 💎 7+ Years of Professional Full-stack Development & UI/UX Design Experience. 🚀 100+ Upwork Projects Accomplished. 🥇 If you need to implement your app idea into reality - you've opened the right freelancer.🥇 🟢 GO GREEN 🟢 🎓 Uka Tarsadia University 👨‍💻 Bachelor's Degree in Computer Science 🥇 Master's Degree in Computer Science How we can help you: - Build an app from ideation to MVP and beyond - Revive, update or fix existing applications in need of some care and feeding - Integrate new or existing applications into popular back-ends like Firebase or AWS - Get previously stalled app development efforts over the finish line - Consult on feature possibilities, App Store guidelines, and monetization strategies - Perform code reviews 💥 Android Development - Java & Kotlin 💥 Ios Development - Swift5 & Objective-c Android/iOS/Swift/Kotlin Mobile App Development I'm a native mobile developer working as a freelancer for 6+ years to develop iOS and android app development and I love what I do!. You'll find me a friendly developer, cooperative, and easy to work with! I'm a professional mobile developer highly responsible, and creative, with initiative and punctuality. I responsibly assume the challenges and goals that are assigned to me, can work under high pressure and solve problems efficiently. I am a strong person with excellent motivation skills and a record of delivering projects that are on schedule and within scope requirements. There is one thing which I will never tell you out loud, because I think it just goes without saying - your satisfaction is guaranteed. We have a team of senior Mobile app developers, Web developers, UI/UX designers, and expert app development resources skilled with different technologies and design tools. I focus on listening & understanding your needs and requirements and focus on developing reliable and outstanding solutions. I don't stop until you are satisfied with the outcome. Software Engineering and app development is my passion, and I will leave no stone unturned in producing a professional solution for you! My focus on transparency and communication means that I deliver the highest level of client satisfaction. My specialties are: - Well-written, robust code - Database solutions that can scale - Beautiful and engaging mobile app design - Building solutions to fit YOUR specific needs Why Choose Us? ✪ 100% Quality Work ✪ Commitment on time ✪ Friendly Communication ✪ Fluent in English Share your requirement. ✫✫✫✫ My Skills ✫✫✫✫ ➤ Native Mobile: iOS & Android, iPhone Android SDK, XCode ➤ Cross-Platform Mobile App Development using Flutter, Dart ➤ iPhone app development ➤ iPad app development ➤ iOS SDK/framework development ➤ Swift, iOS SDK, Xcode ➤ Android app development ➤ Android library development ➤ Kotlin, Java, Android SDK, Android Studio ✅ Communication: From my experience as a developer, communication is one of the most important things when working together. Honest and sincere communication. I make it a responsibility of mine to be as responsive as possible to ensure a smooth working process. ✅ Mastery: As Don Miguel Ruiz said in The 4 Agreements, always do your best. I always go the extra mile to make sure the applications I create are flawless and attractive; I want to be confident in every application I showcase on my portfolio I'm excited to work with you! If you are a start up looking to take your product to the next level, or an established business looking to scale your services, let’s get to work. We are very much interested and glad to work with you. NOTE: Most of my work is done for US-based clients. I've added a few items to the portfolio, but please ask me about the other work which I can't showcase. While I'm often bound by NDA/Confidentiality agreements,I can explain more about my background in a general way than is illustrated publicly. Feel free to contact us. My focus is to provide high-quality products at the final stage of my work. Native Android App Development, Native iOS App Development, Flutter Cross-Platform App Development, App Development, Phone, Firebase, UI/UX Design, Prototype, RESTful API, In-app purchases, Location, Payment Gateway Integration, Apple Xcode, Android Studio, Push notifications, User authentication, User profile creation, Phone, API Development, API Integration, Front End Development, Back End Development, QA, Unit Testing, Regression Testing, Dating App Development, Ecommerce App Development, Ride Booking App Development, 3rd Party SDK Integration, Realm Database, SQLite, MySQL, Firebase Cloud Firestore, Firebase Realtime Database, Kotlin, Swift, Java, Dart, SwiftUI, Twilio API, Mapbox, HealthKit, Alamofire, Google Analytics, Amazon Web Services,UIKit, MapKit,App