Hire the Best Android App Developers

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.

As a Senior Native Android Developer & Kotlin Developer with 10 years in the trenches, I help startups, SMBs, and founders fix "vibe-coded" apps, ship MVPs in weeks, translate your vision into high-performance apps from 0 to launch, and integrate on-device AI / LLMs to save cloud costs. ✅ 10 years of native Android & Kotlin experience (4y Java + 6y Kotlin) ✅️ 30+ projects successfully delivered ✅️ 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 ) 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

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.

Senior iOS & Android Developer Native Swift, Kotlin & AI-Powered Apps | 18+ Years | 100% JSS 👋 Hi, I am Darshan a Senior Mobile App Developer with 18+ years of experience building high-performance, scalable, and production- ready native iOS and Android applications. With a 100% Job Success Score, 30+ apps delivered, and 18 years at Deftsoft, I help startups and businesses turn ideas into powerful mobile products that are fast, secure, and built to scale from initial concept through to App Store and Google Play deployment. My focus is not just development — I build complete, polished mobile experiences using Swift, Kotlin, Flutter, and React Native, with AI-powered features, real-time audio/video, and clean architecture that other developers are happy to maintain and build on. ───────────────────────────────────────── 📱 𝗪𝗵𝗮𝘁 𝗜 𝗕𝘂𝗶𝗹𝗱 𝗙𝗼𝗿 𝗬𝗼𝘂 ───────────────────────────────────────── I help startups and businesses build: ✔ Native iOS Apps : Swift & SwiftUI, clean MVVM architecture ✔ Native Android Apps : Kotlin & Jetpack, Material Design ✔ Cross-Platform Apps : Flutter & React Native ✔ AI-Powered Mobile Features : OpenAI API & ML integration ✔ Real-Time Chat & Audio/Video : Firebase, Twilio & Agora ✔ Payment Integrations : Stripe, Razorpay, Apple Pay & Google Pay ✔ GPS & Location Services : Google Maps & real-time tracking ✔ Custom Animations & UI/UX : pixel-perfect, fluid interactions ✔ App Store & Play Store Deployment : full compliance & publishing ───────────────────────────────────────── 🔧 𝗖𝗼𝗿𝗲 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸 ───────────────────────────────────────── Mobile Development ✔ iOS : Swift, SwiftUI, Objective-C, Core Data, Core Animation ✔ Android : Kotlin, Java, Jetpack, MVVM, MVC ✔ Cross-Platform : Flutter, Dart, React Native ✔ Architecture : MVVM, MVC, Clean Architecture Backend & APIs ✔ REST APIs, GraphQL & Firebase ✔ Node.js & backend API integration ✔ Twilio & Agora : real-time audio/video ✔ OpenAI API & ML solutions Deployment & Tools ✔ Apple App Store & Google Play compliance ✔ Firebase Analytics & Crashlytics ✔ In-app purchases & subscription billing ✔ Push notifications : FCM & APNs ───────────────────────────────────────── 🏆 𝗣𝗿𝗼𝘃𝗲𝗻 𝗥𝗲𝘀𝘂𝗹𝘁𝘀 ───────────────────────────────────────── ✔ 18+ years of native iOS & Android development ✔ 100% Job Success Score on Upwork ✔ 30+ production-ready apps delivered ✔ humNET Swift iOS Social Connection App shipped & live ✔ FitQuest React Native Fitness Gamification App shipped & live ✔ Kotlin Kids Piano Learning App shipped & live ✔ Healthcare, social networking & fitness apps with 5-star reviews ───────────────────────────────────────── 💡 𝗪𝗵𝗮𝘁 𝗬𝗼𝘂 𝗖𝗮𝗻 𝗘𝘅𝗽𝗲𝗰𝘁 ───────────────────────────────────────── ✔ Clean, scalable & well-documented code every time ✔ Fast, clear communication & reliable delivery ✔ Native-quality performance on both iOS & Android ✔ AI-first thinking intelligent features built in from day one ✔ Long-term support & continuous improvement after launch ✔ One developer who owns the full mobile build start to finish ───────────────────────────────────────── 🌐 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗲𝘀 𝗜 𝗦𝗲𝗿𝘃𝗲 ───────────────────────────────────────── ➢ Healthcare & Telemedicine ➢ Fitness & Wellness Apps ➢ Social Networking & Community Platforms ➢ E-Commerce & Marketplace Apps ➢ FinTech & Banking Apps ➢ Food Delivery & Restaurant Solutions ➢ Ride-Hailing & Logistics Apps ➢ Travel & Hospitality Platforms ➢ Education & E-Learning Apps ➢ Event Management & Booking Systems ➢ Real Estate & Property Tech ➢ SaaS Platforms & Business Tools ➢ Smart Home & IoT Applications ───────────────────────────────────────── 🤝 𝗛𝗼𝘄 𝗜 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗬𝗼𝘂 ───────────────────────────────────────── 1️⃣ Discovery : understand your app idea & technical requirements 2️⃣ Architecture : design clean iOS/Android structure & tech stack 3️⃣ Development : sprint-based delivery with regular progress updates 4️⃣ Testing : fully tested across devices & OS versions before release 5️⃣ Launch : App Store & Play Store deployment ───────────────────────────────────────── 🚀 𝗟𝗲𝘁'𝘀 𝗕𝘂𝗶𝗹𝗱 𝗬𝗼𝘂𝗿 𝗔𝗽𝗽 ───────────────────────────────────────── Whether you need a full native iOS or Android app from scratch, cross-platform Flutter or React Native development, AI-powered mobile features, or feature upgrades to an existing app I am ready to take ownership of the build from day one. 👉 Send me a message and let's discuss your idea. I respond quickly and I am happy to jump on a call first if that's easier.

Profile Achievements:- ✓ 100% Job Success Rate ✓ Top Rated Profile ✓ Over 7 years in Android + App Development ✓ Cross Platform & Native App Development With 7 years of experience in mobile app development, I have gained strong expertise in developing high-performance native applications for iOS (Swift) and Android (Kotlin/Java). I develop scalable, and robust apps that meet businesses needs while ensuring optimal user experience. I've worked with startups and enterprise-grade solutions, delivering robust and future-proof applications. Key Expertise:- ✅ Native iOS Development (Swift, Objective-C) ✅ Native Android Development (Kotlin, Java) ✅ UI/UX Optimization (Custom components, animations, accessibility) ✅ Backend Integration (Firebase, REST APIs, GraphQL, AWS Lambda) ✅ Real-Time Features (WebSockets, push notifications, Firestore) ✅ Payment & E-Commerce Integration (Stripe, PayPal, Apple/Google Pay) ✅ App Security & Data Protection (OAuth, JWT, biometric authentication) ✅ App Performance Optimization (Lazy loading, caching, memory management) Big 2 Projects:- FinTech Banking App: (iOS & Android) - Developed for a leading financial institution, handling transactions for 500K+ users. - Integrated real-time payments, multi-layer authentication, AI-driven financial insights. - Achieved 99.9% uptime and 40% faster transaction processing. Health & Fitness Application: (Swift & Kotlin) - Built an AI-powered fitness tracking app with personalized workout recommendations. - Developed a custom motion tracking algorithm using device sensors (Gyroscope & Accelerometer). - Successfully scaled the app to 250K+ active users, driving engagement with gamification features. Development Approach & Workflow 📌 Agile Development: Sprint-based execution with CI/CD pipelines (Jenkins, GitHub Actions). 📌 UI/UX Design: Prototyping in Figma, Sketch, followed by performance tuning. 📌 API-First Development: Seamless backend connections with REST, GraphQL, Firebase. 📌 Automated Testing & Deployment: Unit/UI testing with XCUITest, Espresso, Firebase Test Lab. 📌 Post-Launch Support: Monitoring, updates, scalability improvements for future growth. Tech Stack & Tools: Technologies: Swift, Kotlin, Java, Firebase, GraphQL, REST APIs, AWS, Google Cloud. Dev Tools: Git, Bitbucket, Docker, Fastlane, Postman. Frameworks: Jetpack Compose, SwiftUI, Alamofire, Retrofit, RoomDB. Platforms: iOS, Android, App Store, Google Play, AWS, Azure. Let's connect for a quick exploratory chat to kickoff with your idea into mobile app! Keywords: Mobile App Developer, Android, iOS, React Native, Flutter, Kotlin, Swift, Dart, Cross-Platform Apps, Native Development, Firebase, Firestore, Realtime DB, Node.js, Express.js, REST API, GraphQL, OAuth, SQLite, MongoDB, Stripe, PayPal, Apple Pay, Google Pay, Git, GitHub, CI/CD, Google Play, App Store, Agile, Scrum, App Optimization, ASO, Crashlytics, BLE, Geolocation, AR, Video Streaming, WebSockets, Social API Integration, Google Cloud, AWS, Jetpack Compose, Hilt, Dagger, Coroutines, Room DB, MVVM, Clean Architecture, Unit Testing, SDK Integration.

⚡️ Top 3% on Upwork ⚡️ 7000+ hours ⚡️ 100% Job Success 🔸️ 9+ years of experience 🔸️ 20+ projects done 🔸️ 15+ apps built from scratch Feedback about working with me: ⭐️⭐️⭐️⭐️⭐️ "What I liked about working with Mohammed is that he was enthusiastic about the project and clear in his communication. Before implementing something he would make sure he understood the task correctly. (This is a feature I look out for in freelancers as it can potentially save you lots of money and frustration)" ⭐️⭐️⭐️⭐️⭐️ "A very good developer to work with, very skilled, punctual, and has very friendly behaviour, and very good communication skill also. Also like to hire next time." ⭐️⭐️⭐️⭐️⭐️ "Mohammed has ample skills to get the project done in timely fashion. Adheres to schedule and provided us with alternate solution which wasn't the scope of work. Happy to hire him again" ⭐️⭐️⭐️⭐️⭐️ "Great developer with good skills in Android development. He understood the project requirements and brought up good suggestions. And plus he is always available. I highly recommend him and will continue working with him on some other project." ⭐️⭐️⭐️⭐️⭐️ "Mohammed is a very skilled and careful programmer. His work was very thorough and detailed" ⭐️⭐️⭐️⭐️⭐️ "Mohammad was one of our better employees. Mohammad's strength is hard work and perseverance - he tries to solve problems, not avoid them. I wish Mohammad good luck in his future ventures and hope to work with him again." ⭐️⭐️⭐️⭐️⭐️ "Mr. Muhammed is one from the best android developers worked with, he did very difficult project with multiple scenarios, i hope to work with him in my future projects." ⭐️⭐️⭐️⭐️⭐️ "Mohammed is very skillful. Tracks and corrects the end-to-end process, with ideas and solutions that make a better final result." ⭐️⭐️⭐️⭐️⭐️ "Great again, Probably the best professional we have hired. Thanks again." ⭐️⭐️⭐️⭐️⭐️ "Highly talented developers can be hard to find. He is one of the best developers i've found. His communication was top-notch, he met all deadlines, and his skills were reasonably strong" ⭐️⭐️⭐️⭐️⭐️ "all perfect, thanks!" ⭐️⭐️⭐️⭐️⭐️ "Good work. We will continue working with him." Why Hire Me? 💫 Your project is in capable hands, with clean, maintainable code built with best practices, ensuring your investment is maximized and not wasted. 💫 I prioritize your requirements and only take on projects if I can deliver 100% satisfaction. 💫 I ensure timely project completion by keeping track of schedules, deadlines, and your needs. 💫 I listen to your needs and provide solutions aligned with your business goals. About me: My name is Mohammed, and I am an Android/IOS Developer, highly skilled in native app development with 9+ years of experience designing, building, and customizing apps for various domains such as Hotel Management, Freight forwarding & shipping software solutions, Payment System, Doctor Booking, Health, and Fitness, Food Industry, Social Media Apps, Dating App, Productivity Apps, Service Providers, etc. I have the passion to help you complete your project in the best possible way. My Mobile Development skills include expertise in: 🔸️ C++ / Java / Kotlin / Swift / Javascript 🔸️ Native Android / IOS Development 🔸️ Cross-Platform - KMM / React Native 🔸️ XML && Jetpack Compose 🔸️ XCode Storyboard && SwiftUi 🔸️ Android widgets 🔸️ Android Jetpack libraries 🔸️ Android app modularization 🔸️ App Security 🔸️ App Architecture patterns such as MVC, MVP, MVVM, Delegate swift 🔸️ Phone/Tablet && Wear OS && Android TV/ AndroidAuto && Android widgets 🔸️RSocket 🔸️ WebRTC 🔸️ Dagger/Hilt 🔸️ Rx (Java, Kotlin) 🔸️ Kotlin Coroutines 🔸️ Local Database management with SQLite, Realm, ORMLITE, Room 🔸️ working with APIs (Retrofit, Volley, okhttp3, Ktor) 🔸️ working with real-time APIs (WebSockets, XMPP, IoT MQTT) 🔸️ implementing (Work Managers, Background Services, Alarm Managers) 🔸️ Firebase Integration 🔸️ Maps (Google, MapBox, Openstreetmap) 🔸️ social media integration with Facebook, Twitter, and Instagram 🔸️ PDF Rendering 🔸️ 3D Model Rendering 🔸️ device hardware such as Bluetooth, GPS, Accelerometer, Camera, etc. 🔸️testing (Unit testing, Espresso testing) In addition to my Mobile Development skills, I also have expertise in: 🔸️ Data Structures and Algorithms 🔸️ OOP patterns 🔸️ Spring framework 🔸️ JavaFx 🔸️ Angular 🔸️HTML 🔸️CSS 🔸️typescript 🔸️Git (Bitbucket, GitHub, Gitlab) 🔸️Agile methodology Please do not hesitate to reach out if you have any questions or if you are interested in working with me. I look forward to the opportunity to work with you ^_^.