Native Android Developer | Java & Kotlin 🚀 Top Rated 💯 100% Job Success Score I'm Saleh, a senior Android developer with 8+ years of experience building apps from scratch, improving existing codebases, and transforming UI/UX designs into smooth, pixel-perfect Android interfaces. ✅ Clean Architecture (MVVM) ✅ Kotlin, Jetpack Compose, Coroutines ✅ Firebase, REST APIs, Room DB ✅ Material Design, Navigation Component, Hilt ✅ Modular, maintainable code I’ve worked with startups and businesses around the world, helping them: Launch MVPs fast Convert legacy Java apps to modern Kotlin Optimize performance and fix crash-prone builds Whether you need to fix a bug, upgrade your app, or build something from the ground up . I can help you do it right, the first time. Let’s build something great. Feel free to invite me to your job or send a message to discuss your project!

Welcome clients I help founders and businesses turn ideas into fast, reliable mobile apps that scale. My focus is clean architecture, smooth user experience, and code that’s easy to maintain long after delivery. I specialize in Android (Kotlin) and cross-platform mobile development (Flutter & React Native), backed by strong backend and AI integration experience. This allows me to take ownership of complete app workflows - from UI to APIs, databases, and intelligent features. What I Do Best: Mobile App Development Native Android apps using Kotlin & Jetpack Compose Cross-platform apps using Flutter and React Native iOS & Android builds from a single, clean codebase Performance-focused UI, offline support, and smooth animations Backend & Full-Stack Support Secure backend APIs with Django Firebase & Supabase (Auth, Firestore, Realtime DB, FCM, Cloud Functions) REST APIs, role-based access, analytics, and scalable data flows SQL & NoSQL databases: PostgreSQL, MySQL, MongoDB, SQLite AI & Machine Learning Integration AI features using OpenAI, Gemini, and custom ML models On-device ML using ML Kit for fast, offline use cases Text, image, voice, and recommendation-based AI workflows Model integration without overengineering or unnecessary cost Hardware, IoT & Advanced Features Bluetooth & sensor-based apps (camera, gyroscope, proximity, GPS) IoT and hardware-enabled mobile applications AR feature integration when required Real-time data sync and device communication Strong Engineering Foundation Solid Data Structures & Algorithms Clean architecture, modular code, and readable documentation Focus on scalability, performance, and long-term maintainability I communicate clearly, ask the right technical questions early, and build with future updates in mind. Whether you need an MVP, a production-ready app, or help improving an existing system, I aim to deliver work that is practical, stable, and easy to extend. My core Skills: Android Developer Kotlin Developer Flutter Developer React Native Firebase Mobile App Development API Integration(Payment gateway and other 3rd party apis) AI Integration If you’re looking for a developer who understands both product needs and engineering discipline, I’d be glad to help bring your idea to life. Looking forward to connect with you. Kind regards, Muhammed

I am a Senior Android Engineer with extensive experience delivering high-quality, production-ready mobile applications. My main focus is native Android development with Kotlin and Jetpack Compose, where I’ve built and maintained apps used by thousands to millions of users. In addition, I have successfully built and delivered cross-platform apps in Flutter and React Native, taking projects from concept and development through to production and market release. This allows me to tackle both native Android and cross-platform projects end-to-end, while maintaining deep expertise in Android. With 21,000+ hours on Upwork and top-rated feedback, I have proven the ability to deliver results efficiently, reliably, and to specification, whether it’s a long-term Android contract or a cross-platform project. If you’re looking for a senior mobile engineer who can own Android projects and also deliver cross-platform apps from scratch to market, I can help your app succeed quickly and efficiently.

Senior Android Engineer with 9 years of experience in developing Java/Kotlin-based mobile solutions with strong exposure to IoT and real-time systems. Proficient in integrating hardware components and microcontrollers (e.g., ESP32) via Bluetooth Low Energy (BLE), and implementing real-time features using WebSockets and REST APIs. Collaborated closely with hardware engineers and backend teams to deliver seamless IoT-enabled experiences. Hands-on experience in integrating payment gateways and managing subscriptions. Passionate about developing high-performance, reliable Android applications and staying current with emerging trends in IoT and mobile development.

🎁 𝗜 𝗿𝗲𝘃𝗶𝗲𝘄 𝘆𝗼𝘂𝗿 𝗮𝗽𝗽 𝗶𝗱𝗲𝗮 𝗼𝗿 𝗲𝘅𝗶𝘀𝘁𝗶𝗻𝗴 𝗔𝗻𝗱𝗿𝗼𝗶𝗱 𝗰𝗼𝗱𝗲 𝗮𝗻𝗱 𝘀𝘂𝗴𝗴𝗲𝘀𝘁 𝗽𝗿𝗮𝗰𝘁𝗶𝗰𝗮𝗹 𝗶𝗺𝗽𝗿𝗼𝘃𝗲𝗺𝗲𝗻𝘁𝘀 𝗯𝗲𝗳𝗼𝗿𝗲 𝘆𝗼𝘂 𝗵𝗶𝗿𝗲 𝗺𝗲. Many clients come to me after dealing with: → 𝗔𝗽𝗽𝘀 𝘁𝗵𝗮𝘁 𝗰𝗿𝗮𝘀𝗵 𝗼𝗿 𝘀𝗹𝗼𝘄 𝗱𝗼𝘄𝗻 𝘂𝗻𝗱𝗲𝗿 𝗿𝗲𝗮𝗹 𝘂𝘀𝗲𝗿𝘀 → 𝗣𝗼𝗼𝗿 𝗚𝗣𝗦 𝗮𝗰𝗰𝘂𝗿𝗮𝗰𝘆, 𝗯𝗮𝗰𝗸𝗴𝗿𝗼𝘂𝗻𝗱 𝘁𝗿𝗮𝗰𝗸𝗶𝗻𝗴 𝗶𝘀𝘀𝘂𝗲𝘀, 𝗼𝗿 𝘂𝗻𝗿𝗲𝗹𝗶𝗮𝗯𝗹𝗲 𝗻𝗮𝘃𝗶𝗴𝗮𝘁𝗶𝗼𝗻 → 𝗠𝗲𝘀𝘀𝘆 𝗮𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 𝘁𝗵𝗮𝘁’𝘀 𝗵𝗮𝗿𝗱 𝘁𝗼 𝘀𝗰𝗮𝗹𝗲 → 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿𝘀 𝘄𝗵𝗼 𝘀𝗵𝗶𝗽 𝗳𝗲𝗮𝘁𝘂𝗿𝗲𝘀 𝗯𝘂𝘁 𝗱𝗶𝘀𝗮𝗽𝗽𝗲𝗮𝗿 𝗮𝗳𝘁𝗲𝗿 𝗹𝗮𝘂𝗻𝗰𝗵 I build stable, scalable, and real-world Android applications that perform reliably in production. With 9+ years of hands-on Android experience, I code myself, focus on clean architecture, and deliver apps businesses can confidently scale. From MVP to Play Store — I make sure your app is fast, accurate, battery-efficient, and crash-free. ➤ 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 → Native Android App Development → Kotlin & Java → Jetpack Compose UI → Clean Architecture (MVVM, MVI) → Performance, stability & memory optimization → GPS, Maps & real-time tracking systems ➤ 𝗦𝗸𝗶𝗹𝗹𝘀 → Android SDK → Kotlin, Java → Jetpack Compose → Firebase (Auth, Firestore, FCM) → REST API integration → Room & SQLite → Google Maps, location services & background tracking ➤ 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀 → Android app development (MVP → Production) → New app builds & existing app improvements → App performance optimization & crash fixing → Firebase & real-time features → GPS navigation, tracking & location-based features → Play Store release & long-term maintenance ➤ 𝗪𝗼𝗿𝗸𝗶𝗻𝗴 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 → 9+ years Android development → 20+ commercial Android apps delivered → Apps with 1M+ active users → Startup & enterprise-level products → Long-term product ownership mindset ➤ 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝘆 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 → eCommerce & grocery delivery apps → FinTech & payment systems → Delivery & on-demand platforms → Streaming & media apps → Enterprise mobile solutions → GPS navigation, speed alerts & road-hazard systems → Maps-based apps, real-time tracking & driver utilities ➤ 𝗗𝗼𝗺𝗮𝗶𝗻 𝗞𝗻𝗼𝘄𝗹𝗲𝗱𝗴𝗲 → Scalable mobile architectures → High-traffic handling → Secure transactions & payment flows → Offline-first mobile apps → Battery-optimized background services → Navigation accuracy, GPS performance & map reliability ➤ 𝗧𝗼𝗼𝗹𝘀 → Android Studio → Git, GitHub, Bitbucket → Firebase Console → Jira, Trello → Jenkins, Fastlane → Google Maps API, Location Services → Figma (design implementation support) 👉 Need an Android app that works reliably in real-world conditions? 👉 Building a GPS, maps, tracking, or delivery app? 👉 Click Invite to Job and get a free app review. 𝗖𝗹𝗲𝗮𝗿 𝗰𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻. 𝗖𝗹𝗲𝗮𝗻 𝗰𝗼𝗱𝗲. 𝗥𝗲𝗹𝗶𝗮𝗯𝗹𝗲 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝘆. 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀 Android Developer, Senior Android Developer, Kotlin Developer, Jetpack Compose, Android App Development, Native Android, Clean Architecture, MVVM, Firebase Android, GPS Tracking App, Navigation App, Google Maps Android, Location Based Apps, Background Tracking, Delivery Apps, Traffic Alert App, Performance Optimization, Crash Fixing, Play Store Deployment

I'm a solo Dev. I have more than 9 years of experience in Mobile development and web development. I have been working with the cross-platform framework React Native for 6 years and am still working. This is my main stack right now. I use TypeScript and JavaScript to make React Native apps. I tried the Flutter framework back in 2020, and I like it. I now use Flutter to develop cross-platform applications, and I like it more and more. I feel that I will soon switch completely to Flutter only! Flutter is less of a headache :) Back in 2012, I started my career as a front-end web developer with JavaScript. Since 2015, I started developing for Android applications, and after a year of work, I bought myself the first MacBook to make native applications for iOS. Do you remember Objective-C? I do)) I'm interested in long-term customer relationships, so I am ready to participate in your project from idea to production and provide high-level support after delivering the main work. - I have been using FlutterFlow as well since 2023, and I like it. So I can help you with FlutterFlow if you need it - I like web3 and already have experiance with cryptocurrency token launch and blockchain development Below is my humble list of tools I have experience with or enjoy working with: - React Native - TypeScript - Flutter - Dart - Swift - Kotlin - FlutterFlow - I can make a Native Swift/Kotlin component for React Native or Flutter - GitHub Actions I have used for CI/CD This is an easy way to automate tests and app delivery - Fastlane for CI/CD is the easiest way to automate tests and app delivery - Node.js - React.js - Redux - GraphQL - FastLane/circleci - RevenueCat - Firebase Cloud Firestore - Firebase Realtime Database - Firebase Remote Config - Firebase Cloud Functions - Firebase Authentication - FirebaseCloud Messaging - Firebase Hosting - Firebase Cloud Storage - Firebase Machine Learning - Firebase Dynamic Links I usually write autotests for code. I use these tools: - Jest - Mocha - Jasmine +++++Web3 development:++++++ - blockchain development - Crypto Wallet integrations - MetaMask integration - Alphawallet integration - Experience with coding competitions, e.g. ACM ICPC or Topcoder - cryptocurrency token launch - Casino Game development (including spinner, coinflip, lottery, splash, etc.) - I have already had experience in ChatGPT integration and other AI integrations. Other: - branch.io - ChatGpt integration - OpenAI - Sentry - Tokenscript - Heroku - AWS - DigitalOcean - DApps - retool - internal software development - DeFi projects - LayerZero Im not a Full-stack dev, but I have some experience with Python, Node.js and the Django framework!!!

🏆 𝗧𝗢𝗣 𝗥𝗔𝗧𝗘𝗗 𝗣𝗟𝗨𝗦 🏆 ✅ Mobile App Developer 7+ years of experience ✅ SaaS Mobile App Developer 5+ years ✅ 35 mobile app development jobs completed successfully ✅ Android and iOS Mobile Expert ✅ Built 27+ UX-first Mobile App development jobs for 22 companies ✅ On-Time and Cost-Effective Delivery ✅ Future-Proof Solutions Showing a Minimum 41% ROI ✅ 4354 mobile app development hours on Upwork and still counting ✅ 100% Job Success in mobile app development (Client Satisfaction Ratio) ✅ 98% of Clients Recommended working with me ✅ 80% Long-term Repeat Clients ✅ 7+ years of experience in mobile app development, 6 years experience in iOS mobile app development, 7 years experience in Swift and Kotlin, 4 years experience in Flutter, React Native, 2 years experience in KMM, KMP Full stack mobile app developer and mobile app UI UX designer with 7+ years of experience in Mobile App Development, specializing in iOS, Swift, Android, Kotlin, KMM, Kotlin Mutliplatform / KMP, React Native, and Flutter. I have successfully delivered 120+ mobile applications in different roles as mobile app developer, flutter app developer, flutter full stack developer, flutter flow, mobile app design, mobile ui ux designer, swift ios developer, android developer, kotlin developer, react native developer, mobile game developer achieving a 5-star rating on Upwork and helping clients scale their businesses with high-performance solutions. Apart from mobile app development, I specialize in Mobile App Design for both iOS and Android, as well as Web App Design for SaaS platforms. My expertise extends to Interaction Design, User Flow Design, and creating seamless User Experience (UX Design) and User Interface (UI Design). I follow a Design Thinking approach, ensuring every solution is user-centered and problem-solving. My process includes UI/UX Wireframing, Prototyping, and building Style Guides or UI-kits for consistent branding. I perform Design Audits and Design QA to maintain high standards across all projects. 🛠️ Design Tools: My designs come to life through powerful tools like Figma, Zeplin, and InVision for prototyping and collaboration. I leverage Adobe Illustrator, Adobe Photoshop, and Adobe XD for detailed visual design. For complex wireframes and flow mapping, I turn to Axure, Sketch, and Balsamiq. I also use Miro and Abstract for brainstorming and version control, while project communication and management happen in Slack and Jira. Our Expertise at a Glance • Mobile App Development: Android, iOS, & Cross-Platform App Development using Java, Kotlin, Swift, Objective C, Flutter, and more. • Website and Full Stack Development: Crafting seamless back-end experiences with .Net, Python, Java, Javascript, React.js, Angular.js, Node.js, MERN, MongoDB, PHP, etc. • Logo & UI/UX Design: Bringing your ideas to life with Adobe XD, Photoshop, Sketch, Figma, etc. • End-to-End Solutions: From logo design, UI/UX development, workflow setup, testing to deployment in app stores, we've got it all covered. We do not use v0.dev lovable.app CursorAI, Cursor, Windsurf, Trae, GitHub Copilot, Tabnine, Qodo, Devin AI, and AutoDev for speed up coding, we know other methods to do it efficiently. We offer a comprehensive range of development services across mobile, web, and cloud platforms. Our mobile app development expertise includes building Android and iOS applications using technologies such as Flutter, Swift, Objective-C, React Native, and Xamarin, optimized for both smartphones and tablets with a focus on cross-platform compatibility. In website and full stack development, we work with .NET technologies, including full stack .NET development, .NET Core, and Python with Django. Our team is experienced in developing both backend systems and user-friendly, responsive web interfaces, as well as working with various CMS platforms. Our DevOps and DevSecOps capabilities cover cloud infrastructure and automation, leveraging tools like AWS, Azure, Docker, Kubernetes, GitLab CI, Ansible, and Terraform to build secure and scalable deployment environments. We also build cross-platform and web applications using frameworks like Three.js and design tools such as Webflow, creating visually engaging and functional user experiences across devices. Additionally, we are well-versed in integration and automation tools, including WebSockets, data integration, the ABP Framework, Discord API, and Autotask, allowing us to create seamless connectivity and workflow automation between systems. Talent Good Knowledge, Talented, Experienced, Skilled, Strong Experience, Proven Experience, Agency, Team, Company, Specialist, Proven Track Record, Strong Background, Write Clean Code, Deep Expertise, Bring to Life, Cross-platform, Attention to Detail, Long Term. ⚡️ AVAILABLE FOR NEW PROJECTS ⚠️ Press Invite Button on my page and let's talk.

I’m a Senior Mobile App Developer with 12+ years of experience in Android Kotlin/Java and Flutter. I build production-ready mobile apps with clean architecture, strong performance, and long-term maintainability. My main expertise is Flutter app development, native Android Kotlin development, Firebase, REST APIs, GraphQL, AWS integration, background processing, offline support, push notifications, payments, subscriptions, and scalable app architecture. I also have strong experience in AI-powered mobile apps, including TensorFlow Lite, YOLO, SSD object detection, pose models, real-time camera processing, RTSP/IP camera streams, image processing, OpenCV, native C/C++, JNI/NDK, and Flutter platform channels. I have worked on apps across healthcare, construction, inventory, social platforms, AI camera systems, warehouse tools, and enterprise mobile products. My recent work includes AI camera apps, inventory/counting apps, Firebase-based transaction apps, voice-enabled medical workflows, and Flutter apps with modular clean architecture. I can help with building a Flutter or Android app from scratch, improving an existing app, fixing performance problems, reducing crashes/ANRs, integrating APIs, adding Firebase/AWS backend workflows, implementing AI/ML features, and handling Flutter-to-native Android integrations. I focus on practical engineering: clean code, clear communication, proper error handling, performance logs, memory optimization, and architecture that your team can maintain after launch. If you need a mobile developer who can handle both product delivery and deep technical implementation, I’d be happy to discuss your project.

💻 Long-term work for growing products - Java/Kotlin/Typescript Full Stack with 7+ years of working with international clients (US, Israel, Luxembourg, Kuwait...) across domains like eCommerce, payroll systems, adTech platforms, and enterprise web integrations. 🧠 Domain Expertise: - 🛒 eCommerce: Product catalogs, checkout flows, Stripe/PayPal, inventory sync - 🧾 Payroll Systems: Role-based dashboards, payroll calculation logic, secure HR workflows - 📊 AdTech: Campaign builders, analytics dashboards, API integrations - 🌐 Web Integration: 3rd-party API services (Twilio, Firebase, Google APIs), legacy system migration 🔧 Tech Stack: ✅ Backend: Java (11–25), Spring Boot 2 & 3, Quarkus, NestJS, Microservices, REST APIs, Firebase ✅ Frontend: Angular, Vue.js, React.js, HTMLX, TypeScript, JavaScript, GUI/UX-focused UI ✅ Databases: MySQL, PostgreSQL, MongoDB, Liquibase, Flyway ✅ Security & Scalability: OAuth2, KeyCloak, SonarQube, Load optimization (100K+ daily requests) ✅ DevOps: Docker, GitHub Actions, CI/CD pipelines ✅ Third-party Integration: Stripe, PayPal, Myfatoorah, Google APIs, Firebase API, Algolia Search, Twilio, Telnyx, Recaptcha,... 🌍 **International Collaboration** - Experience working across different time zones and work cultures - Strong English communication and proactive project ownership 🎯 Why clients work with me: - Fast onboarding & clean code - 100% Job Success | Trusted by long-term international clients - End-to-end delivery: Dev → Test → Deploy 📩 Let’s connect — I’d love to hear about your project!

I specialize in transforming ideas into high-performing, user-friendly Android apps. With expertise in Kotlin and Android development, I write clean, scalable code and deliver robust apps tailored to client needs. I stay updated on the latest tech trends to bring innovative, reliable solutions to every project. Whether you need an MVP or a fully-featured app, I focus on creating seamless user experiences and delivering results that align with your business goals—on time and within budget.