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Top Rated Plus | $200K+ Earned on Upwork | 100% Job Success | 10+ Years on Upwork I'm an Android Developer and Mobile App Developer with 12+ years of professional experience and a PhD in Computer Science. With $200K+ earned, 100% Job Success, and Top Rated Plus status on Upwork for 10+ years, I build production-ready Android and mobile applications that scale, not MVPs that fall apart under real user traffic. As an Android Developer, my core work covers native Android App Development in Kotlin and Java, full-lifecycle delivery from requirements and architecture through Google Play release, and backend integration with REST APIs, Firebase, AWS, and third-party services. I've shipped apps with 1M+ downloads. As a Mobile App Developer, I also deliver cross-platform solutions using React Native and Flutter when a project needs iOS and Android from a single codebase. As an Android Developer and Mobile App Developer, I've delivered across fintech, healthcare, logistics, social networking, sports, e-commerce, fitness, and entertainment. I also have extensive experience in healthcare and safety applications where data encryption, secure messaging, and compliance are non-negotiable. My architecture approach as an Android Developer is Clean Architecture with MVVM and MVP patterns, Kotlin Coroutines and Flow for async tasks, Hilt for dependency injection, and Jetpack Compose for modern UI. I use RxJava where legacy codebases require it and maintain CI/CD pipelines with Jenkins and TeamCity to keep releases reliable and predictable. As a Mobile App Developer and Kotlin developer, I take ownership of API planning with backend teams, code reviews, refactoring, and full technical documentation so the codebase remains maintainable long after delivery. I work as part of a team at Requestum, which means I can bring in backend, iOS, or QA specialists when a project needs more than one mobile app developer to ship on time. Clients typically work with me when they need: - an Android Developer to build a native Kotlin app from scratch to Google Play release - a Mobile App Developer to deliver iOS and Android from a single React Native or Flutter codebase - an Android App Developer to refactor, optimize, or extend an existing Kotlin or Java codebase - a Kotlin developer who understands Clean Architecture and can own the full technical roadmap - a mobile app developer with experience in fintech, healthcare, logistics, or social platforms If you need an Android Developer who ships production-grade apps and takes full technical ownership, let's talk. Main stack: Kotlin, Java, Android SDK, Jetpack Compose, Android Jetpack, Hilt, Kotlin Coroutines, RxJava, Retrofit, Firebase, AWS, Google Maps API, Stripe, React Native, Flutter, Room, Realm, Jenkins, Docker.

Flutter Developer with 2+ years building cross-platform mobile apps that ship to real users — not prototypes. My work is live on the App Store and Google Play right now. I specialize in production-grade Flutter & Dart development with Clean Architecture, BLoC/Cubit state management, and seamless REST API / WebSocket integration. If your codebase needs to scale — or your MVP needs to launch fast — I know both paths. What I've shipped: → Fintech app (My Savings Coach) — personal finance & lifestyle tracking with Plaid SDK integration, real-time WebSocket updates, JWT auth, and interactive Fl Chart dashboards → Sports coaching app (SWITCH5) — live on App Store and Google Play; roster management, in-game timers, score tracking → Social networking app (Neteject AB) — complex UI animations, Supabase backend, real-time data, feature-based Clean Architecture → RFX Soccer Recruit — AI-powered college soccer recruitment platform built with FlutterFlow; automated coach outreach, personalized dashboards, real-time feedback system; live on App Store → Astrology app — real-time content delivery via WebSocket, Bloc state management, scalable API architecture. My technical stack: Flutter · Dart · FlutterFlow · BLoC / Cubit · Provider · Clean Architecture · REST API · Dio · WebSocket · JWT · Firebase · Supabase · Freezed · GoRouter · AutoRouter · Figma · Git Industries I've shipped in: Fintech · Sports · Social · Health & Lifestyle · EdTech / Recruiting Every project I take on gets the same treatment: clean, documented code, pixel-perfect UI matched to your Figma, and communication that doesn't leave you guessing. I give weekly progress updates, flag blockers early, and don't disappear mid-project. Available for MVPs, feature development, and ongoing contracts. Tell me what you're building — I'll tell you how I'd approach it.

📱 I focus on Mobile Apps only. ⭐️ Expert-Vetted Media Buyer (Top 1% on Upwork) 🏦 120M+ Annual Revenue for all my clients in 2025. 🔥 I manage ad budgets of over $2M/month across all ad accounts. 📈 I'm happy to increase your revenue using paid ads. 📞 Let's have a short intro call to discuss how we achieve your goals! 𝗜 𝗳𝗼𝗰𝘂𝘀 𝗼𝗻 𝘁𝗵𝗲 𝗳𝗼𝗹𝗹𝗼𝘄𝗶𝗻𝗴 𝗽𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀: ▪️ Meta Ads (Facebook & Instagram) [since 2015] ▪️ TikTok Ads [since 2021] ▪️ Google Ads [since 2015] ▪️ Apple Search Ads (ASA) [since 2020] ----- 𝗜 𝘂𝘀𝘂𝗮𝗹𝗹𝘆 𝗱𝗲𝗮𝗹 𝘄𝗶𝘁𝗵: ▪️ Subscription Apps ▪️ Fintech (Forex, Trading, Crypto, Mobile Banking) ▪️ AI Apps ----- Additionally: - I can help you with ASO (App Store Optimisation and Google Play). - MMP Setup (Adjust, Appsflyer, Branch, Kochava) ----- 🤝 𝗜 𝗮𝗺 𝗮𝗶𝗺𝗲𝗱 𝗮𝘁 𝗹𝗼𝗻𝗴-𝘁𝗲𝗿𝗺 𝗰𝗼𝗼𝗽𝗲𝗿𝗮𝘁𝗶𝗼𝗻. 📞 Let's make a short call/chat to discuss your project in detail.

✔️ 15+ Years Programming | ✔️ 11 Years Unity | ✔️ Mobile 2D Games | ✔️ AR/VR Senior Unity developer specializing in mobile 2D games and immersive AR/VR applications for iOS and Android. I deliver complete, production-ready products — from architecture to store submission. 🎮 What I build: 2D mobile games — casual, hyper-casual, puzzle, arcade AR apps — ARKit, ARCore, Vuforia, EasyAR, ARFoundation VR apps — Oculus / Meta Quest, Dream VR Cross-platform builds — iOS & Android (App Store + Google Play) Multiplayer — Photon PUN/Fusion Monetization — AdMob, Unity Ads, in-app purchases 🛠 Tech Stack: Unity3D · C# · C++ · Java · ARKit · ARCore · Vuforia · EasyAR · Oculus SDK · Photon · Firebase · Git ✅ Why work with me: Full-cycle development — concept to live on store Mobile-first optimization — smooth on mid/low-end devices Clean, maintainable code — easy to extend after delivery Fast communication, reliable deadlines

I'm an Android Developer / Mobile Developer with 10 years of experience helping small businesses and startups translate their vision into scalable, high-performance apps from 0 to launch using the latest technologies ( Kotlin , Coroutines , Jetpack Compose , Jetpack libraries , Kotlin Multiplatform ). I specialize in: - on-device AI integration using MediaPipe / TFLite / Google ML Kit (Object detecton , Face and pose detection , Text summarizing / OCR , text-to-speech , speech-to-text , etc.); - building media, social, and everyday tools (not games); - fixing app performance , memory leaks , crashes and ANRs , especially in complex or “vibe-coded” apps. 🌟🌟🌟🌟🌟 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

I don't just write React Native code. I ship apps people actually use. 1M+ downloads. 30+ countries. 200+ projects. 100% Job Success. Most clients come to me when their React Native app is stuck, broken, or half-built and nobody else could finish it. Or when they need a mobile app developer who handles everything from first screen to App Store and Google Play launch. Some come with an MVP idea and need a react native developer who moves fast without cutting corners. Others come because their react native mobile app has performance issues or complex integrations nobody else could solve. I've been doing this for 8+ years, delivered 200+ projects, and the apps I've built as a mobile app developer now serve 590K+ users across 30+ countries. WHAT I BUILD As a react native developer and react native engineer I cover the full mobile lifecycle across 200+ shipped products: ✦ React Native mobile apps with Expo and CLI for iOS and Android ✦ React Native Expo MVPs shipped from first screen to App Store and Google Play ✦ React Native Firebase integrations — auth, Firestore, real-time sync, push notifications ✦ React Native Supabase backends and React Native Node.js APIs that scale with the product ✦ AI mobile app development with OpenAI API, real-time features, and on-device intelligence ✦ In-app purchases, RevenueCat subscriptions, AdMob, deep linking, and push notifications ✦ Native Swift and Kotlin modules and android kotlin integrations when cross-platform isn't enough ✦ App Store and Google Play submissions including rejections, TestFlight, and review handling I work as a react native full stack developer so clients don't need to hire two separate people. Firebase, Supabase, and Node.js on the backend — one team, one codebase, one point of contact. INDUSTRIES I've shipped products as a mobile app developer and mobile application developer across multiple verticals. In Fintech and Crypto I built a trading platform with 590K+ registered users and 2M+ monthly visitors. In Healthcare and Wellness I delivered apps with 100K+ downloads, a 4.9 App Store rating, and users across 30+ countries. In EdTech I shipped language learning and trivia apps that together reached 1M+ downloads. I've also delivered E-commerce, SaaS MVPs, Hospitality, and On-demand platforms: ✦ Fintech and Crypto — 590K+ users, 2M+ monthly visitors ✦ Healthcare and Wellness — 100K+ downloads, 4.9 App Store rating, 30+ countries ✦ EdTech — 1M+ downloads across 30+ countries ✦ E-commerce and Marketplace ✦ SaaS and Startup MVPs ✦ Hospitality and On-demand Services WEB AND FULL STACK On the web side I work as a react developer and front end developer building platforms with React, Next.js, and Node.js. I've delivered react nextjs products, full stack developer react node systems, and full stack developer ai projects with LLM integrations and OpenAI workflows. I've worked alongside Vue and Angular codebases and helped clients migrate from WordPress to modern React stacks. On larger projects I work as a web developer delivering both mobile and web from the same team. Clients who need an app developer ios android with full backend ownership also work with me on ios android developer projects. I collaborate with flutter developer and android developer teams when needed, and I structure codebases that a python developer or backend node.js team can extend later. WHY CLIENTS WORK WITH ME ✦ 8+ years as a react native developer and mobile app developer — 200+ projects, 1M+ downloads, 30+ countries ✦ React native full stack developer — mobile frontend and backend in one engagement ✦ Fast at complex bugs, App Store rejections, and performance issues others couldn't fix ✦ Clear written communication and honest timelines, no surprises ✦ Available after launch for support, new features, and scaling WHAT CLIENTS SAY "Michael is an outstanding react native developer — skilled, reliable, and delivers clean, efficient code." "Succeeded on complex React Native bugs where others failed." "Exceeded our expectations." If you're looking for an experienced react native developer and mobile app developer who gets things shipped — press Invite or send a message.