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As Android Developer / Mobile Developer with 10 years of experience I'm helping small businesses, startups, and indie founders translate their vision into scalable, high-performance apps from 0 to launch, launch MVP in weeks, integrate on-device AI and upgrade apps to comply with the latest Google Play requirements. In 2026 I specialize in: - on-device AI integration using MediaPipe / LiteRT / Google ML Kit ( Object detecton , Face detection , Pose detection , Text summarizing / OCR , text-to-speech , speech-to-text ); - video / media editing apps ( FFMpeg , AndroidX Media3 ); - building media , social , and productivity 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

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.

Mobile app developer with 14+ years of mobile app development, 80+ apps shipped, and a Flutter app past 2M+ users. ⭐ Top Rated on Upwork since 2018 · 5.0 on Clutch · 4.93 on GoodFirms If you're starting a Flutter app from scratch, I take it from concept to the App Store. If your iOS or Android app has stalled, I get it shipping again. If a previous mobile app developer missed what you actually needed, that's where I usually come in. 𝗪𝗵𝗮𝘁 𝘆𝗼𝘂 𝗴𝗲𝘁 ✔️ As a Flutter developer I ship one codebase to iOS and Android at once, up to 40% cheaper than two native builds. ✔️ The mobile app design and the mobile app development come from the same person. No handoffs, no two contractors blaming each other. ✔️ Healthcare apps that pass HIPAA and GDPR. Logistics apps that keep working when the signal drops. ✔️ Hire the wrong mobile app developer and the scope gaps surface at the first build. I flag them earlier, and clients have brought me in to redo exactly that. ✔️ 80+ apps in, I have already hit the problems your build will run into. One app I built passed 2M+ users. Send me what you're building and I'll reply with a scope estimate and the first technical decision I'd settle. Clients come back a year in after hiring the wrong mobile app developer first; early hires save months. 𝗥𝗲𝗮𝗱𝘆 𝘄𝗵𝗲𝗻 𝘆𝗼𝘂 𝗮𝗿𝗲 Best, Stan ————— Selected work and skills: HEALTHCARE APP DEVELOPMENT, 25+ projects - Healthcare App Developer, Secure Care UK medical transport: 5,000+ secure patient transfers a year across a 25+ vehicle fleet and a 24/7 control room. - HIPAA Developer, secure PHI handling for 5,000+ patient records - HL7 FHIR syncing records across 3 hospital systems - GDPR compliance on 100% of builds - Healthcare Apps prompting status updates every 30 minutes across 4 job levels - Healthcare SaaS development, Secure Care UK: replaced a third-party subscriber platform, cutting running costs $3,000+ a month. - Full Stack Developer Healthcare, Secure Care UK across web and mobile: 5,000+ transfers coordinated from one system. - Flutter developer, Patient Gateway UK medical transport: Firebase sync and real-time driver tracking with dispatch updates under 5 seconds. - Flutter Developer, Rheo health wearable: 5 vital-sign categories streamed over LTE in real time, secure PHI handling tested across iOS, Android, and web. - Mobile App Developer, fertility health app: bug-free rate raised 85% to 96% in a two-week retest, delivered in 3 months against a 4-month estimate. LOGISTICS APP DEVELOPMENT, 20+ projects - Logistics App Developer, last-mile delivery app: satisfaction raised 35% to 85%, wait times cut 34% in low-signal areas, 12 partners signed in 3 months. MOBILE APP DEVELOPMENT, 80+ apps - Flutter developer, mobile app development: 30+ Flutter projects, build cycles cut 50% and costs 40% versus native through Flutter development. - Flutter App Developer, Ziroop: 2 app stores from one Flutter codebase, 50,000+ installs in year one. - Mobile App Developer, Quran learning app: 2M+ users, rebuilt in 4 months. - Flutter Developer, government train ticketing app: shipped in 6 months against a 7-month deadline, NFC storing 5 tickets offline across 20 screens. - iOS Developer and Swift iOS Developer: native iOS apps shipped since 2012 in Swift, one rebuilt to full feature parity in 8 weeks. - Android App Developer: rebuilt an unstable Android app, crashes cut 90% and store rating lifted to 4.7. - Mobile app developer, Android Developer and Mobile Developer: native and cross-platform mobile development across 80+ apps. FULL STACK - Full Stack Developer: 150+ products shipped end to end, frontend, backend, and database. - Full Stack Mobile Developer: frontend plus backend on 30+ products, delivered end to end. MOBILE APP DESIGN, 40+ designs - Mobile app designer, mobile app design: 70+ wireframes and 40+ mobile app designs, engagement up 40%. - Mobile UI UX Design: consistent UI across both platforms on 40+ screens, task completion up 30%. - Mobile App UI UX Design in Figma: Figma App Design and Figma Mobile App Designer work across 35+ flows. REACT NATIVE - React Native Developer and React Native Development: 10+ React Native apps on the App Store and Google Play as a React Native Developer Expo, React Native App Developer, and React Native Expert, spanning React Native Expo, React Native iOS, React Native Firebase, and React Native UI UX, with 12-19% better repeat usage. MORE - AI App Developer and AI Mobile App Developer: AI Mobile App Development adding on-device intelligence that cut manual work 60%. FlutterFlow developer prototypes built 3x faster in FlutterFlow. Full Stack App Developer with Python and Wordpress backends, React Native, and mobile React apps across 30+ products. SKILLS: iOS Development, Android App Development, Swift, Node.js, PHP, JavaScript, Java, Desktop Application, Web Design.

Are you looking for an expert Android Developer to build a high-performance, cross-platform mobile application? As a Senior Android Developer specializing in Kotlin Multiplatform (KMP) and Compose Multiplatform (CMP), I help businesses launch native-quality apps while reducing Mobile App Development costs by up to 50%. By sharing business logic across Android and iOS, I ensure your project is scalable, maintainable, and built for long-term success. 🚀 AI-Powered Android App Development Velocity I leverage an advanced AI-augmented workflow (Cursor, MCP, and Gemini/Claude) to accelerate the Mobile App Development lifecycle. This allows me to: - Code Faster: Automate boilerplate so I can focus on your app's unique architecture. - Increase Accuracy: Use AI-driven refactoring to ensure your Android App is bug-free. - Rapid Prototyping: Deliver production-ready MVPs in record time without sacrificing native performance. 🚀 Core Expertise To deliver world-class Mobile App Development, I utilize a cutting-edge tech stack: - Kotlin Multiplatform (KMP): Expert-level sharing of business logic, networking, and data layers. - Compose Multiplatform (CMP): Designing 100% shared, responsive UIs for Android, iOS, and Desktop. - Native Android: Jetpack Compose, Material 3, Coroutines, and Flow. - Architecture: MVI/MVVM Clean Architecture for scalable, testable codebases. - Smart Notifications: Implementing complex Push Notification strategies, including rich media alerts, deep-linking, and background data synchronization. 🛠️ Technical Stack - Languages: Kotlin, Java, Swift (Interop). - DI & Local Data: Koin, Hilt, SQLDelight, Room. - Networking: Ktor, OkHttp, REST, WebSockets, Apollo GraphQL. - Real-Time & Media: WebRTC (Audio/Video), Twilio, PJSIP, Jitsi, Firebase Services. - Hardware & IoT: Bluetooth (BLE), Geolocation, Maps, and Sensor integration. 💼 Why Choose Me as Your Lead Android Developer? - Top Rated Plus: 100% Job Success Rate and a veteran Android Developer of the Upwork platform. - End-to-End Delivery: From initial concept and architecture to successful Play Store/App Store deployment. - Proven Experience: Numerous commercial projects and a deep portfolio of open-source work on GitHub. - Scalable Solutions: Experience building complex features like WebRTC, Biometrics, and IoT integrations. Whether you need a Kotlin specialist to refactor an existing codebase or a Mobile App Developer to build a cross-platform solution from scratch, I provide the technical leadership your project deserves. 📩 Let’s build your next-gen mobile app. Click the "Invite to Job" button to discuss your requirements and see how my AI-augmented workflow can save you time and budget!

Hey Guys! I’m an Android Developer Kotlin dedicated to helping startups and businesses build high-performance mobile applications. Interested? Drop me a message, and I’ll show you my workflow and how I can help your project thrive! What Android Developer Kotlin Do: ⚪️ Android Kotlin Development: Creating native apps for Android using Kotlin and Java modern UI. ⚪️ App Performance: Optimization, bug fixing Android App , and improving Mobile Develop stability. ⚪️ API Integration: Working with Full Stack teams, REST APIs, and real-time features. ⚪️ App Support: Feature updates for iOS and Android, refactoring, and long-term maintenance. I build Android apps that are not just functional but ready for production. Whether you need a native Android Developer to build from scratch or a Kotlin Developer to scale your current Android App product, I ensure the code is clean and predictable. While I focus on the Android Developer Kotlin Java ecosystem, I understand the importance of cross-platform alignment with iOS, Swift, and Flutter. What I Specialize In Android App Development ✔️ Kotlin Developer expertise: Native development for Android apps. ✔️ Android Developer Kotlin Java standards: Clean Architecture, MVVM, modular structure ✔️ Jetpack components (ViewModel, LiveData, Navigation) and Android Screen Reader support. ✔️ Coroutines and background processing for Mobile Developer projects. ✔️ Room database, SQLite, and local storage. Backend & Integrations ✔️ REST API integration and data handling with Spring Boot or JSP Developer backends. ✔️ Firebase (Auth, Firestore, Push Notifications) and Marketing Cloud Developer tools. ✔️ Salesforce Marketing Cloud Developer triggers and external SDKs. ✔️ WebSockets and real-time updates for Mobile Develop solutions. UI & UX ✔️ Modern UI with XML and Jetpack Compose for any Android Developer India or global project. ✔️ Responsive layouts that match the quality of an iOS Developer or Swift specialist. ✔️ Material Design implementation for iOS Android hybrid feel when needed. ✔️ Perfect user flows, even for complex systems like Magento integrations. Testing & Stability ✔️ Debugging and performance optimization across Bulgaria and international markets. ✔️ Memory optimization and Full Stack Developer level code cleanup. ✔️ Transitioning legacy code from Java Developer to modern Kotlin. ✔️ Web Developer collaboration for seamless API handshakes. Tech Stack: ✔️ Languages: Kotlin, Java, Javascript Developer (API-side), Python Developer (Backend-side). ✔️ Platforms: Android, iOS, Flutter, React Native. ✔️ Architecture: MVVM, Clean Architecture, Full Stack. ✔️ UI: XML, Jetpack Compose, Flutter Developer insights, iOS Developer UI standards. ✔️ Database: Room, SQLite, Java Developer legacy support. ✔️ Other: Google Maps API, Payments, IOS integrations, Bulgaria localized services. Android Developer Kotlin focus on delivering Android App working apps with clear logic, stable performance, and code that is easy to maintain. Whether you are looking for a Mobile Developer or a dedicated Android Screen Reader accessibility expert, I've got you covered. Have a project in mind? Click “Invite”, share what you’re building, and I’ll let you know how I can help.

• 5+ years of experience as a Mobile App Developer specializing as an Android Developer and Flutter Developer. • Strong expertise as a Mobile App Developer with deep knowledge of Android Kotlin, Java, and Dart. • Proven background as an Android Developer and Flutter Developer across FinTech, AdTech, and EdTech projects. • Hands-on experience as a Mobile App Developer integrating third-party APIs for scalable applications. • Solid architectural mindset as an Android Developer focused on performance and UX. Are you looking for a reliable Mobile App Developer who can also act as a senior Android Developer or an experienced Flutter Developer? 🚀 I bring extensive hands-on expertise as a Mobile App Developer, delivering high-quality solutions as both an Android Developer and Flutter Developer. Whether you need a native Android solution or a cross-platform app, I’m ready to help. 📱 Android Developer Expertise As an Android Developer, I’ve delivered multiple production-ready applications with a focus on scalability and clean architecture. My experience as a Mobile App Developer allows me to approach Android development from both technical and product perspectives. Android Toolkit (Android Developer focus): • Java & Kotlin — core stack of every Android Developer project • XML, Material Design, Jetpack Compose — essential tools for any Android Developer • SQLite & Room — data handling by an experienced Mobile App Developer • Retrofit, OkHttp, Gson — API integration as a professional Android Developer • Dagger & Hilt — clean architecture every Android Developer should follow • Coroutines & Flow — asynchronous programming mastered by a senior Mobile App Developer Each app I build as an Android Developer meets high standards of performance and maintainability. 🌐 Flutter Developer Mastery As a Flutter Developer, I build fast, consistent cross-platform applications with a native feel. My role as a Mobile App Developer helps ensure business logic and UI remain aligned across platforms. Flutter Toolkit (Flutter Developer focus): • Dart & FlutterFlow — core stack of every Flutter Developer • Firebase Auth, Google & Apple Sign-In — secure solutions from a Flutter Developer • Google Maps API — location-based features by an experienced Mobile App Developer • Firebase Cloud Messaging — real-time updates from a senior Flutter Developer • BLoC & Riverpod — scalable state management used by every strong Flutter Developer Whether it’s CRM, LMS, or EdTech, I deliver results as a Flutter Developer with product thinking. 🏗️ Architecture & Best Practices As a Mobile App Developer, I apply proven patterns: • MVP, MVC, MVVM, MVI — standard for every Android Developer • BLoC & Riverpod — best choice for a scalable Flutter Developer workflow Clean architecture is a must for any professional Mobile App Developer. 🔒 Security & Performance Every Mobile App Developer project I deliver focuses on: • Data encryption • Performance optimization • GitHub, GitLab, Azure workflows This mindset separates a senior Android Developer and Flutter Developer from the rest. 💻 Databases & Experimentation As a versatile Mobile App Developer, I work with: • SQLite • PostgreSQL • Firebase I continuously experiment to grow as an Android Developer and Flutter Developer. 🎯 Let’s Build Your App If you need a results-driven Mobile App Developer, a reliable Android Developer, or a skilled Flutter Developer — let’s connect and turn your idea into a production-ready application.