Need someone who can build, stabilize and scale your Android product? You just found him 🤝 📊 12+ years in mobile delivery 📊 20+ Android-focused projects 📊 10+ years supporting regulated and business-critical products 📊 Experience with compliance-ready apps, secure payments, backend-heavy systems and Software Development I help companies create secure, maintainable, high-performance apps for Healthcare, FinTech and consumer products. Core Expertise 🔹 Native Android engineering with modern architecture and Software Design 🔹 Kotlin-first development with maintainability in mind 🔹 Legacy modernization from Java to Kotlin 🔹 Secure integrations, performance tuning, release stability 🔹 Product delivery for Healthcare, FinTech, consumer platforms and Mobile App Development I’m an android developer focused on products where reliability and clean architecture matter. As a kotlin developer, I build scalable solutions with android kotlin best practices, Jetpack tooling and AOSP awareness. Clients come to me for android developer kotlin expertise when they need stability, lower technical debt and growth. I work as an android app developer on products that need more than interface implementation. I support teams with android app development for secure solutions where every android app stays maintainable after launch. My background: improving an android application used by thousands of users, integrating backend systems, payment flows, and healthcare-grade data handling. That is why companies hire me as an android mobile developer ( android mobile app developer ) when they need delivery. What I Do Best ✅ Android development using Kotlin and Java ✅ Architecture design with MVVM, Clean Architecture, modularization ✅ Backend communication, authentication and payment integrations ✅ Performance optimization, debugging, maintenance and release support ✅ Application Improvement for live mobile products ✅ Solo delivery or collaboration inside a larger team My strongest specialization is android developer kotlin work. I often join teams that need android developer kotlin java skills to modernize legacy code, migrate modules, and improve release quality without a full rewrite. That work benefits from practical experience as a java developer and from thinking like an android kotlin developer who can handle new features and stabilization. Relevant Experience Highlights 🔸 Healthcare mobile applications with compliance-aware architecture 🔸 Performance optimization and crash-rate reduction 🔸 Secure data handling and app stability improvements 🔸 Secure apps with payment integration and transaction-safe flows 🔸 Backend integrations with PHP, Python, JavaScript, and REST APIs 🔸 Collaboration with iOS, backend, QA, and web teams 🔸 Ability to scale from one engineer to a delivery team I also have experience with android ble and android bluetooth features for pairing flows and reliable data exchange. Whether I contribute to an android mobile app or support an existing codebase as a mobile developer, I focus on release readiness. Tech Stack 🔸 Android kotlin with Jetpack, Compose, Android SDK, AOSP 🔸 Java, Firebase, secure cloud services, CI/CD 🔸 REST APIs, secure auth, payment gateways 🔸 Node.js, JavaScript, C#, SQL for backend alignment 🔸 Git, Android Studio, release workflows, crash analysis 🔸 MVVM, Clean Architecture, modular apps, scalability-first mindset My work is rooted in native Android, but I also understand broader product ecosystems. I collaborate effectively as an ios developer ( ios app developer ) when cross-platform alignment matters, including iOS Development discussions with teams using Swift. I have worked alongside teams using react native and reviewed delivery implications where flutter developer was involved, though I do not present those as my core specialization. That exposure helps me operate as an android developer and product-minded mobile app developer within cross-functional teams. Team & Product Collaboration 🔹 Coordination with a rest api developer 🔹 Alignment with web application development 🔹 Communication with a web developer or front end developer 🔹 Familiarity with database builder, django, and python automation Support I Can Provide ✔️ Build a mobile app from scratch ✔️ Join an existing product as an app developer android ✔️ Refactor legacy code and modernize architecture ✔️ fix android application bugs and improve release readiness I do not position myself as a wordpress, magento, game developer or unreal engine specialist and I do not use unrelated positioning such as android developer india. Even when someone types android develoer, they usually need a senior specialist who can take ownership. I built mobile applications for autism-related projects with intuitive user experience. 📬 If you need an android developer who can improve an existing product, build a reliable solution from scratch or support growth with kotlin developer depth, send me a message.

👋 Hi there ! Looking for an elite Senior Android Developer to architect, secure, and scale powerful Android applications? With 20+ years in native Android development, I've worked across every major SDK, library, and device evolution - delivering fast, secure, and maintainable apps that perform under pressure. I’ve developed and launched 100+ Android apps with over 20 million total downloads and an average Google Play rating of 4.8+. My work has helped reduce crash rates by 70%, shrink APK sizes by up to 60%, and increase app startup speed by 45%. From startups to Fortune 500s, I’ve led 12+ dev teams in delivering mission-critical, high-ROI apps for fintech, defense, media, and beyond. 🏆 Why Work With Me for Android Development? ✔️ 20+ years of deep Android expertise with Java, Kotlin, Jetpack, and NDK ✔️ Delivered 100+ apps to production — 20M+ installs, 4.8+ average rating ✔️ Reduced load times by 45% through advanced performance profiling ✔️ Security-hardened apps using R8, ProGuard, LLVM, NDK, and SELinux policies ✔️ Scaled enterprise-grade apps with 99.99% uptime and real-time data sync ✔️ Played key roles in HIPAA-, FIPS-, and PCI-DSS-compliant mobile solutions 🚀 Core Android Development Services: 📌 Native Android App Development 🔹 Expert in Kotlin, Java, Android SDK, Jetpack Compose, View System 🔹 Responsive UIs across all screen sizes using ConstraintLayout, MotionLayout, Compose 🔹 Modular architecture (MVVM, Clean Architecture, MVI, VIPER) 🔹 Advanced state handling with LiveData, Coroutines, Flow, RxJava 🔹 CameraX, MediaCodec, ExoPlayer for media-heavy apps 🔹 Full device compatibility from Android 5.0+ through latest Android 14 📌 Android Security & Low-Level Optimization 🔹 Obfuscation, code hardening, and NDK-level protection 🔹 Reverse engineering mitigation via Frida/Root detection 🔹 Low-level optimization with ARM NEON, RenderScript, JNI, and custom kernels 🔹 SELinux customization for hardened AOSP builds 🔹 Hardware integration with sensors, gyroscopes, accelerometers, and BLE 📌 Multimedia, Games & Streaming 🔹 Real-time video/audio with FFmpeg, OpenGL, Vulkan, MediaCodec 🔹 Game engines: Unity3D, LibGDX, custom OpenGL renderers 🔹 Augmented Reality with ARCore, face tracking, 3D overlays 🔹 Advanced drawing tools, canvas-based animation, real-time filters 📌 Backend Integration & Architecture 🔹 REST, GraphQL, gRPC, WebSockets, Firebase, and custom socket protocols 🔹 Secure data sync, push notifications (FCM), and analytics (Firebase, Amplitude) 🔹 CI/CD pipelines using Jenkins, Bitrise, GitHub Actions, and custom Gradle workflows 🔹 Offline sync and caching strategies for resilient performance 📌 Scalable Architecture & Cross-Platform 🔹 Kotlin Multiplatform, Clean Architecture, modularized multi-feature apps 🔹 Deep understanding of Android App Bundles, Play Feature Delivery, and Instant Apps 🔹 Flutter experience for select cross-platform needs (Dart/Flutter SDK) 📌 Database & Networking 🔹 SQLite, Room, Realm, SQLDelight, Firebase Realtime/Firestore 🔹 JSON parsing with Gson, Moshi, org.json 🔹 API integration using Retrofit, OkHttp, Apollo Client 🌟 Results-Driven Impact ✅ 70% reduction in crash rates using advanced testing and monitoring ✅ 45% increase in startup speed through bytecode and resource optimization ✅ 60% smaller APK sizes using modularization and build optimization ✅ 50% faster delivery cycles using custom CI/CD pipelines ✅ 40–65% increase in user retention through performance and UX refinement ✅ 99.99% stability in live apps with over 1M monthly active users 💡 Focused On What Matters Most: ✔️ Clean, scalable, testable code that teams can maintain and extend ✔️ Proactive debugging and crash prevention strategies ✔️ User-first experiences built for performance and engagement ✔️ Modern, maintainable app structure that grows with your business ✔️ Full lifecycle support-from idea to Play Store launch and beyond 🚀 Ready to Build a High-Performance Android App? Let’s talk! Whether you're starting from scratch, rebuilding a legacy app, or scaling for millions-I'll help you build it right, fast, and with precision.

🏆 𝐓𝐨𝐩-𝐑𝐚𝐭𝐞𝐝 𝐏𝐥𝐮𝐬 𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 (𝐓𝐨𝐩 𝟏𝟎%) 🏆 | 𝟏𝟎𝟎% 𝐉𝐨𝐛 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 𝐒𝐜𝐨𝐫𝐞 | 𝐢𝐎𝐒 & 𝐀𝐧𝐝𝐫𝐨𝐢𝐝 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 | 𝐒𝐰𝐢𝐟𝐭 | iOS App Developer Swift | 𝐊𝐨𝐭𝐥𝐢𝐧 | Android App Developer Kotlin | 𝐑𝐞𝐚𝐜𝐭 𝐍𝐚𝐭𝐢𝐯𝐞 | 𝐅𝐥𝐮𝐭𝐭𝐞𝐫 | 𝟖+ 𝐘𝐞𝐚𝐫𝐬 I’m a Mobile App Developer focused on building scalable, secure, and production-ready mobile products for iOS and Android ecosystems. My work combines mobile app development, mobile app design, clean architecture, API integrations, Firebase workflows, authentication, analytics, payments, push notifications, and long-term product support. I focus not only on features, but also on performance, stability, maintainability, and business growth. As an iOS App Developer Swift specialist, I deliver native Apple ecosystem solutions through Swift, ios development, ios mobile app development, ios swift engineering, App Store readiness, watchos, apple watch, watchkit, and smart watch integrations. My iOS experience covers MVPs, product recovery, scalable production systems, enterprise apps, and secure ios applications. As an iOS App Developer Swift expert, I focus on polished UI, reliable architecture, optimized performance, and maintainable code. As an Android App Developer Kotlin specialist, I build native Android apps using Kotlin, android app development, android development, modular architecture, Firebase, APIs, payments, analytics, authentication, and production-ready release workflows. My Android App Developer Kotlin work includes scalable android app, android app developer, android application, and complex mobile ecosystems designed for long-term growth. As an Android App Developer Kotlin expert, I focus on clean architecture, stable performance, security, and maintainable Android products. I work as an iOS App Developer Swift and Android App Developer Kotlin for businesses that need reliable native mobile development, strong technical decisions, and product-focused delivery. This native expertise helps create secure ios and android solutions for fintech, e-commerce, booking platforms, fitness, health, taxi, transportation, delivery, dating apps, social media app, live streaming app, video streaming systems, AI-based mobile systems, SaaS, business apps, wearables, and IoT. When product goals require faster launch or flexible delivery, I also support react native mobile, react native developer, react native expert, react native app, react developer, react js, react redux, react node, react native firebase, cross platform mobile development, cross platform mobile, hybrid app, hybrid app developer, flutter, flutter developer, flutter dart, flutter firebase, and flutter app workflows. ⭐️⭐️⭐️⭐️⭐️ “Reliable mobile app developer delivering stable releases. From MVP recovery to scalable production systems.” 🎯 What I bring: ✔️ 8+ years as a mobile app developer across full mobile app development lifecycles. ✔️ Strong iOS App Developer Swift background for native ios app, ios developer, senior ios developer, ios app developer, and scalable swift ios development. ✔️ Strong Android App Developer Kotlin background for native android developer work, kotlin developer workflows, android app development, and enterprise Android delivery. ✔️ Experience with API integrations, Firebase, authentication, analytics, payments, push notifications, backend coordination, wordpress, shopify, and mobile app marketing. ✔️ Product collaboration with mobile app designer, mobile app developers, product teams, and business stakeholders. 📱 Mobile Applications I Develop: • Taxi & Transportation Apps • Booking platforms • Fitness & Health Apps • AI-based mobile systems • Security-focused ios and android solutions • Fintech & Payments Apps • E-commerce apps connected with wordpress and shopify • Business & SaaS applications • Social media app, live streaming app, and video streaming platforms • Wearables & IoT systems with watchos, apple watch, watchkit, and smart watch • Delivery and Dating Apps 🚀 Technologies & Skills I architect scalable ecosystems combining native and cross-platform engineering. iOS App Developer Swift products are powered by Swift, ios developer swift workflows, ios development, ios swift delivery, App Store readiness, and iOS App Developer Swift expertise. Android App Developer Kotlin products are powered by Kotlin, android application architecture, Firebase, API connectivity, and Android App Developer Kotlin expertise. I also deliver react native, flutter, hybrid app, and cross platform mobile ecosystems. As an iOS App Developer Swift professional, I help teams build polished iOS applications that are easy to scale. With both iOS App Developer Swift and Android App Developer Kotlin expertise, I support full-cycle mobile app development. iOS App Developer Swift and Android App Developer Kotlin delivery stays production-focused. 📩 Ping me. Let’s build something great.

Hi, I’m a dedicated Android & iOS developer with 3 years of experience building practical, user-friendly apps. I specialize in Java, Kotlin and the Android SDK, and I follow best practices using MVVM architecture, Firebase, and REST APIs. 😎 In addition to native Android development, I have strong experience in cross-platform app development using Flutter and FlutterFlow. I’ve built and deployed scalable apps for both platforms, integrating Firebase services like Authentication, Firestore, Cloud Messaging, and Analytics to power real-time, secure, and engaging user experiences. Tech stack/Latest experience: ✅ Flutter: Cross-platforming development of IOS/Android applications. ✅ Android: Crafting seamless and intuitive mobile experiences for the Android platform. ✅ React & Angular: Designing responsive and feature-rich web applications using popular frontend frameworks. ✅ Java 17: Harnessing the power of Java to build robust and scalable mobile applications. ✅ Kotlin: Utilizing Kotlin's modern features for efficient Android development. ✅ Spring & Spring Boot: Developing scalable and high-performance web applications with the Spring framework. ✅ REST: Building RESTful APIs for seamless communication between web services. ✅ Quarkus: Leveraging Quarkus for lightweight and fast Java-based microservices. ✅ Kafka: Implementing event-driven architecture for real-time data processing and streaming. It would be great to speak more with you and receive the necessary info about the rapid job with short timeline or comprehensive and high-complexity long-term project. Now I am expanding my portfolio, a lot of works under NDA – so for now I need to create an Upwork portfolio – and apply my 10+ years high-level experience 🤩 Let's have a quick talk and discuss everything! 🤝

✌️ Strong focus on creating stable, scalable, user-centered Android mobile ecosystems - that's me, your Android Developer with deep experience in Android Development. As an Android App Developer and Mobile App Developer, I deliver solutions across industries, ensuring each product has clean architecture, solid performance and intuitive user experience. As an Android Developer Kotlin, my team and I build Android apps (phone and tablet) of any complexity - delivery/ordering systems, logistics apps, marketplace apps, video/chat apps (WebRTC/VoIP), booking apps, online TV apps, educational apps, online stores, AndroidTV apps, and Mobile App Development with in-app purchases and subscriptions. 📈 As an Android Developer I turn product ideas into fast, reliable Android apps users love. As a Mobile Developer I build clear, maintainable solutions that scale. As a Mobile App Developer, I deliver end-to-end Mobile App Development: requirements, architecture, implementation, testing, App Store/Play Store deployment and post-release support. 🔮 My work as an Android Developer focuses on Kotlin, Java, Android SDK, Android Studio, Jetpack Compose, MVVM and Clean Architecture for robust code and smooth UX. As an android developer kotlin I integrate Firebase, RESTful APIs, user authentication, local and remote databases, push notifications and performance monitoring through Android Development. As an android developer kotlin, I treat Git, SQL and structured API Integration as daily tools, not extras. Although my primary title is Android Developer, I bring cross-platform knowledge as a Mobile Developer and Mobile App Developer from ios development, Swift, Objective-C, Apple Xcode, SwiftUI and react native collaboration, which helps me coordinate Android Development with ios developer teams. As an android developer kotlin, I work alongside react native, flutter developer and web developer teams, and understand JavaScript, React, PHP, Node.js, WordPress and full stack developer needs. This makes me an Android App Developer who bridges backend, frontend and app developer ios android teams for faster delivery. 🦾 As an Android Developer and ai mobile app developer I've improved onboarding flows, increased conversion by 16% and reduced crash rates by 40%. As an Android Developer, a Mobile App Developer for Android Development, I prioritize code quality and measurable results. I am a mobile application developer experienced in Android App Development, Kotlin, Java and Firebase, and a Mobile Developer who collaborates with android game developer, ios developer, flutter developer, react native and ios development teams. As an android developer kotlin, Android App Developer and Mobile Developer, I'm comfortable on ai mobile app developer and ai chatbot developer projects, and coordinating with bubble io certified developer mobile app specialists, swift mobile developer collaborators and figma mobile app handoffs - not only for Android Development and Mobile App Development. 🏁 As a Mobile Developer and Android Developer I communicate clearly, meet predictable timelines and value transparency. I work as android game developer, Android App Developer, mobile app developer in Ukraine - mobile app developer ukraine - and full stack mobile developer, delivering Android Development, Mobile App Development and Mobile Developer support for startups, including android app publisher and android tv app builds. Every android developer kotlin engagement follows the same Android Development and Mobile App Development discipline, and every android app developer milestone gets reviewed against that same Android Development bar. Competitive advantages of my Android Development as a Mobile App Developer: Clear Communication, Committed to Quality, Collaborative. As a Mobile Developer you get faster app performance, lower crash rates and higher retention. 🔑 Stack: Android, android developer kotlin, Android App Developer, Android App Development, Kotlin, Java, Jetpack Compose, Firebase, RESTful APIs, Android SDK, Swift, ios development, Objective-C, Apple Xcode, SwiftUI, react native, JavaScript, React, PHP, Node.js, flutter developer, android developer kotlin, android game developer, full stack developer, ios developer, web developer, mobile application developer, app developer ios android, blockchain development, ai mobile app developer, bubble io certified developer mobile app, Android Development, mobile app design, Mobile Developer, mobile application developer, uxpin, data entry, Android Smartphone. If you need a dependable Android Developer, Android App Developer or Mobile App Developer to lead your next Mobile App Development project as a Mobile Developer, I'm ready - as an android developer kotlin, Mobile Developer and Mobile App Developer who treats every Android Development and Mobile App Development milestone with care, with room for mobile app marketing input along the way, and an android developer kotlin mindset on every release

🟢 AVAILABLE TODAY, 10.07 ⚡ Message me "AUDIT" - get a free 30-min Swift & iOS technical review of your app idea, architecture, or existing Swift codebase. No sales pitch. Just honest Swift engineering feedback. I'm Siarhei - Swift & Kotlin engineer, ex-CTO x 3 funded startups, CEO of Sparkler Soft. We build native iOS (Swift) and Android (Kotlin) products that ship, scale, and raise. 🔵 PROVEN RESULTS ◈ iHairium - AI Hair Diagnostics (Swift, live on App Store) Native Swift + Core ML neural network 100K+ training images, 95-98% accuracy $600K angel round + $5M seed valuation Revenue x10 to x1000 per month in early stages Google & Amazon grants, 1,000+ clinic partners onboarded ◈ Eco-Go - Electric Scooter Sharing Platform Swift (iOS) + Kotlin (Android) + Backend + IoT + Admin Panel AWS IoT Device Management, swappable battery infrastructure Named "Best Startup of the Region" ◈ BLE Wearable App (Swift + Kotlin, App Store + Google Play) HealthKit + Health Connect + RevenueCat subscriptions BLE background sync, AWS IoT Core Shipped on schedule, 5.0 client review ◈ Optics Platform (White-label, Strict NDA) Swift + Kotlin, AI-assisted frame & lens selection via device camera Active in 60+ countries, 1,000+ fitting points worldwide 10+ years on market, award-winning at international exhibitions ◈ Chibbis - Unified Food Delivery Service Swift (iOS) + Kotlin (Android) + Web + Admin Panel + CMS 600+ restaurants, 150+ cities One of the country's leading delivery platforms ◈ CoinForShop - Crypto Marketplace Swift (iOS) + Kotlin (Android) + Web (React) Non-custodial wallets, smart contract payments BTC, ETH, BCH, LTC, XMR, TRX, 100% MVP delivered ◈ Azarium - NFT Real Estate Investment Platform Swift + Kotlin, fractional property ownership via blockchain MAS-regulated, live construction webcam in-app Min investment from $200, expected ROI 30-60% 🟠 WHAT WE BUILD WITH SWIFT AND KOTLIN - Native iOS (Swift, SwiftUI, UIKit, Objective-C) - Native Android (Kotlin, Java) - Swift + Kotlin full product: app + backend + admin panel + CMS - HealthTech and AI - Swift Core ML, on-device neural networks, camera diagnostics - TensorFlow Lite, OpenCV, real-time image analysis in Swift - FinTech and Crypto - Swift + Kotlin wallets, KYC/AML, Stripe, smart contracts, NFT - Mobility and IoT - Swift + Kotlin: GPS, BLE, AWS IoT, scooter and bike sharing - Telematics, real-time fleet management - Marketplace and Delivery - Full-stack Swift + Kotlin: app + backend + admin panel + CMS - API Integrations - Stripe, Mapbox, Sumsub, Firebase, HealthKit, any third-party 🟡 SWIFT AND KOTLIN TECH STACK - Mobile: Swift, SwiftUI, Objective-C, UIKit, Kotlin, Java - Backend: Java Spring Boot, Node.js, NestJS, Golang - Frontend: React, Next.js - AI/ML: TensorFlow Lite, Core ML (Swift), OpenCV - Cloud: AWS, GCP, Azure, Docker, Kubernetes, CI/CD - Data: PostgreSQL, MongoDB, Redis, Elasticsearch - Security: OAuth2, OIDC, JWT, Keycloak, Biometrics, IAP (Swift StoreKit) 👉 Message "AUDIT" right now - 30 minutes to understand if our Swift and Kotlin team is the right fit. No obligation. No pitch. Just clarity.

⚡ Backend systems should not become fragile over time; they must stay maintainable, scalable, and reliable as products grow. I am a Backend Engineer specializing in Java, Kotlin, and Spring Boot, focused on building production-grade systems where clean architecture, long-term maintainability, and stability are critical. I combine strong backend engineering practices with practical system design to create APIs and services that remain easy to extend, debug, and operate in real-world environments. Clients work with me when system quality, clean code, and scalable backend architecture matter, not just feature delivery. 🏆 Proven Engineering Approach ✔ Clean, maintainable backend architecture ✔ Production-focused development mindset ✔ Long-term scalability and reliability focus ✔ Clear communication and structured collaboration 🚀 Core Capabilities ☕ Backend Engineering with Java & Kotlin • Spring Boot application development • REST API design & implementation • Business logic architecture • Secure and maintainable backend systems • Performance-focused backend development 🏗 Scalable System Architecture • Microservice-based architectures • Modular and maintainable code structure • Service communication patterns • Production-ready backend design • Reliability and scalability optimization 🗄 Database & Persistence Engineering • PostgreSQL, MySQL, MongoDB • Hibernate / JPA / Spring Data JPA • Query optimization & data modeling • Relational and NoSQL database design ⚙ Development & DevOps Workflow • Docker-based environments • Git-based development workflows • Unit & integration testing • CI/CD-friendly project structures 🔍 Engineering Focus 🏢 Enterprise & Business Platforms Scalable APIs • backend services • maintainable systems 🚀 Startup Products & SaaS Platforms Fast iteration • clean architecture • long-term scalability 💡 Engineering Mindset • Architecture-first thinking • Clean and understandable code • Simplicity over over-engineering • Production reliability focus • Ownership from development to deployment • Long-term maintainability mindset 🧰 Technical Stack Java • Kotlin Spring Boot • Spring MVC • Spring Data JPA REST APIs • Microservices PostgreSQL • MySQL • MongoDB Hibernate • JPA Docker • Git ✨ Why Clients Choose Me ⭐ Clean and maintainable backend architecture ⭐ Scalable production-ready systems ⭐ Strong Java & Kotlin expertise ⭐ Clear communication & accountability ⭐ Reliable engineering mindset 🚀 Ready to Build Stable, Scalable Backend Systems? If you need a backend engineer who cares about clean architecture, maintainable systems, and production reliability, I am ready to help. Let us build backend systems that stay reliable, scalable, and easy to maintain long after launch.

I have been developing mobile applications from the last 12 years. I have developed several applications and helped many businesses with my solutions. Below are some of my past developed Android and iOS application domains: - Restaurant App - Events - Health & Fitness - Healthcare - On-demand - Service provider - Video/photo editing, - IoT, Bluetooth - Dating/ Social networking and many more I have worked on following technologies: - Objective C/Swift - Java/Kotlin - PayPal/Stripe/Braintree & Other Payment Gateway Integration - Google Maps/Mapbox/MapKit - Social Media SDK's like Facebook, Twitter, Instagram, Google+, Snapchat, etc - Restful/SOAP API's Development - Analytics like Google Analytics, Clevertap, Amplitude, Flurry, etc. - Design Patterns: Test-driven Development (TDD), Model View View Model (MVVM), Model View Controller (MVC), Model View Presenter (MVP) - CI/CD tools: Fastlane, CircleCI CONCEPTS • Good Experience with Agile Development • Object-Oriented-Programming Algorithms, Data Structure, Analytical skills and Problem solving MANAGEMENT Tools • Communication - Slack, Zoom, Hangout and Skype • Project Management - Jira, Trello and Basecamp • Tracking - Clickup

I'm the mobile app developer you're looking for! Why? I build Android and cross-platform products that ship fast, scale cleanly, and create real business value. ABOUT ME • 9+ years and 40+ apps shipped as a mobile app developer across Android, iOS, and cross-platform builds • 25 Total jobs, 100% JSS, Top Rated status, 5-star feedback as a mobile app developer on Upwork • Avg. response time 0-4 hours, ready to start within 24 hours as your mobile app developer • 500K+ downloads across 15+ published apps as an Android developer and iOS developer • 99.9% crash-free sessions, 40% fewer production crashes through Firebase and Sentry monitoring as a full stack mobile app developer • 9+ yrs. Senior Android/Kotlin Engineer, 100% JSS, Top Rated mobile app developer with 5-star feedback across 25 completed jobs • EU/US time-zone overlap, replies within 0-4 hour WHERE I DELIVER • As Android developer kotlin - 20+ native builds, 30% faster release cycles through MVVM, MVI, and Clean Architecture • As iOS developer - 10+ Swift/SwiftUI apps, 25% smoother onboarding through native iOS patterns as an iOS Android developer • As iOS Android developer - 12+ dual-platform products maintained from a single codebase, cutting maintenance cost by 35% • As app developer iOS Android - 8+ cross-platform launches, 4-6 weeks faster time-to-market than building two native teams • As flutter developer and react native specialist - 6+ cross-platform apps, 20% lower dev cost vs. separate native builds • As full stack developer and web developer - 10+ backend APIs and admin dashboards powering every mobile app developer stack end-to-end • As ai mobile app developer - 5+ AI-powered features shipped (voice, vision, LLM), cutting manual workflows by 40% • As Android game developer - 3+ Unity-integrated apps with real-time rendering and physics • As mobile developer and app developer iOS - 15+ App Store and Google Play submissions handled start to finish INDUSTRY IMPACT • GPS & Navigation - 6+ live-tracking map apps, 99.5% location accuracy, powering fleet and delivery use cases as a mobile app developer • Warehouse & Inventory - 4+ barcode-scanning apps built on Zebra SDK, cutting inventory errors by 30% and pick times by 25% as an Android developer • Retail & Hospitality Kiosks - 3+ self-service kiosk apps handling 1,000+ daily transactions each as a mobile app developer • Voice & Speech - 3+ speech-recognition apps with 95%+ transcription accuracy as an ai mobile app developer • Proximity & BLE - 5+ beacon-based apps improving proximity detection accuracy by 25% as an Android developer kotlin specialist • Full Stack Delivery - 10+ end-to-end builds spanning backend, web developer dashboards, and mobile clients as a full stack mobile app developer TYPES OF APPS I'VE BUILT • 15+ GPS-enabled map apps with live location tracking and turn-by-turn navigation as a mobile app developer • 4+ warehouse management apps with barcode scanning and real-time inventory sync as an Android developer kotlin specialist • 3+ kiosk apps for retail, hospitality, and self-service terminals processing 1,000+ transactions daily • 3+ speech-recognition and voice-to-text apps with 95%+ transcription accuracy as an ai mobile app developer • 5+ BLE beacon and proximity-detection apps as an Android developer, plus 3+ Unity-integrated builds as an Android game developer • 6+ cross-platform apps as a flutter developer, and 2+ additional flutter developer rebuilds migrating legacy hybrid apps to native performance • 8+ camera-focused media capture tools and 5+ AI-powered conversational interfaces as an app developer iOS Android HOW I BUILD • 20+ CI/CD pipelines configured, 35% faster build and release cycles as a mobile app developer • Kotlin, Java, Swift, Flutter, React Native - 40+ apps delivered across Android developer, iOS developer, and app developer iOS Android engagements • Jetpack Compose, RxJava, Coroutines, Dagger, Hilt, Koin, MVVM, MVI - core toolkit for every mobile developer and full stack mobile app developer build • Firebase, Android Profiler, Sentry, custom analytics - 99.9% crash-free sessions across 15+ live apps as a mobile app developer • Git, Jenkins, Jira, automated test coverage - structured delivery as a full stack developer and app developer iOS for teams of any size • GPS/Location Services, Google Maps SDK, Speech Recognition, BLE, Unity, Zebra SDK - hardware depth that sets an iOS Android developer apart from a generic app developer Clients keep hiring me as their mobile app developer because the numbers hold up: 9+ years of experience, 25 Total jobs, 100% JSS, Top Rated status, 5-star feedback, and a 0-4 hour response time. Whether you need an Android developer for a native build, an iOS developer for App Store polish, an app developer iOS Android team for a dual-platform launch, or an ai mobile app developer to add intelligent features - I'm ready to contribute from day one. 📩 Let's build something robust, and engineered to last.

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!