Hire the Best Android SDK Specialists

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.

I build mobile apps that scale, retain users, and generate revenue , not just apps that ship. I'm proud to be part of Toptal's Top 3% developer network, and one of the production apps I've worked on has surpassed 5M+ downloads, with hands-on experience in app monetisation, performance optimisation, and Play Store/App Store releases. Active in the developer community, 5,449 reputation and 280+ answers on StackOverflow. With 10+ years building mobile apps across Android, Flutter, iOS, React Native, and KMM, I've helped launch banking apps, healthcare platforms, AI products, video streaming solutions, chat systems, and high-scale applications used by thousands of users. Instead of just writing code, I focus on building products that are scalable, maintainable, and ready for growth. WHAT I BUILD ✓ Android Apps (Kotlin, Java, Jetpack Compose) ✓ Flutter Apps ✓ iOS Apps (Swift, SwiftUI) ✓ React Native Apps ✓ Kotlin Multiplatform (KMP) ✓ AI-Powered Mobile Applications ✓ Chat, Messaging & WebRTC Video Calling ✓ Fintech & Banking Solutions ✓ Healthcare & Telemedicine Apps ✓ OTT & Video Streaming Platforms ✓ SaaS & Enterprise Applications MONETIZATION & DEPLOYMENT ✓ App Monetization Strategy (AdMob, ad revenue optimization) ✓ App Store & Play Store Release Support ✓ CI/CD & Release Management ✓ Performance Optimization for High-Download, High-Retention Apps TECH STACK Kotlin • Jetpack Compose • Flutter • Swift • React Native • KMP • Firebase • GraphQL • REST APIs • Supabase • AWS • Room • SQLDelight • Coroutines • Hilt • MVVM • MVI • Clean Architecture WHAT CLIENTS GET Fast Development Clean, Scalable Architecture Daily Communication Long-Term Support Production-Ready Code App Store & Play Store Release Support Whether you need a new mobile app, a senior engineer to rescue a struggling project, or an expert to scale an existing application, I can help. Let's build something users actually love using.

Need a fast, scalable iOS app built with SwiftUI — or help fixing a messy codebase? I help startups and growing companies build production-ready iOS apps with clean architecture, smooth performance, and App Store–ready polish. Recent results: 🚀 Top 100 Kids Paid app on the App Store 💰 $400K+ earned | 10,500+ hours on Upwork ✅ 200+ successful projects with long-term clients 💡 What I can help you with: SwiftUI & UIKit app development (from MVP to scale) Refactoring and modernizing legacy iOS codebases Subscription systems & In-App Purchases Performance optimization & architecture improvements API integration & scalable backend connectivity App Store submission, compliance & launch support 🎯 Who I work best with: Startups and teams that need a reliable senior iOS developer who thinks beyond code — focusing on scalability, performance, and long-term product quality. If you want clean code, clear communication, and fast execution — let’s talk.

From concept to launch, I build production-grade mobile applications that are scalable, secure, and built to deliver real business results. I’m Hardeep, an experienced Mobile App Developer with over 10 years of hands-on expertise creating high-performance mobile apps for startups and enterprises. I specialize in native iOS and Android development, as well as React Native, with a strong focus on AI-driven features and modern app architectures. Whether you’re launching an MVP or scaling an existing product, I help transform ideas into reliable, user-friendly mobile experiences that perform exceptionally well in real-world conditions. ==> Mobile Development Expertise: ------------------------------------------ I work extensively with iOS (Swift), Android (Kotlin), React Native, and Flutter to build fast, responsive, and maintainable mobile applications tailored to your business goals. ==> AI-Driven Features & Integrations: --------------------------------------------- I integrate AI capabilities such as LLM APIs (GPT, Llama), conversational AI, and predictive models to enhance user engagement, automation, and decision-making within mobile apps. ==> Industry Experience: ------------------------------ I have delivered successful solutions across multiple domains, including FinTech, Healthcare (HIPAA-compliant apps), video streaming, subscription-based platforms, social and dating apps, and real estate solutions. ==> Payments, Streaming & Infrastructure: -------------------------------------------------- My experience includes payment gateway integrations (Stripe, PayPal, Apple Pay, Google Pay), subscription systems, in-app purchases, and real-time video streaming using WebRTC, Twilio, Zoom, and Agora. I also handle CI/CD pipelines, app distribution, and cloud-backed mobile infrastructures. ==> How I Work: ------------------- I follow Agile development practices, prioritize clear communication, and provide regular updates throughout the project lifecycle. My code is clean, scalable, and designed to support long-term growth and future enhancements. If you’re looking for a reliable mobile app developer who understands native and cross-platform development and can seamlessly integrate AI-powered features, I’d be glad to collaborate. Let’s build a high-performing mobile app that users love and businesses trust.

🚀 Looking for a Native Android Developer who can build, improve, or scale your Android app? I'm Inam Ullah Khan, a Native Android Developer with 3+ years of experience building production-ready Android applications. With a 100% Job Success Score and 5-star client feedback, I help startups and businesses transform ideas into fast, scalable, and user-friendly mobile apps. I specialize in AI-powered apps, E-commerce, Healthcare & Fitness, SaaS, and custom business applications using modern Android technologies. Whether you're launching a new product, upgrading an existing app, integrating Firebase, or preparing for Google Play Store release, I focus on delivering clean architecture, excellent performance, and long-term maintainability. 🚀 Core Android Development Services 📱 Native Android App Development 🔹 Native Android Development with Kotlin & Java 🔹 Android SDK, Jetpack Compose & XML UI 🔹 Responsive interfaces for phones and tablets 🔹 MVVM & Clean Architecture 🔹 Material Design 3 🔹 Coroutines, Flow & LiveData 🔹 Custom UI, animations, and smooth user experiences 🔹 Android Studio & Git-based development 🔥 Backend & API Integration 🔹 REST API & GraphQL Integration 🔹 Firebase Authentication 🔹 Firebase Firestore & Realtime Database 🔹 Push Notifications (Firebase Cloud Messaging) 🔹 Google Sign-In & Social Authentication 🔹 Payment Gateway Integration 🔹 Offline data synchronization & caching 🤖 AI Mobile App Development 🔹 OpenAI API Integration 🔹 AI Chatbots & Virtual Assistants 🔹 Prompt Engineering 🔹 AI-powered recommendations and smart features 📍 Maps & Real-Time Features 🔹 Google Maps SDK 🔹 GPS Tracking 🔹 Live Location 🔹 Route Navigation 🔹 Geofencing 💾 Database & Networking 🔹 Room Database 🔹 SQLite 🔹 Firebase Database 🔹 Retrofit & OkHttp 🔹 JSON Parsing 🔹 Secure API Communication ⚡ Performance & Security 🔹 Performance Optimization 🔹 Memory Optimization 🔹 Crash Fixing & Debugging 🔹 Secure Authentication 🔹 Data Encryption 🔹 ProGuard / R8 Code Obfuscation 🔹 Google Play Store Release Optimization 🛠 Tech Stack Languages Kotlin Java Frameworks & Libraries Android SDK Jetpack Compose Android Jetpack Coroutines Flow Hilt Backend & Database Firebase Retrofit OkHttp Room Database SQLite GraphQL Tools Android Studio Git GitHub Postman ⭐ Why Clients Choose Me ✔ 100% Job Success Score ✔ Production-ready Android applications ✔ Clean, scalable, and maintainable code ✔ Fast & transparent communication ✔ Daily progress updates ✔ On-time delivery ✔ Long-term support after launch ✔ Focus on performance, reliability, and user experience 📩 Let's Build Your Android App Whether you need a brand-new Android application, AI integration, Firebase backend, API integration, bug fixing, performance optimization, or Google Play Store deployment, I'm ready to help. Send me a message with your project idea, and I'll provide a clear technical plan to turn it into a high-quality Android application.

Dear Sir/ma'am, I am an expert Mobile app developer and developed 35+ apps having millions of users and downloads. I have developed a wide range of mobile apps. Solana Wallet based app Beacon/Hardware devices based apps Chat app Taxi app Social app Offer & Coupon Based app Restaurant Based App Messenger App Printer Based App Beacon Estimote based app Photo editing app e-Book Reader Based App Using my Experience and Knowledge to provide 100% Guaranteed Service Blended with Quality and Accuracy. Iím an Expert, Honest, Sincere and Responsible Contractor. Looking for the next opportunity to prove my Expertise and to make a Long Term Successful Relation with my Employer.