I build Android apps that ship and scale — from banking apps serving millions to my own SaaS with paying customers. What I bring to your project: → 10+ years of native Android development (Kotlin, Jetpack Compose, Clean Architecture) → Founded FitCore, a live multi-tenant SaaS for personal training businesses — 4 apps + admin dashboard, Supabase backend, Stripe billing → Led development of BCP, Pichincha, and Claro mobile banking apps at NTT DATA (millions of users) → Built a 5-app ecosystem for a food delivery business: 500+ MAU, 85% retention, zero downtime → Promoted to Lead Android Engineer, managed teams of up to 9 Core stack: Kotlin, Java, Jetpack Compose, Coroutines/Flow, MVVM, Clean Architecture, Firebase, Supabase, Stripe, Node.js I use AI tooling (Claude Code) to ship faster without cutting corners. I own what I build — from architecture to deployment. Best for: Android apps, mobile SaaS products, fintech/banking apps, multi-app ecosystems, Java → Kotlin migrations, MVP development.

🌟🌟🌟 TOP RATED 🌟🌟🌟 📌 Flutter • Android • iOS • Cross-Platform • Game & Fintech • Senior Software Engineer with 8+ years of experience in Mobile & Web development • Flutter specialist with strong focus on production apps, performance, and clean architecture • Hands-on experience with Android (Kotlin) and iOS (Swift), both native and cross-platform • Proven Technical Lead / Team Lead experience (4–6 members) • Built and scaled apps in Fintech, Blockchain Wallets, Medical, Social, and Gaming domains • Strong background in architecture design, performance optimization, and CI/CD pipelines • Game development experience (Unity, Cocos2d-x) — great for animations and interactive UI • Product-driven mindset with solid communication and ownership • Fast learner, adaptable, and reliable for long-term projects Skills: Flutter (Proficient, 9/10), Java/Kotlin (Proficient, 9/10), Swift (Proficient, 9/10), Objective-C (Proficient, 9/10), API with PHP (Knowledgeable, 7/10), Angular JS (Knowledgeable, 8/10), Node JS (Knowledgeable, 7/10), Nuxt.js / Next.js (Proficient, 8/10), Unity / Cocos2d-x (Knowledgeable, 7.5/10), IDEs: Eclipse (Proficient, 9/10), Android Studio (Proficient, 9/10), Sketch (Knowledgeable, 7/10), Photoshop (Knowledgeable, 7/10), XD (Knowledgeable, 7/10), Notepad++ (Proficient, 9/10) Tools: SVN (Knowledgeable, 7/10), Jira (Knowledgeable, 7/10), Trello (Proficient, 8/10), GIT (Proficient, 8/10), Bitbucket (Proficient, 8/10), Gitlab (Proficient, 8/10)

Dedicated Mobile Software Engineer with a strong background in mobile application development and a focus on delivering efficient, user-friendly, and maintainable solutions. Experienced in working with modern Android frameworks, following best practices, and contributing to all stages of the software development lifecycle. My work covers: • Developing new features and improving existing functionality • Writing unit tests to ensure code reliability • Setting up CI/CD pipelines for automated testing, validation, and build distribution • Conducting code reviews and collaborating closely with stakeholders to refine requirements and deliver solutions that meet business goals Tech stack • Android: Kotlin, Jetpack Compose & XML, Coroutines, Hilt/Dagger 2, multi-module architecture • iOS: Swift, SwiftUI & UIKit • CI/CD: GitHub Actions, Fastlane • Additional tools: Firebase, REST APIs, third-party SDK integrations I thrive in small to mid-sized cross-functional teams that include product managers, QA engineers, developers, and designers. My goal is to keep growing in app architecture, testing, and scalable mobile solutions, while contributing to impactful and long-term projects.

I'm a developer with experience in building Android App for small and medium sized businesses. I'm experience in Android Kotlin and Java Framework. I'm a responsible person at work and always finished with the best quality. Experienced Jetpack Compose Developer, proficient in creating dynamic, interactive, and modern Android UIs. Skilled in leveraging Jetpack Compose's power to build visually stunning and responsive applications. Programming Languages 🟠 Kotlin 🟠 Java Android Jetpack Components 🟠 Room 🟠 LiveData 🟠 Dagger-Hilt 🟠 View Binding 🟠 Data Binding 🟠 Data Store 🟠 Navigation Component 🟠 Coroutines Google services 🟠 Firestore Databese 🟠 Firebase realtime database 🟠 Cloud Storage 🟠 Cloud Messaging 🟠 Google AdMob 🟠 Google Map Entegration Web service connection 🟠 Retrofit 🟠 HttpURLConnection 🟠 Jsoup

🏆 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.

What I Offer - Custom Mobile App Development for Android (Kotlin/Java), Flutter, and iOS (SwiftUI) - Clean Architecture & Scalable Codebases using MVVM, MVI, MVP, or Clean Architecture - Smooth API Integration with Retrofit, OkHttp, Ktor, and Firebase - Modern UI/UX Implementation using Jetpack Compose or traditional XML, based on designs from Figma or Sketch - App Optimization for performance, battery usage, and responsiveness - Agile Collaboration using tools like GitHub, Jira, ClickUp, Trello, and Slack Why Choose Me? - Proven Experience: 8+ years in Android native dev, including Kotlin, and Flutter for cross-platform. - Problem Solver: I don’t just write code — I solve problems and think about your product holistically. - On-Time & Within Budget: I respect deadlines and deliver quality without surprises. - Strong Communicator: Transparent, proactive, and always keeping you in the loop. - Client Satisfaction: Committed to long-term success and happy to support your app post-launch. Let’s Build Something Awesome Got an idea? Need help improving your existing app? Let’s collaborate and bring your mobile product to life. Click the “Invite” button or send me a message — I’m ready to get started!

Native Android Developer | Kotlin, Jetpack Compose & Flutter 🚀 Modern App Development 💬 Fast Communication & Reliable Delivery Hello! My name is Akhmad, and I am a Mobile Developer with 3 years of hands-on experience. I build fast, stable, and user-friendly Android apps for businesses. I specialize in Flutter, Kotlin + Jetpack Compose with clean, scalable architecture and smooth performance. ✔ Technical Skills Android: Jetpack Compose, Kotlin, MVVM, Clean Architecture Core Tools: Coroutines, Flows, LiveData, Room, Retrofit, Coil Flutter: GetX, Bloc/Cubit, Animations, Streams Backend & APIs: REST APIs, JWT Auth, WebSockets, Payments, Offline Mode Full-Stack Option: FastAPI + PostgreSQL development 🚀 Why Choose Me? Modern Android development using Jetpack Compose Clean, maintainable, and scalable code (MVVM + Clean Architecture) Experience building real-time features and complex API integrations Detail-oriented, fast delivery, and clear communication

"I can unreservedly recommend Hussein for the development and support of Android apps. Over the last 2 years, Hussein has delivered amazing work, providing everything we need for Android, Android Auto, and Android Automotive. I have been impressed with how quickly he has supported complex challenges including Mapbox integration, Android Automotive, cloud-based comms, SignalR, and MQTT. 100% recommended." - Client, UK Transport Authority I'm an Android engineer with 4+ years across product companies and freelance work. My specialty is apps that talk to hardware (BLE devices, car head units, sensors), but my day job is production Android at scale, so you get both. 🛠️ WHAT I'VE ACTUALLY SHIPPED 🛒 E-commerce (current role at a software studio): - Cut checkout loading from 12-15s to 2-4s (83% faster) by reworking GraphQL queries, caching, and business logic - Led full migration from XML to Jetpack Compose with MVI, reviewing code and supervising the team - Integrated Payfort and Paymob payment gateways, built Loyalty and Gift Card systems with animated Compose Canvas UI 🚗 Android Automotive & Auto (2 years, UK Transport Authority, UK): - In-vehicle warning app running on a Polestar head unit, tested at Warwick University, covered in industry press (LCRIG) - Road safety and city safety apps: Mapbox, Google Maps, real-time location, MQTT, SignalR - Trained a TensorFlow Lite model with CameraX detecting vehicles for driver safety scoring 📡 BLE & Embedded (my own product, end to end): - Designed a BLE wearable from zero: custom 4-layer PCB (nRF52840, PMIC, capacitive touch), Zephyr firmware with OTA firmware updates over BLE, a Compose Multiplatform (KMP) companion app, and a Ktor backend behind it. I debug every layer: sensor, firmware, app, and server. 🔒 Security & hardened apps: - Built a 7-layer protection system for a client app: Talsec RASP, custom C++ native module for Frida detection, hardware-backed AES-256 with Android Keystore, SQLCipher, ProGuard/R8, string encryption, certificate pinning - Secure chat app: message and file encryption, voice recording, CameraX capture, root detection, USB debugging prevention. Cut its CPU usage by 30% and memory by 80% through profiling - System-level call/SMS handling with CallScreeningService inside Android's 5-second response window ☁️ Backend & self-hosted: - Ktor REST APIs with MySQL, Exposed, and Docker, sharing a Kotlin module between server and app for type-safe contracts - Device telemetry (GPS with 5-tier fallback, signal strength, battery), OTA APK updates, FCM remote commands and Remote Config - I run my own self-hosted infrastructure (Docker, Linux, reverse proxies, monitoring), so I'm comfortable deploying and maintaining what I build 📱 MY OWN PRODUCT - GPA Manager on Google Play: 16K+ downloads across 80+ universities, live Firebase backend Plus 20 completed Upwork contracts: in-app purchases and subscriptions, survivable background services, GPS tracking, offline data capture, SDK migrations. 🤝 HOW I WORK GitHub access from day one so the code is yours at every step. Honest estimates before we start, clear updates while we work, and two weeks of free support after delivery. I usually reply within a few hours. If you're building something with a device, a car screen, or just need an Android app done properly, message me. The first consultation is free: tell me about your project and I'll give you my honest take on the approach, effort, and risks before you spend anything.

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’m a highly adaptable and collaborative Mobile Developer with 4+ years of professional experience building high-quality, production-ready mobile applications. My main focus is mobile app development, creating reliable, user-friendly, and scalable applications with strong performance and clean architecture. I have extensive experience developing native Android applications using Kotlin, Java, and Jetpack Compose, and I also work with Flutter and React Native to build and contribute to mobile applications across multiple platforms when needed. I’m experienced with project management and collaboration tools such as Trello, Notion, Jira, Asana, and ClickUp, helping maintain clear communication, organized workflows, and efficient delivery throughout the development process. My priority is delivering high-quality mobile solutions and building long-term client relationships through professionalism, transparency, and strong technical execution. 🚀 ✅ What You Can Expect: - High-quality mobile app development - Clean, scalable, and maintainable code - Responsive UI and smooth performance - Clear communication and regular updates - On-time delivery and transparent workflow - Long-term support and reliable collaboration 🛠️ Skills & Technologies: 📱 Mobile Development - Android (Kotlin, Java) - Jetpack Compose - Android SDK - XML Layouts & Views - Flutter - Dart - React Native - JavaScript (JS / TS / JSX) 🏗️ Architecture & Best Practices - MVVM / MVI / MVP / MVC - Clean Architecture - OOP - SOLID Principles - Design Patterns ⚙️ Tools & Technologies - Koin / Hilt / Dagger - Gradle - Kotlin Coroutines - Flow - RxJava - LiveData 🗄️ Data & Backend - Room Database - SQLite - Hive - Firebase - Supabase - REST APIs - JSON Parsing - Google Play Console 🧪 Testing & Collaboration - Unit Testing - UI Testing - Debugging & Performance Optimization - Git / GitHub / GitLab / Bitbucket - Trello / Jira / Notion / Asana / ClickUp I focus on building mobile apps that are reliable, scalable, and provide a great user experience while keeping the development process smooth and efficient for every client.