Senior Android Engineer with 12+ years of experience designing and developing scalable, high-performance mobile applications across FinTech, E-commerce, Digital Payments, Ride-Hailing, Food Ordering, Subscription Platforms, and Mobile SDKs. I specialize in building production-ready Android applications using Kotlin, Java, Jetpack Compose, MVVM, Clean Architecture, Coroutines, Flow, RxJava, Retrofit, OkHttp, Dagger/Hilt, Kotlin Multiplatform, and Firebase. I have extensive experience modernizing legacy Android applications, migrating XML-based UIs to Jetpack Compose, and implementing Server-Driven UI architectures for dynamic feature delivery. My expertise includes: • Native Android application development • Jetpack Compose UI development • Server-Driven UI architecture • Mobile SDK development and integration • REST API integration • Performance optimization and app startup benchmarking • Memory optimization and crash analysis • CI/CD automation using Bitrise, GitHub Actions, and Azure DevOps • Play Store release management • Code reviews, mentoring, and technical leadership I have successfully delivered applications serving users across multiple countries, focusing on stability, scalability, and performance. My work has included improving crash-free sessions to over 99%, reducing CI/CD build times by 50%, optimizing application startup performance using Android Macrobenchmark, and building reusable UI component libraries and design systems. Technical Skills • Languages: Kotlin, Java, Go • UI: Jetpack Compose, XML • Architecture: MVVM, Clean Architecture, Server-Driven UI, Kotlin Multiplatform • Concurrency: Coroutines, Flow, RxJava • Networking: Retrofit, OkHttp • Dependency Injection: Dagger2, Hilt • Testing: JUnit, Espresso, Selenium, Jacoco, SonarQube, Macrobenchmark • DevOps: Bitrise, Azure DevOps, GitHub Actions, Firebase, CI/CD Pipelines • Cloud & Backend: Google Cloud Run, PostgreSQL, REST APIs I help clients build scalable Android applications, modernize legacy codebases, optimize performance, integrate APIs and SDKs, automate CI/CD pipelines, and deliver clean, maintainable, production-ready mobile solutions.

Mobile Tech Lead—Android (Kotlin/Java) | XMPP & Webrtc Expert | Python | KMP | iOS Aware | CI/CD pipelines | Scalable App Development | Android Mobile Engineer | 12+ Years of Experience I have more than 12+ years of experience in mobile app development. I have expertise with native (Java/Kotlin for Android) and have huge experience with cross-platform (Kotlin Multiplatform). I am well versed with Android Fragments and XML layouts as well and have worked on several projects using them. Kotlin Multiplatform (KMP) is an open-source technology that allows developers to reuse Kotlin code across various platforms, including Android, iOS, web, desktop, and server-side, while retaining the benefits of native programming. Google officially supports KMP for sharing business logic between Android and iOS apps. Skills and Expertise: [ ] Extensively using Claude.ai daily for app development and problem-solving—dramatically accelerating build speed, reducing errors, and delivering higher-quality results in a fraction of the traditional development time. [ ] Proven experience managing AI-driven app development using Claude.ai as the primary coding engine, delivering polished, production-ready applications. [ ] Proficient in Java and Kotlin programming languages for Android & iOS (Kotlin Multiplatform) app development. [ ] Extensive experience with Android Studio, SDK tools, and third-party libraries. [ ] Strong understanding of mobile app architecture patterns (MVC, MVP, MVVM). [ ] Expertise in integrating RESTful APIs, handling JSON data, and working with web services. [ ] Familiarity with version control systems like Git for code collaboration and CI/CD for pipelines and auto-build generation. [ ] Knowledge of UI/UX design principles to create visually appealing and intuitive interfaces. Tech Stack: Android:- Programming languages: 1- Kotlin / Java 2- Kotlin Multiplatform for cross-platform app development. Architecture: 1- MVVM Android development tools: 1- Android Studio and Android Developer Tools (ADT) 2- Android SDK & SDK Platform Tools Authentication Methods • Use OAuth 2.0/OpenID Connect for third-party login (Google, Facebook, GitHub) • Implement JWT (JSON Web Tokens) for stateless authentication • Add biometric authentication using Android's BiometricPrompt API • Support traditional email/password with server-side secure hashing Secure Token Storage • Use EncryptedSharedPreferences to store tokens securely • Leverage Android Keystore for hardware-backed encryption • Never store tokens in plain text or regular SharedPreferences • Clear sensitive data from memory after use Session Management • Store access tokens (short-lived: 15-60 minutes) and refresh tokens (long-lived) • Implement automatic token refresh before expiration • Use OkHttp interceptors to attach tokens to API requests automatically • Handle token expiration gracefully with retry logic • Clear all tokens on logout • Maintain session state across app restarts Network Security • Enforce HTTPS for all API communication • Implement SSL certificate pinning to prevent MITM attacks • Configure Network Security Config in AndroidManifest • Validate server certificates properly UI Frameworks: 1- Jetpack Compose 2- Android UI components Crash/product analytics: 1- Firebase Crashlytics. 2- Firebase Performance. Payment Integrations: 1- RevenueCat 2- Google In-app purchases/subscriptions 3- Stripe 4- Razorpay 5- Any other payment gateway. Chats & Calls with E2E Encryption: 1- XMPP & WebRTC. 2- Jitsi for Conference. 3- LiveKit for Conferences. Proposed Approach: I suggest following the Agile development methodology, dividing the project into several iterations with regular feedback sessions. This will ensure transparency, effective communication, and timely delivery of milestones. I will provide regular updates on the progress, seeking your input to make necessary adjustments along the way. Deliverables: [ ] Complete development of the Android application, meeting all specified requirements. [ ] Rigorous testing to ensure the app functions flawlessly and delivers an exceptional user experience. [ ] Documentation, including user guides, API references, and any additional instructions as required. [ ] Assistance with deploying the application to the Google Play Store, if needed.

I'm a Senior Mobile Developer with 10+ years of experience building high-quality iOS and Android apps, both native and cross-platform. I help businesses and startups turn their ideas into fast, reliable, and user-friendly mobile applications. Whether you're starting from scratch or need someone to fix bugs, improve performance, or maintain an existing app — I'm here to help. ✅ My core strengths: React Native & Flutter – Cross-platform apps that run smoothly on both iOS and Android. Swift & Objective-C – Native iOS development with deep platform knowledge. Kotlin & Java – Robust native Android applications. Bug fixing & troubleshooting – Quickly identify and resolve issues in existing codebases. Performance optimization – Make your app faster, lighter, and smoother. I focus on writing clean, maintainable code and delivering solutions that work — not just on day one, but long term. If you're looking for a reliable mobile developer to help you build or improve your app, let’s talk!

🚀 𝐓𝐡𝐞 𝐀𝐩𝐩 𝐒𝐭𝐨𝐫𝐞 𝐢𝐬 𝐜𝐫𝐨𝐰𝐝𝐞𝐝, 𝐚𝐧𝐝 𝐚𝐯𝐞𝐫𝐚𝐠𝐞 𝐝𝐞𝐬𝐢𝐠𝐧 𝐣𝐮𝐬𝐭 𝐝𝐨𝐞𝐬𝐧’𝐭 𝐜𝐮𝐭 𝐢𝐭 𝐚𝐧𝐲𝐦𝐨𝐫𝐞. Whether it’s a mobile app, a macOS desktop tool, or a UI that converts users demand performance, beauty, and seamless experience. That’s where I come in. I'm a 𝐌𝐨𝐛𝐢𝐥𝐞 & 𝐦𝐚𝐜𝐎𝐒 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 + 𝐔𝐈/𝐔𝐗 𝐃𝐞𝐬𝐢𝐠𝐧𝐞𝐫 with a proven record of building high-performance apps and clean, conversion-driven designs. I specialize in delivering Swift-powered solutions that combine sleek front-ends with rock-solid back-end logic. 🔧 𝐖𝐡𝐚𝐭 𝐈 𝐎𝐟𝐟𝐞𝐫: ✔ iOS Development (Swift, SwiftUI, Combine, CoreData) ✔ macOS Desktop App Development using native frameworks & APIs ✔ MVVM Architecture for scalable, clean codebases ✔ Firebase Integration (Realtime DB, Auth, Cloud Messaging, Firestore) ✔ Custom PDF Workflows with PDFKit ✔ Smooth Lottie Animations for next-level UI ✔ API Integration + JSON Serialization with precision ✔ UI/UX Design in Figma – From wireframe to final screen ✔ Responsive Design for all screen sizes (Mobile + Desktop) ✔ Landing Pages & Web UI that convert visitors into users 💡 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐇𝐢𝐫𝐞 𝐌𝐞: ✔ 6+ years of experience across mobile, desktop & UI design ✔ Cross-disciplinary skills I don’t just code, I design with purpose ✔ Clean, modular code that’s easy to scale and maintain ✔ Great communication, deadline-oriented, and focused on ROI ✔ Solutions built around real user behavior not just trends 🏆 𝐑𝐞𝐜𝐞𝐧𝐭 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬: 🔗 𝐏𝐨𝐫𝐭𝐟𝐨𝐥𝐢𝐨 𝟏 – 𝐒𝐰𝐢𝐟𝐭𝐔𝐈 + 𝐏𝐃𝐅𝐊𝐢𝐭 𝐀𝐩𝐩 𝐰𝐢𝐭𝐡 𝐅𝐢𝐫𝐞𝐛𝐚𝐬𝐞 𝐒𝐲𝐧𝐜 Developed a cross-platform app (iOS + macOS) using SwiftUI and PDFKit, integrated with Firebase for real-time data sync and custom PDF export workflows. 🔗 𝐏𝐨𝐫𝐭𝐟𝐨𝐥𝐢𝐨 𝟐 – 𝐦𝐚𝐜𝐎𝐒 𝐃𝐞𝐬𝐤𝐭𝐨𝐩 𝐀𝐩𝐩 𝐰𝐢𝐭𝐡 𝐂𝐨𝐫𝐞𝐃𝐚𝐭𝐚 + 𝐂𝐨𝐦𝐛𝐢𝐧𝐞 Delivered a clean, MVVM-structured desktop app using CoreData and Combine for smooth UI updates and persistent storage. 🔗 𝐏𝐨𝐫𝐭𝐟𝐨𝐥𝐢𝐨 𝟑 – 𝐀𝐏𝐈-𝐏𝐨𝐰𝐞𝐫𝐞𝐝 𝐀𝐩𝐩 𝐰𝐢𝐭𝐡 𝐋𝐨𝐭𝐭𝐢𝐞 𝐀𝐧𝐢𝐦𝐚𝐭𝐢𝐨𝐧𝐬 Built a visually rich app featuring Lottie animations and seamless third-party API integration for enhanced interactivity. 🔗 𝐏𝐨𝐫𝐭𝐟𝐨𝐥𝐢𝐨 𝟒 – 𝐑𝐞𝐬𝐩𝐨𝐧𝐬𝐢𝐯𝐞 𝐒𝐡𝐨𝐩𝐩𝐢𝐧𝐠 𝐀𝐩𝐩 𝐔𝐈 𝐢𝐧 𝐅𝐢𝐠𝐦𝐚 Designed a mobile shopping app UI in Figma with responsive layouts, optimized for usability across iPhone and iPad screens. You can explore these live projects in my portfolio for real examples of my code, design, and delivery standards. 👥 𝐖𝐡𝐨 𝐈 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡: Startups & Entrepreneurs launching new mobile or macOS apps Agencies who need reliable developers/designers for client work Businesses looking to redesign or optimize mobile/Desktop UI/UX Tech teams who need clean architecture, API handling, and modern Swift coding 🎯 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤 & 𝐓𝐨𝐨𝐥𝐬: Languages/Frameworks: Swift, SwiftUI, Combine, Firebase, MVVM, CoreData Design: Figma, Lottie, Responsive Design Tools: PDFKit, REST APIs, JSON serialization, Git You’ve got a product that deserves to perform and look outstanding let’s make sure your users love every tap, swipe, and click. Click “Invite” and let’s build something that scales, converts, and stands out.

Kotlin • Java • Flutter • Android SDK • Jetpack Compose • Android Enterprise • Android Management API • MDM • Kiosk Mode • Device Owner • COSU • Firebase • Retrofit • Room Database • WorkManager • REST APIs • Google Maps • WebSockets Senior Android & Flutter Developer with strong knowledge of Android OS, specializing in Mobile Device Management (MDM), Kiosk Applications, Android Enterprise, and cross-platform mobile app development. I help businesses build secure, scalable, and enterprise-grade Android and Flutter applications for dedicated devices, fleet management, field operations, digital signage, POS systems, and remote device management. Core Expertise ✅ Native Android Development (Kotlin & Java) ✅ Cross-Platform Development (Flutter) ✅ Mobile Device Management (MDM) Solutions ✅ Kiosk Mode Applications (Single-App & Multi-App) ✅ Android Enterprise & Android Management API ✅ Device Owner (DO) & Corporate-Owned Dedicated Devices (COSU) ✅ Zero-Touch Enrollment & QR Provisioning ✅ Android OS, Framework & System-Level Development ✅ Remote Device Monitoring & Management ✅ Device Policy Enforcement & Security Controls ✅ GPS Tracking & Location-Based Applications ✅ Background Services, WorkManager & Broadcast Receivers ✅ Firebase, REST APIs & Real-Time Communication ✅ Android Tablets, Rugged Devices, POS Terminals & Android TV ✅ Performance Optimization & App Store Deployment I have experience building Android and Flutter applications that enable organizations to remotely manage devices, lock devices into kiosk mode, enforce security policies, monitor device health, track assets, automate workflows, and streamline enterprise operations. Whether you need a custom Android application, Flutter mobile app, MDM platform, kiosk solution, Android Enterprise integration, or device management automation, I can deliver secure, reliable, and production-ready solutions. #AndroidDeveloper #FlutterDeveloper #MobileAppDeveloper #AndroidOS #Kotlin #Java #Flutter #Dart #AndroidSDK #JetpackCompose #AndroidAppDevelopment #NativeAndroid #CrossPlatformDevelopment #MDM #MobileDeviceManagement #KioskMode #KioskApp #AndroidEnterprise #AndroidManagementAPI #DeviceOwner #COSU #ZeroTouchEnrollment #EnterpriseMobility #GPSTracking #Firebase #RESTAPI #GoogleMaps #POSSystems #RemoteDeviceManagement #AppDevelopment

I'm Hugo. I'm a professional Android developer with 10 years of experience in mobile development. I am self-motivated, enthusiastic, teamwork, and active. I have strong problem-solving skills and a keen attention to detail. I am proficient in both Java and Kotlin programming languages. I am keen on animation and user experiences to make clients win. Excellent communication skills and fast learner, eager to learn more. Skills: - I have extensive experience with Android SDK, Android Studio, and related development tools. - I have strong proficiency experience with GIT version control systems. - I am expertise in developing and implementing background tasks and services in Android (BroadcastReceiver, Services, AlarmManager, WorkManager, and JobScheduler). - Strong TDD & BDD with Android development. - Strong OOP (Object Oriented Programming). - Strong Design Pattern: Adapter, Singleton, Facade, Abstract, Builder, Observer, ChainOfResposivebility, MVC, MVP, MVVM, MVI. - Using the latest technologies: Kotlin, Jetpack Compose, Hilt, Dagger 2, RxAndroid, Data binding, View binding, Rest Full APIs, Realm, Retrofit, Coroutines, Material Design - Jenkins/Fastlane CI/CD for Android. - Experienced in R&D for POS devices, Panasonic Devices, CATIA v5, Fusion 360, MapBox, Autodesk, and BLE for Ring devices. -Be able to work on other related languages: Swift, Flutter, React Native, NodeJs (NestJs), Python, Firebase, AWS (AppStream 2.0, S3, EC2), CI/CD (Jenkins, GitlabCI). iOS skills: - I have 4+ years of iOS app development. - I am proficient in Swift programming. - Technologies used: Swift, Storyboard, UIKit, CoreData, User Preference, SwiftUI, Realm, File Storage, MVVM, VIPER, RxSwift, Profiles, Custom UI, CocaPod, Alarmofile EXPERTISE KEY Kotlin Java Swift Flutter Python NestJs R&D CI/CD UI/UX Teamwork Project Management

I'm a solo Dev. I have more than 9 years of experience in Mobile development and web development. I have been working with the cross-platform framework React Native for 6 years and am still working. This is my main stack right now. I use TypeScript and JavaScript to make React Native apps. I tried the Flutter framework back in 2020, and I like it. I now use Flutter to develop cross-platform applications, and I like it more and more. I feel that I will soon switch completely to Flutter only! Flutter is less of a headache :) Back in 2012, I started my career as a front-end web developer with JavaScript. Since 2015, I started developing for Android applications, and after a year of work, I bought myself the first MacBook to make native applications for iOS. Do you remember Objective-C? I do)) I'm interested in long-term customer relationships, so I am ready to participate in your project from idea to production and provide high-level support after delivering the main work. - I have been using FlutterFlow as well since 2023, and I like it. So I can help you with FlutterFlow if you need it - I like web3 and already have experiance with cryptocurrency token launch and blockchain development Below is my humble list of tools I have experience with or enjoy working with: - React Native - TypeScript - Flutter - Dart - Swift - Kotlin - FlutterFlow - I can make a Native Swift/Kotlin component for React Native or Flutter - GitHub Actions I have used for CI/CD This is an easy way to automate tests and app delivery - Fastlane for CI/CD is the easiest way to automate tests and app delivery - Node.js - React.js - Redux - GraphQL - FastLane/circleci - RevenueCat - Firebase Cloud Firestore - Firebase Realtime Database - Firebase Remote Config - Firebase Cloud Functions - Firebase Authentication - FirebaseCloud Messaging - Firebase Hosting - Firebase Cloud Storage - Firebase Machine Learning - Firebase Dynamic Links I usually write autotests for code. I use these tools: - Jest - Mocha - Jasmine +++++Web3 development:++++++ - blockchain development - Crypto Wallet integrations - MetaMask integration - Alphawallet integration - Experience with coding competitions, e.g. ACM ICPC or Topcoder - cryptocurrency token launch - Casino Game development (including spinner, coinflip, lottery, splash, etc.) - I have already had experience in ChatGPT integration and other AI integrations. Other: - branch.io - ChatGpt integration - OpenAI - Sentry - Tokenscript - Heroku - AWS - DigitalOcean - DApps - retool - internal software development - DeFi projects - LayerZero Im not a Full-stack dev, but I have some experience with Python, Node.js and the Django framework!!!

If you need a reliable mobile developer who can launch your MVP fast and build it so it doesn't break when you scale, I can help. I work with startups and founders to build high-performance iOS and Android apps (using Flutter and native Kotlin)—backed by robust APIs or Firebase backends. My focus is on getting you to market fast without building up technical debt that forces a rewrite later. Instead of overcomplicating your product, I focus on: • Speed to Market: Launching a polished product to validate your ideas. • Scalable Architecture: Clean codebase foundations that your future in-house team can easily inherit. • Direct Founder Collaboration: Acting as a technical partner to help make product decisions, not just write code.

"I build Android apps that don’t just work—they scale." Most developers can build an app for 1,000 users. I specialize in architecting Native Android ecosystems designed for 10 to 15 Million users. With 3.5+ years of experience and a current role as a Senior Android Developer at SoftAxes Technology, I bring enterprise-level stability and high-velocity engineering to every project. 🚀 Velocity & Results I prioritize efficiency without compromising code quality. At my current firm, I recently delivered a production-ready System Utility app with 13 core features in just 6 working days. I achieve this speed by using modern architectures like MVI (Model-View-Intent) and strict Clean Architecture, ensuring that logic is decoupled, testable, and ready for rapid growth. 🤖 AI & The Modern Stack I stay ahead of the curve by integrating Generative AI (Gemini/OpenAI) into mobile solutions to create "smart" features that drive user retention. My technical foundation is built on: Languages: 100% Idiomatic Kotlin & Java. UI: Jetpack Compose, Material Design 3, and custom animations. Architecture: MVI, MVVM, Clean Architecture, and Modular Design. DI & Local Data: Dagger-Hilt, Koin, Room Database, and SQLCipher. Networking: Retrofit, OkHttp, and WebSockets for real-time data. Background Ops: WorkManager and Foreground Services for high-reliability background tasks. 🏆 Why Work With Me? I maintain a 100% Job Success Score because I treat every project as a business partnership. My experience collaborating with global firms like Ikame Global and Appvestor has taught me that the most expensive mistake a startup can make is "cheap code" that has to be rebuilt. I build it right the first time. My Expertise Covers: High-scale Marketplaces (C2C, B2B, Escrow logic) Fintech & Payment Gateways (Safepay, JazzCash, EasyPaisa, Stripe) System Utilities & Phone Cleaners Real-time Navigation & GPS Tracking Content Delivery & Media Apps (4K Wallpapers, AI Content) If you are looking for an Android Architect who understands the difference between an MVP and a Scalable Product, let’s connect. I’m happy to discuss a technical roadmap for your vision.

The experience of working with Artem has been wonderful. Our team has benefited greatly from his constant devotion, technological proficiency, and commitment to quality. He constantly produces organised and effective code, which has been crucial to the accomplishment of our Android projects. Artem is a trustworthy team member, a real professional, and a fantastic communicator. We are really happy to collaborate with him — New Age Media ©️ Do you want to transform your Android app dreams into reality? 🚀 Have a solid, maintainable, bug-free application using the latest technology stack? 📱 Let's talk about how we can provide you with top-notch development services to ensure that your vision is realised and satisfies your needs ✨ I am an Android Developer with 5 years of diverse experience and bachelor's degree in software engineering. I've worked on applications with hundreds of thousands of users and in various areas such as driver's exams, streaming services, healthy eating, and even stores 👨🏻‍💻 When you work with me, you'll get: high code quality, absence of bugs, meeting criteria, and deadlines. These are my constant pillars 💯 Who do I work with? 👨🏻‍💼👩🏾‍💼 • Individual customers • Small teams • Startups • Enterprise companies • Other developers who need help or consulting How can I help you? 🤔 • Build an application from scratch • Implement new functionality into an existing application • Integrate third-party APIs and services • Troubleshoot and debug application problems • Boost the effectiveness and efficiency of the app • Update the app's design and user interface for a better user experience • Ensure that the app works with different Android versions and devices • Work together with designers, product managers, and other team members to ensure project success • Perform code reviews and offer feedback for improvement [TECHNOLOGY STACK] Kotlin/Java, Jetpack Compose, Dagger/Hilt/Koin, Coroutines, Retrofit, Room, Firebase, Glide, Navigation Component, Work Manager, Paging, Data Store, JUnit 4/5, Espresso 🛠️ Send me a message with the specifics of your next project if you'd want to get started on it! 💬