Hire the Best Kotlin Developers
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Mobile engineer for Android (Kotlin/Jetpack Compose) and iOS (Swift/SwiftUI/KMM). I build robust apps that connect to real hardware - USB/OTG, RFID/NFC, BLE, Wi-Fi, GPS/GNSS (NMEA) including Arduino/ESP32 bridges and hybrid stacks with WebView/Capacitor. I focus on clean architecture, measurable outcomes, and fast iteration with strong logging and profiling. I can help you with: Android - Kotlin, Jetpack Compose (Material 3, Navigation), MVVM/Clean, Coroutines/Flow, Hilt, Room, DataStore, WorkManager. iOS - Swift/SwiftUI, Combine, background modes, KMM for shared business logic. Connectivity & hardware - USB serial (CDC/ACM), RFID/NFC, BLE (GATT), Wi-Fi, TCP/UDP/HTTP, MQTT, GPS/GNSS (NMEA), Arduino/ESP32 integration, hot-plug & permissions, stable background workers. Media & data - capture/convert, multipart uploads, resilient retries, offline modes, structured logs & metrics. Hybrid - WebView-native bridges, Capacitor plugins; clean JS APIs, caching, and error handling. Release & quality - Crash/ANR reduction, memory and startup profiling. Process: requirements - technical plan - iterative delivery (weekly sprints) - QA - release. Communication: concise updates, early risk flags, demo build each milestone. Let’s discuss scope - I’ll propose a lean plan and milestones. _____ Говорю по-русски. Беру задачи по Android/iOS, интеграции оборудования (Arduino/ESP32, USB/OTG, RFID/NFC, BLE, Wi-Fi, GPS/GNSS), исправлению ошибок и проблем стабильности. Работаю итеративно, с отчётами и демо-сборками на каждом этапе.

Stop looking for just a coder. Hire a mobile product partner who can turn complex ideas into polished, scalable mobile apps. 🚀 Building a mobile app is an investment. You need someone who understands product decisions, deadlines, business logic, platform guidelines, AI workflows, backend architecture, and long-term maintainability — not just someone who writes code. I specialize in building native iOS apps with Swift, SwiftUI, UIKit, clean architecture, AI integrations, and production-ready backend connections. My strongest focus is iOS, but I also build cross-platform apps with Flutter and can support React Native projects when speed-to-market and shared codebases are the right business choice. Whether you need an AI-powered productivity tool, a subscription-based consumer app, a fintech dashboard, a marketplace, a chatbot, an internal automation system, or a complex real-time mobile platform, I help turn difficult requirements into smooth, reliable, production-ready products. ✅ Why clients trust me • Top Rated on Upwork with 100% Job Success • $20K+ earned and 20+ completed projects • 20+ apps developed, including 10+ live on the App Store • Strong product mindset: I build what matters, not just what is written in a task list • Clear communication, fast iteration, and no disappearing mid-project • App Store-ready quality: privacy, edge cases, review risks, subscriptions, and release flow handled properly • Clean, scalable architecture so your app does not collapse after version one 🛠️ What I can help you build: 📱 Native iOS apps Swift, SwiftUI, UIKit, MVVM, async/await, Combine, StoreKit, widgets, App Intents, Live Activities, push notifications, and App Store delivery. 💙 Cross-platform mobile apps Flutter apps for iOS and Android, plus React Native support for existing apps, MVPs, and startup products that need faster multi-platform delivery. 🤖 AI-powered apps OpenAI, Claude, Gemini, AI chat, AI agents, structured outputs, image analysis, OCR, voice AI, speech-to-text, text-to-speech, smart workflows, and AI copilots inside mobile or web products. ⚙️ AI automations and business tools AI business agents, internal dashboards, CRM-style workflows, document automation, reporting tools, notification systems, admin panels, and API-based process automation. 🎨 High-quality UI implementation Pixel-perfect Figma to mobile implementation with smooth animations, haptics, dark mode, responsive layouts, onboarding flows, paywalls, and polished product details. 🌐 Backend and integrations Firebase, Supabase, authentication, databases, storage, real-time features, REST APIs, serverless functions, admin dashboards, payments, and third-party integrations. 💳 Payments and subscriptions RevenueCat, StoreKit 2, Stripe, in-app purchases, entitlement logic, restore purchases, Apple review compliance, and subscription lifecycle flows. 🚀 Launch, QA, and production support Performance optimization, crash fixing, refactoring, TestFlight builds, App Store submission, Google Play support, bug fixing, analytics, and release readiness. My technical stack includes Swift, SwiftUI, UIKit, Flutter, Dart, React Native, Firebase, Supabase, REST APIs, OpenAI API, Claude, Gemini, StoreKit, RevenueCat, Stripe, APNs, FCM, Git, TestFlight, App Store Connect, and Google Play Console. I handle the full product cycle: planning, architecture, UI implementation, backend integration, AI features, testing, release, and post-launch improvements. If you need a reliable mobile engineer who can think like a product partner and ship like a senior developer, invite me to your job and let’s discuss your app.

Android Developer with 4+ years of experience building scalable mobile applications using Kotlin, Jetpack Compose, and modern Android architectures. I specialize in native Android development and Kotlin Multiplatform (KMP) solutions. What I bring to your project: - Native Android apps with Jetpack Compose, clean modular architecture, and offline-first patterns - Kotlin Multiplatform (KMP) development — shared business logic across Android & iOS using Ktor, SQLDelight, and Compose Multiplatform - Real-time features with WebSockets, GraphQL (Apollo Kotlin), and push notifications - CI/CD pipelines with GitHub Actions for automated builds and releases - Firebase integration (Crashlytics, Performance Monitoring) for production stability Recent highlights: - Led migration of a ride-hailing platform to KMP, managing a team of 4-6 mobile engineers - Architected a unified KMP SDK monorepo consumed across multiple production apps - Built an award-winning KMM sticker app that placed 2nd in the official Telegram Contest - 4 completed Upwork jobs with 5.0 rating and 100% client satisfaction Tech stack: Kotlin, Jetpack Compose, KMP, Ktor, Apollo Kotlin (GraphQL), SQLDelight, Room, Coroutines/Flow, Retrofit, Firebase, GitHub Actions, Gradle Let's discuss how I can help build or improve your Android application.

I’m a Mobile Engineer focused on building modern, scalable, and user-friendly mobile applications using Kotlin, Swift, Jetpack Compose, and Firebase. Over the past few years, I’ve developed Android applications across healthcare, education, social media, food ordering, and productivity industries. I’ve also built and launched my own startup app, WakeBit — an anti-snooze productivity app that reached 2,600+ users on Google Play. My core stack includes: • Kotlin • Jetpack Compose • Firebase • REST APIs • MVVM / Clean Architecture • Coroutines & Flow • Room Database • Hilt Dependency Injection I can help with: • Full mobile app development • Modern UI/UX implementation • Firebase & backend integration • REST API integration • Bug fixing & performance optimization • Architecture improvements • Google Play Store deployment Projects I’ve worked on: • WakeBit — Productivity & alarm app • Ask Medy — AI-powered healthcare assistant • Musofir Uz — Russian patent exam preparation app • Food ordering platforms • Hospital management systems I also have experience collaborating on iOS UI redesign projects and working in fast-moving startup environments where speed, product quality, and user experience matter. I care about building apps that feel smooth, polished, and reliable for real users. I communicate clearly, learn quickly, and enjoy turning ideas into real products. Let’s build something great together.

Hello, I am an Android Developer with over 1 year of experience in this field. I have worked on several projects and continue to develop my skills. Are you ready to start your own project with me? Feel free to message me! My motto: "Do not be afraid to take the first step! Dreaming alone won't get you anywhere".

Buggy, slow, or hard-to-maintain Android apps cost you users, revenue, and reviews. I build Android apps that are fast, stable, and easy for your team to maintain long-term. Over the past 6 years I've delivered production apps across fitness, fintech, and e-commerce, including: - A fitness app with 100K+ downloads and stable 5-star performance - A financial app with secure biometric login - An e-commerce app with integrated payments - A real-time chat system with push notifications How I work with clients: - Understand your goals and users before writing a line of code - Build clean, maintainable Kotlin/Java code following Android best practices - Integrate APIs (REST, GraphQL, Firebase) and secure user data - Test thoroughly so you get a stable release, not a rushed one Tech: Kotlin, Java, Android SDK, Firebase, REST/GraphQL, Git If you need an Android developer who communicates clearly and delivers on time, message me with a bit about your project. I'll reply within a day with next steps.