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Hire the best Kotlin Developers in Kharkiv, UA

Check out Kotlin Developers in Kharkiv, UA with the skills you need for your next job.
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Rating is 4.8 out of 5.
4.8/5
based on 510 client reviews
  • $45 hourly
    • 5.0/5
    • (21 jobs)
    I am the founder of Nitrix, a software development company. I have specialized in web and mobile development for more than 10 years and now I can offer you a team of outstanding developers who can create excellent IT solutions for you and your business! Your idea will be realized with an attractive UI/UX design and a clean code that is easy to read, support, and implement additional functions. As a progressive software development company, we aim to create the most comfortable, smooth, and stable products for millions of users. Our specialists have developed different services and apps of various scales, importance, and spheres (medicine-related services, uber-like and dating apps, streaming services, news apps, etc). We have a solid understanding of the whole process of the software development cycle so your request will meet all modern requirements and standards. You can check our portfolio and reviews from previous clients below, so do not hesitate to write to me and we will discuss the reason that brought you here! Technologies we use: Flutter, Dart, Swift, Objective-C, Kotlin, Java, C#, JavaScript, PHP, MySQL, iOS SDK, CarPlay, tvOS, watchOS, Android SDK, Android Auto, Android TV, Wear OS, Google Chromecast, ExoPlayer, FFmpeg, RESTful, Sockets and many more!
    Featured Skill Kotlin
    Streaming Platform
    Web Development
    IPTV
    Web Design
    UX & UI
    Apple Watch
    Dart
    tvOS
    iOS Development
    iOS
    Android
    Swift
    Flutter
    Android App Development
  • $20 hourly
    • 5.0/5
    • (5 jobs)
    Hello there! Are you looking for a full time & dedicated full-stack Android developer to develop a user-friendly high-end functionality based Android mobile application? I would love to engage myself as a full-stack Android app developer and assist you using innovative and creative strategies. List of my skills that I will use to bring your project to perfection: - Programming languages: Java, Kotlin - Expertise in Android Jetpack (Room, Navigation, Lifecycle, Compose) - Architectural approaches: MVP, MVVM, Clean Arch. - Database: SQLite, Room - Libs: RxJava2/RxKotlin, Glide, Picasso, Retrofit, OkHttp, AndroidX, FirebaseCore, Gson, Material design - Version control: Git, BitBucket - Work with outside data sources and API’s
    Featured Skill Kotlin
    Android App
    Android SDK
    Java
    Android App Development
  • $50 hourly
    • 5.0/5
    • (29 jobs)
    🔥 I am a skilled expert IOS/Android & AI developer with 10 years of experience ! My technology stack for Mobile projects: 🧑‍💻 AI: TensorFlow, PyTorch, R, Machine Learning, Deep Learning, ChatGPT 🧑‍💻 Mobile development: Swift | Kotlin | Objective-C | React Native | Flutter | Java 🧑‍💻 Back-end: PHP (Laravel, Symfony, CakePHP) | NodeJS (Express) | Python (Django) | Java, Spring | Ruby | API servers 🧑‍💻 UI/UX design, UX audit, logo, and branding 🧑‍💻 QA: manual functional, tests automation Industries we work with and have vast expertise: 🔸 FinTech 🔸 Financial services; 🔸 Travel&Hospitality; 🔸 Real estate; 🔸 Restaurant business; 🔸 Bookings; 🔸 Taxi & Delivery; 🔸 Fitness and sports; 🔸 E-commerce; I use React Native and Flutter to create most of our mobile applications. React Native is a modern tool from Facebook that lets you create native apps for both iOS and Android using one codebase. Flutter is a technology from Google for the same thing. Using such platforms reduces development and maintenance costs while allowing you to use any native functionalities — cameras, GPS, and anything else available for native apps. If needed we can also write in Java, Swift, or Kotlin for specific things. What I can do to make your project successful: 🎯 I conduct a thorough Lean Inception or Project Discovery to validate your business idea early on 🎯 I analyze flowcharts, design or make code review and provide you with a detailed development plan together 🎯 You have budget limitations and need efficient and cost-saving development 🎯 You look for custom solutions to address your particular business objectives 🎯 You hesitate which of the mobile solutions (native or cross-platform) will work better for your project

 🔥 Top 1% of talent on Upwork. 🔥 Customer & business oriented approach

 Contact me, Vladyslav Yevtushenko
    Featured Skill Kotlin
    ChatGPT
    AI Implementation
    AI App Development
    Python
    AI Development
    AI Chatbot
    iOS Development
    Android App
    Mobile App Design
    Android App Development
    Flutter
    Mobile App Development
    Swift
    Native App Development
  • $40 hourly
    • 5.0/5
    • (2 jobs)
    Hi, i`m Eugene, Android developer with Master’s degree in Computer Engineering I`ve more than 3 years of commercial experiance with various Android projects. My main direction in which I work and improving myself is develop native Android applications using Java, Kotlin. I`m responsible, hard-working, open for new technologies and approaches. Technologies and tools: - Kotlin, Java - Android SDK - Dagger2, Koin - REST, Retrofit - RxJava 2 - Multithreading - SQLite, MongoDB - Git, Jira
    Featured Skill Kotlin
    Model View ViewModel
    Android SDK
    Android App Development
    Retrofit
    Model View Presenter
    RxJava
    Git
    Java
    SQL
  • $45 hourly
    • 5.0/5
    • (4 jobs)
    ⭐️⭐️⭐️⭐️⭐️ Expert in mobile app development ⭐️⭐️⭐️⭐️⭐️ Greetings! 👋🏻 My name is Yevhenii. I'm a seasoned Mobile Developer (Kotlin). 𝗠𝘆 𝗽𝗿𝗶𝗺𝗮𝗿𝘆 𝗴𝗼𝗮𝗹 𝘁𝗼 𝗵𝗲𝗹𝗽 𝗶𝗺𝗽𝗹𝗲𝗺𝗲𝗻𝘁 𝘆𝗼𝘂𝗿 𝗶𝗻𝘃𝗮𝗹𝘂𝗮𝗯𝗹𝗲 𝗶𝗱𝗲𝗮 𝘁𝗼 𝗹𝗶𝗳𝗲. 👨🏻‍💻 As a seasoned Mobile developer, having a lot of experience, I know how to approach many various and complex projects. Knowledge in mobile development and possession of all necessary skills allow me to provide you with a 𝘀𝗸𝗶𝗹𝗹𝗲𝗱 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗽𝗿𝗼𝗰𝗲𝘀𝘀 𝘁𝗼 𝘀𝘂𝗰𝗰𝗲𝘀𝘀𝗳𝘂𝗹𝗹𝘆 𝗿𝗲𝗮𝗹𝗶𝘇𝗮𝘁𝗶𝗼𝗻 𝗼𝗳 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁! I have the following skills: | ✅ Kotlin | ✅ Java | ✅ MySQL | ✅ MongoDB | ✅ Gradle | ✅ Git | Let's chat about your project and explore how I can help you bring your vision to life. 💡 Share me your invaluable idea 📩 Thanks for your time, Yevhenii
    Featured Skill Kotlin
    Moxy
    EventBus
    Dagger 2
    Android NDK
    Android SDK
    Butter Knife
    Realm Database
    SQLite
    Android App Development
    Android
    User Authentication
    Firebase
    Retrofit
  • $40 hourly
    • 5.0/5
    • (2 jobs)
    I'm professional Android Developer. I worked on such projects as Social Networks, Market Places, Cryptocurrency Trading Platform, Ride-sharing system, e.t.c. I use such technologies and approaches as: Kotlin, Java Android SDK MVVM/MVP Clean architecture Clean code Multi-module structure Dagger2/Koin Google Firebase Google Cloud Services RX/Coroutines Cicerone/Android Navigation I personally like music, board games and football
    Featured Skill Kotlin
    Firebase
    Tablet
    Dagger 2
    Clean Architecture
    Android
    Model View ViewModel
    Retrofit
  • $40 hourly
    • 5.0/5
    • (9 jobs)
    ✅ 100+ web & mobile projects with different types of business. ✅ 7 years of experience in IT. ✅ Dozens of satisfied clients with whom I work to this day ⚜️ I bring three core strengths: result, quality and support. ⚜️ ➡️ More about my skills ➡️ Web Development Backend Languages: PHP, Python, Laravel Database: MySQL Frontend Languages: JavaScript, ReactJS Technologies: HTML5, CSS3 CMS: WordPress, OpenCart Tools: Figma/Photoshop/Illustrator/AI tools I offer development of: 1. Landing 2. Complex website from scratch 3. Simple website from scratch 4. Frontend (layout) by your design 5. Online store on WordPress + Woocommerce 6. Plugins for WordPress 7. Themes for WordPress 8. Bots 9. Chrome extensions Mobile development Languages: Swift, Kotlin, C#, TS (React Native) Platforms: Android/iOS I offer development of: 1. Application on Android/iOS/WebGL/Web application 2. Simple Mobile Game 3. Distribution on Google Play or App Store on your accounts
    Featured Skill Kotlin
    CSS
    HTML
    jQuery
    WordPress
    Web Development
    TypeScript
    React
    Angular
    Python
    Swift
    PHP
    JavaScript
    iOS Development
    Android App Development
  • $35 hourly
    • 5.0/5
    • (9 jobs)
    10+ years commercial development; 9+ years in iOS development; Some projects: Daily Motivation & Inspiration Sing AR Fight (iOS, ARKit, Unity); Language Pal (iOS) Family Economist(iOS,RoR REST Server); Hello Pal (iOS); My Pizza Shop Maker (iOS); Booger Town (iOS); Children Fairy Tails (iOS); Sing or Fight (Windows Phone 7/8) Little Reader Touch (iOS) Spot the difference puzzle with funny stickers for kids and toddlers. (iOS)(Free/Premium) Match Up - Shape Matching Puzzle Game for Kids and Toddlers (iOS) (Free/Premium)
    Featured Skill Kotlin
    JSON
    iPad App Development
    iOS Development
    Mobile App Development
    Android
    Java
    Objective-C
    SQLite
    Swift
  • $35 hourly
    • 4.6/5
    • (51 jobs)
    I am Software Engineer with about 8 years of experience, mostly in Android App Development using Java. I have experience in architect complete software solutions (web, mobile and server) and project management. I worked on: - Android & iPhone app development - hybrid mobile application development (ionic ... xamarin, react native) - game development (Cocos2d-x ...) - API development | web services - Server solutions (including serverless solutions) - Taxi (client/driver) infrastructure projects - delivery projects - map and location/GPS based projects - social networking projects - coupon systems - qr code technology usage - IoT projects - real estate inspection apps - interaction with BLE devices (BLE 4, BLE 5 Coded Phy) - Mobile apps Reverse Engineering (de-compilation, creation of mods, API extraction, decryption) - chat-bot creation - Instant Apps Integration
    Featured Skill Kotlin
    App Development
    Git
    Reverse Engineering
    Mobile App Development
    Web Service
    Android
    PHP
    Java
  • $60 hourly
    • 5.0/5
    • (12 jobs)
    Welcome to my profile! I’m a mobile and AR/VR app development expert with 10 years of experience in the field. I am keen on cutting-edge technologies and helping businesses achieve their objectives. But, as a technical expert, I also embed my unique approach to working with clients: Solid requirements analysis and elicitation - Offering at least a couple of project scope realization options - Visualization of the possible technical strategy in a format of a demo Recently I’ve been involved in a bunch of AR researches as a part of my core expertise to stay in touch with new technological insights and keep my professional expertise up to the industry best practices. Besides these, here is a list of bells and whistles I can also provide: Technologies: - iOS, macOS, watchOS, tvOS - ARKit, ARCore, RealityKit, SceneKit - Swift, Objective-C, LiDAR - Kotlin, Java, Dart, C++ - Beacons, Bluetooth, IoT, Location, and Mapping Domains: - Retail - Construction and Real Estate - Aviation, Tourism, Travel - Entertainment and Social networking - Marketing and Advertising - Fintech - Insurance - Industrial Project types: - Mobile application - Standalone module, Framework, SDK - AR Proof of Concept - Companion mobile app (to comply with an existing web/desktop software) - Demo I’m open to both consultancy and development opportunities. Feel free to get in touch with me and my team if you want to discuss a mobile or AR application idea, I am sure I will have valuable and interesting ideas to share with you!
    Featured Skill Kotlin
    Mesh Fabric
    Mac OS App Development
    iPad App Development
    Mobile App Improvement
    iOS Development
    Mobile App Development
    Android App Development
    Dart
    Flutter
    Swift
    Objective-C
    Augmented Reality
  • $50 hourly
    • 5.0/5
    • (65 jobs)
    Hey there! I’m a Full-Stack Developer specializing in building high-performance web and mobile applications. With a focus on seamless user experiences and scalable architectures, I turn complex ideas into beautifully crafted solutions. 💼 $400K+ earned | 145+ successful projects | Top Rated Freelancer 🛠 What I Do Best: Custom Web Applications – Scalable and maintainable solutions tailored to your business needs. Cross-Platform Mobile Apps – High-performance apps using React Native and Flutter for iOS and Android. Backend Architectures – Reliable and efficient backend systems with Node.js and Express. Real-Time Applications – WebSocket integration for live updates, messaging, and interactive experiences. Cloud Solutions & DevOps – Scalable cloud infrastructure on AWS and Google Cloud, CI/CD pipelines. 🔥 Tech Stack That Delivers Results: 🖥️ Frontend Mastery In React.js – 9 years In Next.js – 7 years In Vue.js – 6 years In TypeScript – 8 years In Tailwind CSS / Material-UI – 7 years ⚙️ Backend Powerhouse In Node.js – 10 years In Express.js – 9 years In MongoDB – 8 years In PostgreSQL / MySQL – 9 years In GraphQL – 7 years In RESTful APIs – 10 years 📱 Mobile Excellence In React Native – 8 years In Flutter – 7 years In SWIFT – 7 years In Kotlin – 6 years ☁️ Cloud & DevOps Solutions In AWS (EC2, Lambda, S3) – 9 years In Google Cloud – 8 years In Docker / Kubernetes – 9 years In CI/CD Pipelines – 6 years 🏆 Cool Projects I’ve Delivered: E-commerce Platform – Built a custom web and mobile solution with integrated payment systems, handling 100K+ daily users. Healthcare App – Developed a cross-platform mobile app with real-time chat and appointment scheduling for millions of users. SaaS Dashboard – Created a scalable admin dashboard with complex data visualizations and real-time analytics. Social Media App – Implemented a React Native app with live messaging, push notifications, and media sharing. 🚀 Why You Should Work With Me: 10+ years of Full-Stack Development – Proven track record in delivering robust and scalable solutions. Cross-Platform Expertise – Unified codebases with React Native and Flutter for iOS and Android. Performance-Driven Architecture – Fast, reliable, and maintainable systems with clean, modular code. Client-Centric Approach – I prioritize your business goals and ensure seamless communication throughout the project. All-in-One Solution – From frontend UI/UX to backend infrastructure and cloud deployment, I handle everything. 💡 Ready to build your next big project? Hit the Invite button, and let’s make it happen! 🚀 🔑 Skills & Technologies: Full-Stack Development React.js / Next.js / Vue.js React Native / Flutter Node.js / Express.js MongoDB / PostgreSQL / MySQL RESTful APIs / GraphQL TypeScript / JavaScript Tailwind CSS / Material-UI AWS / Google Cloud Docker / Kubernetes CI/CD Pipelines Cross-Platform Mobile Development
    Featured Skill Kotlin
    Mobile App Development
    Windows Administration
    Web Development
    Bash Programming
    Virtualization
    Swift
    Angular
    Terraform
    Node.js
    Load Balancing
    React Native
    DevOps
    .NET Core
    Amazon Web Services
    Linux System Administration
    Docker
    React
    Network Administration
    Symfony
    Laravel
    Service Cloud Administration
    Kubernetes
  • $75 hourly
    • 5.0/5
    • (20 jobs)
    A self-taught, purposeful, and enthusiastic software engineer with 9+ years of practical experience, specializing in Java, Android, Kotlin, automated testing, Team Leadership, and Agile methodologies. I head the Android department in New Line Technologies, and my responsibilities include developing and supporting software, communicating with customers, and mentoring subordinate developers. I have extensive experience in * the independent development of Android projects from scratch to app release on Google Play. * e-commerce projects. * work with AI models (TensorFlow, ONNX) * multi-media projects: live video streaming (using RTMP, UDP), video processing in real-time, video post-processing. * using devices hardware: WiFiDirect, Bluetooth, magnetometer, GPS. * work with a Bitcoin protocol, a Dash protocol, and a Bitcore wallet service/client. * large projects with globally distributed teams. * mentoring, code refactoring, troubleshooting, optimizing, and performance tuning. I became the Android team leader in only a year and a half due to my passion for software development and my skills in solving challenging tasks. In my spare time, you can find me in a gym squatting with a bar, playing with my son, or reading self-improvement books.
    Featured Skill Kotlin
    User Authentication
    In-App Purchases
    Android
    User Profile Creation
    Smartphone
    Firebase
    Tablet
    Native App Development
    Java
  • $50 hourly
    • 0.0/5
    • (2 jobs)
    Hello there, I’m Daniil, a results-driven Android Engineer with a Master’s degree in Computer Science and 5+ years of experience in Software Engineering. Passionate about building reliable, smooth, scalable, and high-performance mobile applications. I thrive on optimizing performance, reducing technical debt, and enhancing app stability – delivering solutions that impact millions of users worldwide.
    Featured Skill Kotlin
    Git
    Android Room Persistence
    Android SDK
    Android App Development
    Android
    Java
    Android Studio
    Flutter
  • $17 hourly
    • 5.0/5
    • (1 job)
    I am developing mobile and web applications. Work experience more than 5 years. Always in touch, open to suggestions)
    Featured Skill Kotlin
    MySQL
    Figma
    Mobile App Development
    iOS
    JetPack
    Android
    JavaScript
    Telegram
    WebGL
    Unity
    Construct 3
    HTML5
    Mobile Game
  • $33 hourly
    • 0.0/5
    • (1 job)
    - 10 years, Engineer: Developed projects of any complexity from beginning to production; - 7 years, Project Lead: Led projects with small/large teams: Process management / Risk management; - 5 years, Manager: Created roadmaps for a team with divided responsibilities and priorities; - 5 years, Mentor: Mentored engineers on a bench to the next level (Junior/Middle/Senior); - 7 years, Tools Expert: Maintained and developed tools to improve development velocity: Tools / Plugins / Documentations / Tech Templates / CI/CD scripts. ACHIEVEMENTS Startup Owner - Created a personal startup (Quest Helper GO) with almost 500.000 downloads, and an average rating of 4.1-4.7 out of 5.0. - Architect: Updated the architecture of a project by implementing a new multi-module architecture from a single-module utilizing Dagger 2 for Dependency Injection (excluding Dagger Android). Spearheaded the creation of the new architecture, provided mentorship to the existing team, authored comprehensive documentation, and delivered instructional lectures. The transition to a multi-module architecture significantly expedited the development of new features and project assembly. PROJECTS Project Lead & Developer: - Taxi driver (Led a team of 20 Android developers: knew and managed the entire technical base of the project; Created a roadmap; Managed migration to a multi-module project); - Photo recorder for roads (Created backpressure strategies with max optimization and speed of work app); - Experienced with AOSP (Providing risk factor assessments; Writing documentation for root applications; Simultaneously managing two different teams). As a main Developer that includes but is not limited to Research / Estimate / General development: - Analyzed screenshot/video streams using AI/ML and displayed information on top of the game; - Custom keyboard system; - Auto-clicker via Accessibility service; - Battery Saver and System Cleaner; - Animal feeder Bluetooth assistant; - Open-source libraries - ORM / Ads provider; - Encrypted messenger using RSA / AES.
    Featured Skill Kotlin
    JUnit
    Room
    Google Ads
    Retrofit
    Dagger 2
    Firebase
    RxJava
    Coroutine
    Clean Architecture
    Android
  • $45 hourly
    • 0.0/5
    • (1 job)
    10 years experience in Mobile Development. 9 years in Android Development 5 years in Flutter Development. 2 years in IOS Development. Flutter Stack GetX, MobX, Riverpod, Provider, Redux, Bloc, Material / Cupertino Ul, Hero, Svg, Image caching, Intl, Equatable, Dio, Chopper, Get It, Injectable, Freezed, Lint, Auto Route, Go Router, RxDart, FpDart, Hydrated Bloc, Hooks, Gen, Build runner, Json serializable, In-app purchases, Stripe, Paypal, Image cropper, Platform maps, Google maps, Google places, Location, Apple Maps, Here Maps, Mapbox, Geocoding, Firebase (Crashlytics, Firestore, Remote Config, Messages, Auth, Storage), Local notifications, Algolia, GraphQL, Social logins (Google, Apple, Facebook), Flutter Blue, Sqlite, Secure storage, Shared preferences, Hive, Isar, Drift, Realm, Supabase, Pedantic, WorkManager, Video Player, QR, Barcode scanner, Audio players, Just Audio, FFmpeg, Doting, Integration testings, Mockito Firebase mocks, Bloc test, Widget testis, Platform channels, Webview, Lokalise, Localazy, Lottie, FI Chart, We b Sockets, Camera, Encrypt, Obfuscation, Protobuf, Mason, FlutterFlow Android Stack Java, Kotlin, Dart, Swift, Android SDK, Flutter, Jetpack, Room, DataStore, Databinding,ViewBinding,Paging, Navigation, Work Manager, Coroutines, Compose, MVP/ MVVM, Okhttp, Retrofit, GSON, Moshi, Camera X, RKotlin, RxBus, Dagger 2, Hilt, Moxy, Cicerone, Glide, Picasso, Fresco, Android annotations, Butterknife, Firebase Crashlytics. Facebook SDK / Graph Api, Google Auth, Firebase messaging, Remote Config, Firebase Auth, Firestore, App Distribution, ExoPlayer / ExoMedia, FFmpeg, Google Billing, Biometric Api, In-app purchases, PayPal, Stripe, Branch 1O, Google Maps, Here Maps, Mapbox, Distance Api, Routes Api, Mixpanel, Amplitude, Findbugs, Flurry, Barcode a n d NFC scanners, Files picker,Sqlite, Realm, Parse,GraphQL, Supabase, GreenDao, Junit, Mockito, Espresso, Roboelectric, Leakcenary. Custom views, Git, CI/CD (Circle Cl, Codemagic, Fastlane), Bluetooth BLE/BTC, Protobuf, AES Encryption IOS Stack Swift, MVC, MVVM, UIKit, MapKit, CocoaPods, RESTful APIs, JSON
    Featured Skill Kotlin
    Supabase
    Git
    Android SDK
    Swift
    Firebase
    Android
    Flutter
    iOS
  • $50 hourly
    • 0.0/5
    • (1 job)
    I am an experienced mobile app developer specializing in iOS and Android platforms. With 10 years of industry experience, I have a strong track record of delivering high-quality mobile applications for clients. My goal is to create intuitive, user-friendly, and engaging mobile experiences that meet client objectives and exceed user expectations. Skills: Mobile App Development: iOS (Objective-C, Swift), Android (Java, Kotlin) UI/UX Design: User-centric design, responsive layouts API Integration: RESTful APIs, JSON parsing Database Integration: SQLite, Core Data, Room Push Notifications: Apple Push Notification Service (APNS), Firebase Cloud Messaging (FCM)
    Featured Skill Kotlin
    Xamarin
    Mobile App Development
    Android App Development
    Swift
    Objective-C
    iOS Development
  • $24 hourly
    • 5.0/5
    • (1 job)
    3+ years of commercial experience. Focused on delivering high-quality, high-performance, scalable, maintainable, and robust applications that provide seamless user experiences. Skills & Technologies: — Languages: Kotlin, Java — Architecture & Patterns: Clean Architecture, MVVM, MVP, MVC, MVI — UI/UX Development: Jetpack Compose, XML Layouts — Networking: Retrofit2, Ktor, OkHttp — Real-Time Data Tracking: WebSockets — Data Streams: Flow, LiveData — Concurrency: Coroutines, RxJava — Dependency Injection: Koin, Hilt, Dagger — AR/VR: ARCore — Cloud Services: Firebase, Google Services, Microsoft Azure — Cache & Storage: Okio, Room Database, SharedPreferences — Payment: Stripe, Liqpay, Google In-App Purchases — SDK's: Facebook, OneSignal, Adjust — Version Control System: Git — Methodologies: OOP, OOD/SOLID, RESTful API — Design Tools: Figma, Photoshop — Others: Coil, Picasso, Glide, Gson, Moshi, FFmpeg Additional Skills: Unity, C# About me: I am an experienced Android Developer with a proven track record in delivering high-quality applications for businesses of all sizes. My expertise spans the entire lifecycle of app development: from designing robust architectures and breaking down modules to implementing features and ensuring a seamless launch on the Google Play Store. I am skilled in joining ongoing projects, quickly understanding existing codebases, and resolving complex issues. Additionally, I have experience with Unity, which complements my Android specialization, expanding my capabilities and allowing me to leverage both technologies effectively. I’ve worked on 5 major projects - 3 of which I brought to release on the Play Store, and 2 that were already released when I joined. Additionally, I have completed 30+ smaller freelance projects. Throughout my career, I’ve focused on delivering scalable, optimized apps that meet the latest development standards with clean, maintainable code. My experience with Unity broadens my approach to Android development, enabling me to explore innovative solutions. If we decide to collaborate, I’ll ensure that your product gets the attention it deserves and is delivered efficiently.
    Featured Skill Kotlin
    SQLite
    Firebase
    API Development
    Room
    Git
    Koin
    Java
    Google Gson
    Retrofit
    Coroutine
    Microsoft Azure
    JetPack
    ARCore
    Android App Development
  • $35 hourly
    • 4.7/5
    • (15 jobs)
    Hello 👋🏻 my name is Dmitro, I'm seasoned 𝗔𝗻𝗱𝗿𝗼𝗶𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 👨🏼‍💻 🙌🏻 Welcome to my Upwork profile! 𝗜 𝗮𝗺 𝗮 𝘀𝗸𝗶𝗹𝗹𝗲𝗱 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 𝘄𝗶𝘁𝗵 𝗮 𝘄𝗲𝗮𝗹𝘁𝗵 𝗼𝗳 𝘁𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗸𝗻𝗼𝘄𝗹𝗲𝗱𝗴𝗲 𝗮𝗻𝗱 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 🦾 My expertise lies in programming languages such as RxJava, Kotlin, and Erlang. Additionally, I am well-versed in various architecture patterns including MVVM, MVI, and MVP. I have a deep understanding of libraries such as Retrofit, Moxy, EventBus, OrmLite, Dagger2, Picasso/Glide, and PhotoView. ✅ My experience also extends to external services including: 𝗧𝘄𝗶𝘁𝘁𝗲𝗿 | 𝗙𝗮𝗰𝗲𝗯𝗼𝗼𝗸 | 𝗚𝗼𝗼𝗴𝗹𝗲 | 𝗚𝗼𝗼𝗴𝗹𝗲 𝗔𝗣𝗜 | 𝗙𝗶𝗿𝗲𝗯𝗮𝘀𝗲 | 𝗖𝗿𝗮𝘀𝗵𝗹𝘆𝘁𝗶𝗰 | 𝗙𝗮𝗯𝗿𝗶𝗰 | 𝗜𝗻𝘀𝘁𝗮𝗯𝘂𝗴 | 𝗙𝗶𝗿𝗲𝗯𝗮𝘀𝗲. ✅ I am proficient in various web technologies such as: 𝗛𝗧𝗧𝗣/𝗛𝗧𝗧𝗣𝗦 | 𝗥𝗘𝗦𝗧 | 𝗝𝗦𝗢𝗡 | 𝗛𝗧𝗠𝗟 | 𝗖𝗦𝗦 | 𝗫𝗠𝗟 | 𝗦𝗤𝗟𝗶𝘁𝗲 | 𝗦𝗤𝗟. I have a solid understanding of source control systems such as 𝗚𝗶𝘁 and 𝗦𝗩𝗡, and PM systems such as 𝗥𝗲𝗱𝗺𝗶𝗻𝗲, 𝗝𝗜𝗥𝗔, 𝗧𝗲𝗮𝗺𝘄𝗼𝗿𝗸, 𝗧𝗿𝗲𝗹𝗹𝗼. I have experience with the following areas: 𝗦𝗮𝗮𝗦 | 𝗘𝗱𝘂𝗰𝗮𝘁𝗶𝗼𝗻 | 𝗛𝗲𝗮𝗹𝘁𝗵𝗰𝗮𝗿𝗲 | 𝗦𝗼𝗰𝗶𝗮𝗹 𝗠𝗲𝗱𝗶𝗮 | 𝗜𝗳 𝘆𝗼𝘂'𝗿𝗲 𝗿𝗲𝗮𝗱𝘆 𝘁𝗼 𝘁𝗮𝗸𝗲 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝘁𝗼 𝘁𝗵𝗲 𝗻𝗲𝘅𝘁 𝗹𝗲𝘃𝗲𝗹, 𝗹𝗲𝘁'𝘀 𝗱𝗶𝘀𝗰𝘂𝘀𝘀 𝗶𝘁! Don't hesitate to send me a message, so we can chat more about how I can help you achieve your goals. I'm excited to hear from you! 📩
    Featured Skill Kotlin
    Camera
    Application Security
    Android Studio
    Android SDK
    3D Modeling
    User Profile Creation
    JavaScript
    User Authentication
    Smartphone
    iOS
    Mobile App Development
    Android App Development
    Android
  • $30 hourly
    • 5.0/5
    • (31 jobs)
    I am an experienced Senior Android Developer passionate about building robust and innovative mobile applications. I have a proven track record of delivering high-quality solutions that meet business requirements and user expectations. With more than 10 years of experience in the field, I deeply understand the Android platform and related technologies. Throughout my career, I have worked on various projects, ranging from consumer-facing apps to enterprise-grade solutions. I am well-versed in the entire app development lifecycle, from concept to delivery, and have expertise in areas such as UI/UX design, performance optimization, and testing. My strengths lie in my ability to work collaboratively with cross-functional teams, communicate complex technical concepts to non-technical stakeholders, and mentor junior developers. I am constantly looking to stay up-to-date with the latest industry trends and technologies and have a keen interest in exploring emerging platforms such as wearables and IoT.
    Featured Skill Kotlin
    JetPack
    Clean Architecture
    Android SDK
    RESTful Architecture
    Android
    Java
    Firebase
    Mobile App Development
    Mobile App
    Google APIs
    Android NDK
    Android App Development
    Google Play
    Android Studio
  • $40 hourly
    • 0.0/5
    • (0 jobs)
    As a CEO and Lead Tech Architect with 7+ years of experience, I specialize in delivering end-to-end digital solutions from mobile apps to full-stack web platforms. My team at 7devs excels in native mobile development (Swift, Kotlin, Java, Objective-C) and full-stack web development (MERN, MEAN, React, Node.js, Next.js, Nuxt.js, Electron, Ruby on Rails), helping businesses scale with robust, future-proof technology. Why Partner With Me? - Full-Cycle Expertise: From wireframing to deployment, I manage cross-functional teams (design, QA, DevOps) to deliver projects on time and within budget. - Technical & Business Alignment: I focus on **ROI-driven development**, minimizing technical risks while ensuring solutions align with your market goals. - Startup Mentality: Built apps and web platforms for Fortune 500 companies and bootstrapped startups I adapt to your scale, resources, and vision. - Proven Leadership: As CEO, I’ve scaled a remote-first team of 15+ developers, mentoring junior talent and improving team velocity by 25% through Agile/Scrum adoption. Recent Success Stories - Led a 12-month healthcare app project (iOS/Android) for a U.S. client, reducing patient onboarding time by 40% through optimized native workflows. - Architected a real-time logistics app used by 50k+ drivers, leveraging Swift and Kotlin for <100ms API response times. - Developed a full-stack e-commerce platform using MERN stack, increasing client revenue by 30% through improved user experience and performance. - Built a cross-platform desktop app using Electron, enabling seamless integration with existing web and mobile systems. Technical Expertise - Mobile: iOS (Swift, Objective-C, Xcode), Android (Kotlin, Java) - Web: MERN (MongoDB, Express, React, Node.js), MEAN (MongoDB, Express, Angular, Node.js), Next.js, Nuxt.js, Electron, Ruby on Rails - Project Management: Agile/Scrum, Jira, Trello, Risk Mitigation, Budget Forecasting - Leadership: Team Building, Stakeholder Communication, Product Roadmapping Let's rock your industry together!!!
    Featured Skill Kotlin
    Agile Project Management
    Scrum
    Project Management
    Apple Xcode
    Java
    Objective-C
    Mobile App Development
    Swift
    Android App Development
    iOS Development
    Native App Development
    Mobile App
    Android
    iOS
  • $35 hourly
    • 4.5/5
    • (2 jobs)
    Project Management is the thing that I enjoy and have skills for. I have been working in this sphere for more than 5 years and know how to deal with obstacles of any kind and solve the problems that may occur on the path of delivering a qualitative product which corresponds to all customer's requirements. If you want a reliable person who is capable of performing multiple tasks simultaneously with no loss in quality, I am ready to help you. To give you a small insight into my average working day here is an approximate list of my responsibilities: - Define the scope of work necessary for the project creation in close collaboration with the customer and the development team; - Develop a detailed project plan to track progress; - Coordinate internal resources for the flawless execution of their tasks and objectives; - Represent the client's interests and provide advice on the management side; - Establish and maintain the communication between the client and the team of developers; - Keep track of the project performance using appropriate systems, tools and techniques; - Manage changes in the work scope, schedule, and costs; - Review the quality of the work completed with the development team to ensure that it meets all the standards. I will stand by your side like a bodyguard and guarantee that the delivery of your product will go as smoothly as possible throughout all stages.
    Featured Skill Kotlin
    .NET Core
    MySQL
    MongoDB
    SQLite
    Swift
    Map Integration
    Flutter
    Firebase
    Tablet
  • $20 hourly
    • 0.0/5
    • (1 job)
    SUMMARY I am skilled and enthusiastic developer, with more than 4 year of experience with C# and .Net platform and about 3 years of native Android development. I am quick-learner, curious for every new technology while also always being up for a challenge challenges. In addition to this, I am a strong team-player, who was working on a lot of projects, both commercial and non-commercial.
    Featured Skill Kotlin
    JavaScript
    Mobile App Development
    JetPack
    ASP.NET
    Android App Development
    Android
    UI/UX Prototyping
    Figma
    GUI Design
    UX & UI
    GitHub
    Git
    React
    C#
  • $22 hourly
    • 0.0/5
    • (0 jobs)
    — Strong Solidity and Ethereum experience — Deep technological understanding of cryptocurrency — Truffle/Hardhat — Experience of deployment of blockchain apps to production — Knowledge of the DeFi industry — Experience of smart contract audit conduction — Familiarity with P2P networks
    Featured Skill Kotlin
    Blockchain, NFT & Cryptocurrency
    Blockchain Development Framework
    Blockchain
    Golang
  • $3 hourly
    • 5.0/5
    • (1 job)
    I'm a developer from Ukraine, who have my own projects, applied on Google Play Store. I'm very tactful, smart, sharp, excellent at communicating with people. I am very purposeful and always find answers to questions I don’t know. Ready to complete your assignments and improve your programming skills. I really hope for feedback
    Featured Skill Kotlin
    Unity
    MySQL
    C#
    Android
  • $20 hourly
    • 0.0/5
    • (1 job)
    Hi, my name is Andrey and I have over 4 years of experience as an Android developer and 3+ years of experience as Windows Phone mobile (Microsoft) developer. Last 3+ years I worked in companies where I created more than 20 apps (some of them you can find in my portfolio). That helped me to get an experience in creating and supporting apps. Skills: - Programming Languages: Java, Kotlin. - Android architecture patterns: MVP, MVVM, Clean Architecture. - Multithreading: Coroutines, Flow, Channels, RxJava2.0, Executors. - DI: Dagger 2, Hilt, Koin. - Databases: Room, Realm, Firebase ORM, Paper. - Navigation: Navigation Architecture Component, Cicerone. - VCS: Github, Gitlab, Bitbucket. - Technologies and Libraries: Retrofit 2.0, RxBinding, Glide, Biometric, Audio/Video Calls (Agora), ExoPlayer, NovaCrypto, SignalR, Android Jetpack (Navigation, ViewModel, LiveData, Paging), SQLite, Socket.IO, Camera 2 API, Stetho, JodaTime, JUnit4, Firebase services (Auth, Analytics, Messaging, Real-time Database, Dynamic Links). I'm learning new skills every day and this helps me to work fast and provide top quality apps. Speed and efficiency are what I focus on when creating a project I will be very glad to cooperate with you.
    Featured Skill Kotlin
    Dagger 2
    Clean Architecture
    Java
    Realm Database
    Retrofit
    Android
    Firebase
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