Hire the best Kotlin Developers in Hanoi, VN
Check out Kotlin Developers in Hanoi, VN with the skills you need for your next job.
- $15 hourly
- 5.0/5
- (12 jobs)
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. 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 🟠 JsoupKotlin
Android SDKAndroid StudioMobile App DevelopmentJavaFirebaseAndroid App DevelopmentAPI IntegrationAndroidNative App Development - $30 hourly
- 5.0/5
- (12 jobs)
I work as full stack developer Main stack ✅Front-end: Jquery, React, redux, nextjs, swr, react-query, vuejs, angular ✅Mobile: kotlin ✅Back-end: nodejs, nestjs, expressjs, socket.io, Kafka ✅Database: postgresql, mysql, mongoDB, redis, influxdb, SQLite ✅Cloud Service: AWS (S3, EC2) ✅Other tool: Docker/Docker-compose, Kubernetes, Git, Gitlab, and Github, CI/CDKotlin
Amazon S3LinuxCI/CDMaterial DesignReduxVue.jsAngularExpressJSJenkinsRedisTypeScriptPostgreSQLReactjQuery - $25 hourly
- 5.0/5
- (32 jobs)
I’m a Senior Software Engineer with 10+ years experience in customizing AOSP, developing Android applications for various of products including Smartphone, TV, IOT and Automotive. I am able to fully manage your project from start to finish with the best quality and time manner. Honesty and dedication is my key which I give my customer to win work.Kotlin
Reverse EngineeringTestingMicrosoft AzureScriptExcel MacrosCI/CDArchitectural DesignAOSPAutomotiveMobile App DevelopmentJavaPythonAndroidSmartphone - $35 hourly
- 4.4/5
- (20 jobs)
Over the span of 11 years, I've immersed myself in the realm of native Android application development, culminating in a diverse portfolio that encompasses an array of dynamic projects. This includes the creation of highly secure and encrypted communication platforms (OTTs), innovative social networks, robust cryptocurrency exchanges, efficient system utilities, intuitive online stores, intelligent smart assistants, and a wide spectrum of other application categories. At the core of my skill set is the art of crafting resilient and high-performance Android applications that seamlessly traverse the landscape of various devices – from smartphones to tablets – all while optimizing CPU and memory resources. My expertise extends beyond coding; I possess extensive experience in architecting efficient team workflows, along with a keen eye for conducting meticulous code reviews, ensuring the delivery of exceptional projects. My hands-on proficiency involves constructing formidable codebases using the MVP/MVVM architecture, employing languages such as Java and Kotlin, and harnessing the power of Gradle. This proficiency is underscored by a deep-seated understanding of essential object-oriented programming concepts, a rich repertoire of software design patterns (including Singleton, Observer, Factory, and Decorator), comprehensive testing methodologies (spanning Unit, Integration, and Automated UI tests), and a spectrum of cutting-edge technologies that have been embraced by the Android development community. As I embrace new horizons, I am actively seeking opportunities not only to engineer and deliver top-tier applications but also to offer innovative solutions that can fuel the growth of your business. I invite you to connect with me, and let's collaboratively shape the trajectory of your applications and business endeavors.Kotlin
Performance OptimizationModel View PresenterObject-Oriented ProgrammingAndroid SDKAndroid App DevelopmentGradleAndroid StudioChat & Messaging SoftwareAPI IntegrationSQLiteAndroidJavaNative App Development - $20 hourly
- 5.0/5
- (3 jobs)
Dear Customers, I'm a mobile developer with a product mindset. I have more than 6 years of experience at 2 start-up companies, building everything from nothing. I also have some side Android apps with 200k+ downloads on Google Play store, you can check them on Portfolio. You can get me to build your Flutter, iOS apps, and also Android apps. All apps will be made carefully and perfectly by following a strict timeline. You can see things done week by week. If you have time, you can discuss closely with me every single detail of your apps. But, I only charge you a reasonable price. I'm open to any negotiations. So feel free to ask for a discount if it makes you feel more comfortable. I hope we will have a long-term working relationship. And I wish you all the best with your business plans. Best regards, Tung Nguyen.Kotlin
Flutter StackiOS DevelopmentSmartphoneMobile App DevelopmentiOSAndroid App DevelopmentFlutterAndroidDartNode.js - $20 hourly
- 4.6/5
- (9 jobs)
I am a highly skilled React Native developer with 4.5 years of experience in crafting innovative, high-performance mobile applications. My expertise spans various technologies, including React, Node.js, WebSocket, Stripe API, Agora, WebRTC, and Google Cloud Platform..., from chat applications, and e-commerce apps to delivery apps. I have a proven track record of optimizing applications for seamless user experiences and have effectively collaborated with diverse teams to deliver outstanding results. My strong communication skills enable me to work effectively with technical and non-technical stakeholders, ensuring everyone stays on the same page throughout the development process. As a proactive problem solver, I always seek new challenges and opportunities to expand my skill set. With my diverse technical knowledge and passion for creating exceptional user experiences, I am well-equipped to contribute to various projects, from real-time communication applications to secure e-commerce solutions. My dedication to continuous learning and improvement ensures that I stay at the forefront of the ever-evolving world of technology, making me a valuable asset to any team.Kotlin
React NativeFirebase Cloud FirestoreSwiftAgora.ioMobile Development FrameworkAndroidiOSRESTful APIRealm DatabaseReactApp Design - $10 hourly
- 5.0/5
- (2 jobs)
Hello and welcome to my Upwork profile! My English name is Antony, and I am a skilled mobile app developer with expertise in Android and Flutter app development. With over 2 years of experience in the industry, I have a strong understanding of the mobile app development process, from concept to deployment. I am well-versed in programming languages such as Java, Kotlin, and Dart, as well as in using popular development tools like Android Studio and Visual Studio Code. My experience has allowed me to develop a wide range of mobile applications, from simple utility apps to complex, feature-rich applications with advanced functionality. I have experience working on projects of various sizes, from solo projects to large team efforts. When working with clients, I prioritize clear communication and collaboration to ensure that their vision for their app is brought to life. I am committed to delivering high-quality, efficient, and user-friendly apps that meet the unique needs of each client. If you are looking for an experienced Android or Flutter app developer who can deliver exceptional results, please don't hesitate to contact me. I look forward to working with you!Kotlin
Spring DataFlutterPostgreSQLSpring BootJavaWordPressMobile AppAndroid App DevelopmentMobile App Development - $5 hourly
- 5.0/5
- (1 job)
Hi There 👋 My name is Dang Hung and currently living in Hanoi, Vietnam. I have more than 5 years of experience in web development. My expertises include: 🌟 Programming: Golang, PHP, JavaScript, TypeScript, Swift, Kotlin, Objective-C, Java 🌟 Platforms/Services: Firebase, Amazon AWS, Facebook Developer API 🌟 Frameworks: Laravel, React-Native, React.js, Vue.js, Nuxt.js, Next.js 🌟 Databases/Queue: MySQL, PostgreSQL, MongoDB 🌟 Operation: Caddy, Docker, K8s I am passionate about something new that makes me a faster learner in technology that can help my clients grow their projects or businesses. Thank you for your attention. Best Regards.Kotlin
Mobile AppAndroidMongoDBObjective-CReact NativeAndroid AppDockerNext.jsReactNode.js - $25 hourly
- 5.0/5
- (3 jobs)
Why you should choose me: —----------------------------- 🌟 Customer first 🌟 Daily / Weekly report for project status 🌟 100% transparency, no unrealistic commitment. 🌟 No Advance Payment 🌟 UNLIMITED DESIGN REVISION for your utmost satisfaction 🌟 6 months of FREE Support. Industries We Serve —----------------------------- o Edtech o Healthcare o Fitness / Wellness o Sports o Fintech o Travel o Entertainment o Furniture Solutions We Provide —----------------------------- o Custom Software Development o SaaS Product Development o Mobile Apps Development o Generic AI Services o IoT Services o Ui/UX Implementation o AWS DevOps Development Technologies We Serve in Mobile apps(IOS and Android) and Website/Web applications and Software development --------------------------------------------------------------------------------------------------------------- - Full Stack and MERN Stack Development o React JS o Node JS o Vue JS o Laravel o Wordpress o Shopify - Mobile Apps Development o React NativeKotlin
REST APIFlutterSwiftReact NativePostgreSQLMySQLDjangoNode.jsVue.jsAngular - $45 hourly
- 0.0/5
- (0 jobs)
I am a qualified and professional Mobile Developer with nearly 4 years of experience in front-end development, specializing in Android applications. My strong creative and analytical skills enable me to solve complex problems under pressure and adapt quickly to new environments. Known for bringing positivity and humor to the workplace, I contribute to a collaborative and joyful atmosphere. I have extensive experience working with modern Android development tools and technologies, including Android Jetpack libraries (Paging, Hilt, Navigation, RoomDatabase, and WorkManager), and I am skilled in implementing MVC, MVVM, and MVI architectural patterns. My expertise includes multi-threaded processing using Java/Kotlin, custom views, and UI optimization, as well as writing unit tests to ensure code reliability. I am also proficient in RESTful API integration, JSON handling, and version control using Git. With hands-on experience in Firebase and Google Cloud services such as Firestore, Authentication, and Dynamic Links, I bring specialized knowledge in application performance improvement and Android security best practices, including Biometric Authentication, SafetyNet API, and SSL Pinning. Additionally, I have worked with third-party libraries like PhotoEditor and MpChart and am experienced in Scrum/Agile methodologies for team collaboration. My passion for learning new technologies and my readiness to take on challenging projects make me a great fit for innovative companies. I look forward to contributing my skills to deliver impactful mobile solutions.Kotlin
Agile Project ManagementJetPackFirebase Realtime DatabaseRESTful APIAndroid SDKUnit TestingRemote SensingUX & UI DesignArtificial IntelligenceScrumLeadership SkillsAndroid App DevelopmentAI App DevelopmentMobile App - $30 hourly
- 5.0/5
- (11 jobs)
🏆 TOP RATED PLUS (1% OF UPWORK) 🏆 💪💻 OVER 10 YEARS EXPERIENCE 🤵 RELIABLE PARTNER I offer great service and long-term support to my clients. You are looking for someone who could go with you from very first of the idea or someone for fixing your current project? I could do both. I am flexible, adaptable, trustworthy and patient. I also update myself newest technology regularly. Here are my list of skill: - Artificial Intelligence and Machine learning - Open AI and GPT Integration - Python solutions - Fullstack development - Web development - Database intergration - AutomationKotlin
AI DevelopmentAI App DevelopmentSoftware DevelopmentWordPressAWS DevelopmentAWS LambdaWeb DevelopmentAPI DevelopmentApple XcodeAngularSwiftiOSMobile App DevelopmentPHP - $22 hourly
- 4.8/5
- (9 jobs)
🏆 Upwork Top Rated Talent 2017 - 2022 | 🛡 Top Rated PLUS 2020-2022 🥇 Expert-Vetted professional since 2021, representing the TOP-1% of talent on Upwork ⚡ 10+ years in the IT | ⭐️ 100% Successfully completed jobs With 10+ years of experience in Android, I have worked on many applications: MyFiles, Gallery, PhotoEditor, Dating App, Rail-Hailing, Car Wash, Food Delivery, In-app purchases, Payment gateway, Android Auto applications, etc. Strong knowledge of Android 3rd party libraries: Retrofit, Glide, ButterKnife, RxJava, GSON, Retrolambda, Dagger, Koin, Hilt, Jetpack Compose, etc. Good at defining clear Android architecture codebase with MVC, MVP, Clean Architecture, Architecture Component, MVVM, etc. Master data structure and algorithm. Have many experiences with optimization: improving app performance, and analyzing memory issues. Working on Java, Kotlin, Flutter, and C++ Professional working style with a highly responsive, careful, and on-time attitude. I believe that with my knowledge and experience, I can help you to build a great and successful application.Kotlin
SmartphoneNative App DevelopmentPush NotificationsFlutterEnglish to Vietnamese TranslationAndroid SDKAPI IntegrationAndroidJavaAndroid App DevelopmentFirebase - $40 hourly
- 0.0/5
- (0 jobs)
Hello, I have 5 years of experience in IT industry. As a software engineer, I can create projects using the following: • C++ (5 years) • C# (5 years) • Swift (4 years) • Kotlin (2 years) Interests: • Game development • Mobile App development • Desktop App development • Machine Learning, Image processing, AI If you are looking for high quality, low price, fast delivery, please get in touch. Regards, Tran.Kotlin
Game DevelopmentGame DesignUnityiOS DevelopmentMobile App DevelopmentC#PythonPHPAndroidSwiftC++ - $5 hourly
- 5.0/5
- (1 job)
I'm a android developer but i want to find a other job in my freetime such as writing or content, editor, vvKotlin
Android SmartphoneAndroid StudioAndroid SDKAndroid App DevelopmentJavaAndroid - $15 hourly
- 0.0/5
- (0 jobs)
Software Engineer with 5+ years of experience building and deploying enterprise applications. Skilled in Java, Spring Boot, and possess additional knowledge of JVM languages like Scala and Kotlin. Proven experience with Docker containerization and comfortable working in Linux environments.Kotlin
Spring FrameworkScalaSpring BootMicroserviceRESTful APIGitLinuxApache SparkApache HadoopJavaApache KafkaDocker - $20 hourly
- 0.0/5
- (0 jobs)
PROFESSIONAL SUMMARY * Overall 4+ years of experience in software development of Android platform * Overall 4+ years of extensive experience in Android Application and Android Automotive * Proficiency in programming languages: Java/Kotlin/C++ * Have experiences with Android Jetpack Library * Familiar with design patterns: MVP, MVVM * Have experiences with Navigation system * Capable using many software designs tools (Enterprise Architect) * Very familiar with source control management tools (GIT, SVN) * Have a lot time working in project uses change management tools as Jira, CodeBeamer * Strong knowledge with Agile/Scrum, A-spice projects process * Work well in both Windows and Linux (Ubuntu) operating systems * Strong analytical, problem solving, troubleshooting and debugging skills * Familiar with CI/CD tools: Gerrit, Jenkin, Gitlab, Coverity ToolKotlin
FirebaseAgile Software DevelopmentGitC++JavaAndroid - $10 hourly
- 0.0/5
- (0 jobs)
🚀 Transform Your Mobile App Vision into Reality 🚀 Expertise in React Native (⚛️), Flutter (🐦), Swift (📱), and Kotlin (🤖). Craft seamless, high-performing experiences on both iOS and Android. 📞 Invite me for a FREE 30-minute consultation and unlock your app's full potential! 📞 🏆 Why Choose Me? 🏆 🔸 Versatile Skillset: Master in cross-platform development with React Native, Flutter, native iOS (Swift), and Android (Kotlin). 🔸 Proven Track Record: Delivered successful mobile apps for startups and enterprises across diverse industries. 🔸 User-centric Focus: Prioritize UX to create intuitive interfaces and seamless interactions. 🔸 Results-driven: Delivering high-quality, scalable mobile apps aligned with your business goals. 🎯 Featured Services 🎯 🔸 Cross-Platform App Development: Efficient, cost-effective apps for iOS and Android using React Native ⚛️ & Flutter 🐦. 🔸 Native iOS App Development: Lightning-fast, visually stunning apps using Swift 📱. 🔸 Native Android App Development: Robust, feature-rich apps with Kotlin 🤖. 🔸 UI/UX Design: Intuitive, eye-catching interfaces boosting user engagement. 🔸 API Integration: Enhance functionality with third-party services. 🔸 Backend Development: Scalable and secure backend systems. 🔸 Performance Optimization: Ensure smooth operation on all devices. 🔸 Consultation and Support: Trusted partner throughout development and beyond. 🛠️ My Tech Stack 🛠️ 🔸 Cross-Platform: React Native, JavaScript, TypeScript, Flutter 🔸 iOS: Swift, SwiftUI, Combine 🔸 Android: Kotlin, Jetpack Compose, Coroutines 🔸 Backend: Firebase, Node.js, Django, GraphQL 🔸 UI/UX: Figma, Adobe XD 🔸 Version Control: Git, GitHub, GitLab 🔸 CI/CD: GitHub Actions, Fastlane, CircleCI 🔸 Cloud & DevOps: Docker, Kubernetes, AWS, GCP 🔸 Testing: Jest, Detox, XCTest, Espresso 🔸 AI & Machine Learning: TensorFlow, PyTorch 🔸 Blockchain Integration: Solidity, Ethereum 🔸 ...and many more depending on project requirements 🌟 Let's Get Started! 🌟 Don't settle for the ordinary. Let's create an extraordinary mobile app together. Contact me today and turn your app idea into a resounding success! ✨Kotlin
React NativeSwiftApple XcodeiOS DevelopmentiOSAndroid UI DesignAndroid App DevelopmentAndroidMobile App DevelopmentReactJava - $10 hourly
- 0.0/5
- (0 jobs)
I am an Android developer with a strong passion for creating innovative and user-friendly applications. My expertise includes Kotlin, Jetpack Compose, Firebase, and Realm Database. With a keen eye for detail and a commitment to delivering high-quality code, I strive to build efficient and effective solutions that enhance user experiences. Whether it’s developing seamless user interfaces with Jetpack Compose, integrating robust backend services using Firebase, or managing data efficiently with Realm Database, I am dedicated to leveraging my skills to bring ideas to life. I am always eager to learn and adapt to new technologies, continuously expanding my knowledge and capabilities in the dynamic field of Android development.Kotlin
Realm DatabaseFirebaseJetPackAndroid - $20 hourly
- 0.0/5
- (0 jobs)
I have been working in information technology for more than 11 years . I have shown myself to be self-motivated, committed and determined in achieving my goals, that is to give solution and solve hard problems. I have also demonstrated teamwork and problems solving skills, a firm sense of responsibility and my capacity to work hard under pressure.Kotlin
RxSwiftRealm DatabaseClean ArchitectureRxJavaSwiftUISwiftJetPackFlutterMobile AppiOS DevelopmentAndroid App Development - $40 hourly
- 0.0/5
- (1 job)
I'm a backend developer with extensive experience with Node.js, PHP, MySQL. Looking forward to hearing from you.Kotlin
MySQL ProgrammingTerraformNode.jsDockerSpring BootJavaGolang - $25 hourly
- 0.0/5
- (0 jobs)
Hello! I am Duong, a passionate and skilled Mobile Developer specializing in crafting robust and user-friendly mobile applications. With a keen eye for detail and a commitment to excellence, I transform ideas into seamless mobile experiences that captivate and engage users. 📱 Android Development: With extensive experience in Android development, I bring your app ideas to life on the world's most popular mobile platform. My expertise in Java and Kotlin ensures high-performance, scalable, and maintainable code, delivering apps that stand out in the Google Play Store. 🔄 Kotlin Expertise: Kotlin, with its modern and expressive syntax, is my language of choice for Android development. I leverage Kotlin's powerful features to write clean, efficient, and reliable code, enhancing app performance and reducing development time. 🌟 Flutter Development: Harnessing the power of Flutter, I create cross-platform apps that deliver native performance and beautiful UIs. Whether you need an app for Android, iOS, or both, I ensure a consistent and delightful user experience across all devices. 🎓 Education & Continuous Learning: I hold a degree in Computer Science, and I continuously update my skills to stay ahead in the rapidly evolving mobile development landscape. My commitment to learning ensures I am always equipped with the latest tools and techniques. 🛠️ Technical Proficiencies: Android: Java, Kotlin Flutter: Dart Tools: Android Studio, Firebase, Git, RESTful APIs 🔍 Attention to Detail & Quality: My development philosophy centers on delivering apps that are not only functional but also polished and bug-free. I rigorously test every app to ensure it meets the highest standards of quality and performance. 🤝 Collaborative & Client-Focused: I believe in building strong relationships with clients, understanding their vision, and working collaboratively to bring it to life. Your project's success is my priority, and I am dedicated to providing solutions that exceed your expectations. Let's work together to create outstanding mobile applications that make a difference. Whether you're looking to build a new app from scratch or enhance an existing one, I am here to deliver with expertise, creativity, and a commitment to excellence. 🌐📲 Feel free to adjust any details to better match your personal experiences and accomplishments!Kotlin
POS Terminal DevelopmentPayment PluginEnglishProblem SolvingBug FixMobile AppFlutterDartAndroid App Development - $30 hourly
- 0.0/5
- (0 jobs)
I am a qualified and professional Mobile Developer with nearly 4 years of experience in front-end development, specializing in Android applications. My strong creative and analytical skills enable me to solve complex problems under pressure and adapt quickly to new environments. Known for bringing positivity and humor to the workplace, I contribute to a collaborative and joyful atmosphere. I have extensive experience working with modern Android development tools and technologies, including Android Jetpack libraries (Paging, Hilt, Navigation, RoomDatabase, and WorkManager), and I am skilled in implementing MVC, MVVM, and MVI architectural patterns. My expertise includes multi-threaded processing using Java/Kotlin, custom views, and UI optimization, as well as writing unit tests to ensure code reliability. I am also proficient in RESTful API integration, JSON handling, and version control using Git. With hands-on experience in Firebase and Google Cloud services such as Firestore, Authentication, and Dynamic Links, I bring specialized knowledge in application performance improvement and Android security best practices, including Biometric Authentication, SafetyNet API, and SSL Pinning. Additionally, I have worked with third-party libraries like PhotoEditor and MpChart and am experienced in Scrum/Agile methodologies for team collaboration. My passion for learning new technologies and my readiness to take on challenging projects make me a great fit for innovative companies. I look forward to contributing my skills to deliver impactful mobile solutions.Kotlin
Payment FunctionalityJiraAgile Software DevelopmentTrelloSecurity ApplianceClean ArchitectureFirebaseRoomRESTful APIUI/UX PrototypingAndroid App DevelopmentGitLabGitHubScheduling - $25 hourly
- 0.0/5
- (0 jobs)
Hi everybody, I am a developer App(Android & IOS), HTML5, CSS3, Bootstrap, Ajax, Jquery, Javascript, java, kotlin, flutter, Swift developer, with strong experience over 4 years. =============== A. My Services =============== > App(Android (java or kotlin) & IOS (Swift), flutter) > Framework (MVC) > App/Web development from your ideas > Decompile android code from apk > Develop apps from figma > Application administration on google play and appstore platforms ============== B. Why choose me? ============== - 100% clean code. - supports all browsers. - supports all mobile, iPhone, iPad, laptop, desktop. - 100% pixel perfect. - Over 4 years of experience - 100% Client Satisfaction - Fast turnaround time (time frame maintain 100%). - Excellent customer and technical support.Kotlin
Google APIsGoogle PlayCore JavaRESTful APIMobile App Development ConsultationQR & Barcode ScanneriOS DevelopmentSwiftFlutterMobile App DevelopmentJava - $30 hourly
- 0.0/5
- (0 jobs)
I’m a developer experienced in building Al & Machine Learning model and familiar in deploy them to mobile device, such as image processing or audio processing. - Knows Python, tensorflow, pytorch, etc. in machine learning - Knows Flutter, Swift, kotlin, C++, Java in mobile developingKotlin
Image ProcessingSwiftFlutterC++Machine LearningAI Image GenerationAI BuilderAI Image EditingJavaPython - $10 hourly
- 0.0/5
- (0 jobs)
Doan Viet Quang Software Engineer *Short-term goal: striving for an internship position in a professional workforce, to learn and gain experience from professional individuals *Long-term goal: to become an outstanding software engineer, to become an effective and productive member of the companyKotlin
NFCQR & Barcode ScannerSQLiteRetrofitAPI IntegrationAndroidNative App Development Want to browse more freelancers?
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