Hire the Best Android App Developers
in Vietnam

✅ TOP RATED PLUS (Top 3% Freelancer) Developer on Upwork, specializing in Mobile (Android native/Flutter). A pioneering and security-oriented developer offering more than 14 years of experience designing, implementing, integrating, testing and supporting impactful applications developed in diverse, collaborative environments for mobile and tablet devices on the mobile platform. WHY CHOOSE ME? ✅ 14+ Years of experience in Mobile Development ✅ 50 Finished Projects on Upwork, 100% Job Success ✅ 99% Clients who would recommend ⚡️ROCKSTAR IN: — Native Android/IOS Development — Hybrid Mobile Development - Flutter/React Native — Rust/NodeJS Backend Development ✅ Career Highlights - Developed numerous intuitive, visually engaging, and high-performance mobile applications that prioritize user experience and functionality. - Recognized for writing clean, efficient, secure, and reusable code, with a strong focus on privacy and data security. - Skilled in object-oriented design, data structures, problem-solving, performance optimization, and advanced debugging techniques. - Deep expertise in handling device compatibility and cross-version behavior across the mobile ecosystem. - Known as a self-driven, organized, and reliable developer who consistently meets deadlines and delivers quality work. - Provided technical leadership and mentorship to junior developers, helping elevate team performance. - Active contributor to the developer community with over 8,200 reputation points on Stack Overflow. 💬REVIEWS FROM CLIENTS: ⭐⭐⭐⭐⭐ "Phuoc Doan Hong is a true expert. His Kotlin knowledge and Android development experience are really valuable. I highly recommend this guy." ⭐⭐⭐⭐⭐ "He was an expert, in every move he made. Knowledgeable, patient and easy to communicate with. You can blindly trust him. Thanks again" ⭐⭐⭐⭐⭐ "Doan is highly skilled, smart, and works hard to find the best solution for complex problems. He has deep understanding of performance considerations in the Android platform. An Android expert. His English is excellent, and communication is great." ⭐⭐⭐⭐⭐ "I can simply say that I am very happy to work with him. He is very responsible, hardworking, and talented developer with great communication skills. He understood all the problems and delivered clear solutions. His skills and his professionalism are very high level. I am sure we will be working on new projects with him. Thanks for this amazing work!" Below you will find client reviews section, it describes the quality of work and value that you can expect from working with me

I specialize in Kotlin/Java development with a strong focus on Android and Kotlin Multiplatform (KMP). I build scalable, maintainable, and high-performance applications using modern architectures and best practices. Key Skills & Expertise: - UI Development: Jetpack Compose, Custom Views - Architectures: Clean Architecture, MVVM, MVP, MVC, MVI - Dependency Injection: Dagger 2, Hilt - Networking: REST APIs (JSON, XML, Retrofit/OkHttp) - Social Media Integration: Facebook, Google - In-App Monetization: In-App Billing, Google AdMob - Database Management: SQLite, Room Database - Asynchronous Programming: Coroutines/Flow, RxJava2 - Multiplatform Development: Kotlin Multiplatform (KMP) - Multimedia & Media Player Integration - Version Control: Git - Other Tools & Libraries: A wide range of libraries to optimize app performance 🚀 Let’s Build Something Great! I’m open to discussing your project to see how my skills can bring your ideas to life. Contact me, and let’s make your app a success!

I have 5 years+ of experiences developing mobile apps. I have worked in FPT Software with many well-known clients such as Boeing, Canon, Softbank, P.S Solution. I’m currently working with Canadian customers. 📱App I made from scratch * Cantec Courier * Cantec Driver 🧑‍💻 IOS Skills * Swift / SwiftUI / RxSwift * MVC / MVP / MVVM / VIPER * Push Notifications * Bluetooth (BLE) * Core Locations * Localization * REST API (JSON, XML) * App submission/ Testflight 📦 Database: * Realm * Core Data * MySQL 🛠 Integrations * Facebook, Instagram, Google Firebase, Dropbox * Google maps, Mapbox * Amazon Web Service (Amplify, S3, SNS, DynamoDB, Cognito…etc) * Fastlane 📊 Workflows: * Github, Gitlab, Bitbucket * Trello, Jira

🔥 Senior Full Stack Developer | React | Next | Node.js Developer | AWS Developer | JavaScript | TypeScript 👋I’m Phuong, With 5+ years of experience across full-stack development, I specialize in building high-performance web apps, SaaS products, and MVPs using modern JavaScript/TypeScript technologies, cloud services, and best practices. I don’t just write code — I solve problems. I care about how your product performs, how your users experience it, and how fast we can get your idea to market. From backend architecture to frontend performance, I build with purpose — so you get clean, efficient systems that just work. 💻 Tech Stack & Specialties ✅Frontend: Next.js 15, React.js, TypeScript, Tailwind CSS, Material UI, ShadcnUI, ChakraUI, Zustand, React Hook Form, React Query, Zod, Tanstack Table ✅Backend & APIs: Node.js, NestJS, Express.js, Python, Fast API, Hono, Java Spring Boot ✅ORM & Databases: Prisma ORM, Drizzle ORM, PostgreSQL, MySQL, MongoDB, Redis, AWS RDS, AWS Aurora, DynamoDB, Convex ✅Cloud & DevOps: AWS (EC2, Lambda, ECS, Beanstalk, S3, Cognito, MQTT), Vercel, DigitalOcean, Supabase, Neon, Railway, Render ✅Architecture & Infra: Microservices, Serverless, CQRS, WebSockets, Background Jobs, Cron Jobs, Kafka, RabbitMQ, BullMQ ✅AI & Automation: OpenAI, ElevenLabs, Replicate, Remotion (Video), Trigger.dev, Inngest ✅Integrations: Stripe, Lemon Squeezy, Paddle, MakerKit, PayloadCMS, Strapi 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬 𝐈 𝐒𝐞𝐫𝐯𝐞: ▫ EdTech ▫ Healthcare ▫ Fitness & Wellness ▫ Sports ▫ FinTech ▫ Travel & Hospitality ▫ Entertainment & Media ▫ Furniture & Home Living 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 𝐈 𝐏𝐫𝐨𝐯𝐢𝐝𝐞: ▫ Custom Full Stack Web Applications (Next.js / Node.js) ▫ Scalable API Development & Integration (REST, GraphQL) ▫ Cloud-Based Solutions (AWS & Supabase) ▫ Real-Time Data Processing & Backend Services ▫ Mobile-Responsive Web Development ▫ JavaScript / TypeScript Web Apps ▫ Database Architecture & Development (PostgreSQL, Supabase) ▫ Business Process & Workflow Automation ▫ Web Scraping Bots & Data Extraction Tools 💬 Ready to Build? Whether you're launching your startup or scaling your product, I bring 5+ years of hands-on experience, battle-tested workflows, and startup-ready agility. Let’s bring your idea to life—send me a message and let’s talk today! Other Skill: Full Stack Developer, Full Stack App Developer, Full Stack Web Developer, Full Stack Software Developer, Full Stack Software Engineer, Full Stack Freelance Developer, Full Stack Senior Web Developer, Experienced Full Stack Developer, Professional Full Stack Developer, Senior Full Stack Developer, Best Full Stack Developer on Upwork, Upwork Full Stack Developer, Top Rated Upwork Full Stack Developer, Top Rated Upwork Developer, Software Engineer, Senior Software Engineer, Software Development Engineer, Web App Developer, Website Developer, App Developer, Mobile App Developer, Android App Developer, iOS App Developer, iOS Development, Expert Full Stack iOS Developer, React Native Developer, React Native Mobile App Developer, Expert React Native Developer, React Native Full-Stack Developer, Upwork App Developer, Back End Developer, Back End Development, Backend Developer, Full-Stack RESTful API Development, Full-Stack Node.js Development, Full-Stack Express.js Development, Node.js Developer, Node Expert, Express.js, REST API, RESTful API, RESTful APIs, API, API Integration, API Gateway, API Development, Swagger, Postman, Insomnia, GraphQL, GraphQL Subscriptions, Apollo Client, Apollo Server, Auth0, OAuth 2.0, JSON Web Tokens (JWT), tRPC, Clerk, Amazon Web Services, AWS, AWS Services Mastery, AWS Cloud, AWS CloudTrail, AWS CloudFormation, AWS CloudFront, AWS S3, AWS EC2, AWS RDS, AWS Aurora, AWS Cognito, AWS Lambda, AWS AppSync, AWS CodePipeline, AWS CodeBuild, AWS CodeDeploy, AWS CodeCommit, AWS Elasticsearch, AWS ElasticCache, AWS Glue, AWS MediaTailor, AWS DynamoDB, AWS Fargate, AWS API, AWS Application, AWS Upgrade, AWS Setup, AWS Systems Manager, AWS Systems Engineer, AWS Database, AWS Data Stack, AWS DevOps Engineer, AWS Certified Developer, AWS Certified Solutions Architect, AWS Certified Data Engineer, AWS Certified Pro, AWS Certified DevOps Engineer, AWS Cloud Club, AWS DevOps Support, AWS DevOps Specialist

🥇 Expert-Vetted professional since 2021, representing the TOP-1% of talent on Upwork 🏆 Upwork Top Rated Talent 2017 - 2022 | 🛡 Top Rated PLUS 2020-2022 ⚡ 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.