Hire the Best Backend Rest API Freelancers
in Vietnam

Hello, are you looking for a react native developer? I'm a React Native developer come from Vietnam. I have strong skills developing mobile apps and have 3+ years of general experience. As a React Native developer, I specialize in building high-quality, cross-platform mobile applications using the React Native framework. I have done more projects on logictics, e-commerce, news, travel, and management apps. Most of the apps I have developed from scratch/figma, so I know how to design application architecture and write clean code. In addition, I have maintained legacy code. Interested in a challenging technical track career in an application development environment. I have a strong foundation and highly experienced in: ✅ React Native ✅ Redux/Redux Saga ✅ Firebase: Auth/Realtime Database/Firestore/Cloud Functions/Push Notifications/Analytics/Remote Config ✅ WebSocket ✅ Xcode/Android Studio ✅ Github/Gitlab ✅ Jira/Trello/ Microsoft Azure ✅ Postman/Swagger/Heroku ✅ Photoshop/XD/Sketch/Figma ✅ JavaScript/TypeScript ✅ React Native's core components and APIs to create custom UI components and integrate third-party libraries or SDKs, then hook them up with backend endpoints. ✅ Good skills and knowledge on UI/UX. ✅ Always research to have the depth knowledge for optimizing and marking high performance app. ✅ Using clean architecture and MVP/MVC/MVVM for project. ✅ Configuring app distribution using Diawi (Test), TestFlight (Staging) and Apple Developer (Production). ✅ Rest API with NodeJS/ExpressJs ✅ MongoDB/MySQL/PostgreSQL/Firebase database. ✅ Deploy to the production environment on AppStore and GooglePlay. ✅ Ongoing small changes, consultation, analytics, and guidance. I am also familiar with modern software development practices, such as agile methodology and version control, which are essential for building complex mobile applications. I also have experience with state management, navigation, and other essential aspects of React Native development. As a freelancer, I bring a wealth of experience to every project I undertake. I am adept at working independently or team work, managing my time effectively, and collaborating with clients to ensure that their specific needs are met. In addition, I am committed to staying up-to-date with the latest industry trends and best practices, which allows me to deliver the most innovative and efficient solutions to my clients. I live in ICT timezone (UTC+7) but I am pretty flexible to adjust to different time zones (AU/ EU/ US markets) to accommodate client's needs. On top of it, I always keep my clients updated via daily reports so that they easily keep track of progress. I am available to send report via e-mails and in messengers for anything urgent. I look forward to discussing your project with you.

🏆 TOP-RATED (TOP 10% on Upwork) |💭 Looking for a tech partner to bring your vision to life? Whether you're launching a startup, scaling an existing business, or pivoting your current venture - I’m here to help you succeed. 🔍 What I Can Help You With: 🚀 MVP Development: Build and launch MVPs in record time, so you can test the market and monetize quickly. 🚀 Full-Stack Development: Seamless front-end and back-end solutions designed for performance, scalability, and maintainability. 🚀 Custom Cloud Solutions: Thoughtfully designed architectures that are cost-effective from day one and scale seamlessly with your growth. 🚀 AI-Powered Tools: Enhance your business operations with intelligent chatbots, recommendation engines, or sales tools. 🚀 Reliable Data Pipelines: Automate data aggregation with robust pipelines that seamlessly integrate APIs, scrapers, and data feeds for real-time updates. 🚀 Technical Leadership: End-to-end project guidance, from inception to operating successfully in production during peak times. 👨‍💻 Tech I Work With: 💻 Backend / Front end / Full-Stack Development: ✔️ Java (Spring / Quarkus) / Python (Flask) / Node.js / Express.js ✔️ PostgreSQL / MSSQL / ORACLE ✔️ React / Angular / JavaScript / TypeScript ✔️ HTML / CSS / Tailwind / Ant Design ☁️ AWS Cloud: ✔️ Serverless / Lambda / Step Functions / API Gateway / S3 / DynamoDB / SNS / SQS / etc 🚀 Infrastructure as code & CI/CD: ✔️ AWS CDK / OKD / Serverless framework ✔️ GitHub Actions / GitLab CI/CD What Clients Say About Me: ⭐️⭐️⭐️⭐️⭐️ "Thanh is a nice person to work with! We implemented a lot of functionality in open source library. Some tasks were really hard to implement. I recommend Thanh as experienced java developer." ⭐️⭐️⭐️⭐️⭐️"Thanh did a wonderful job on our project, would not hesitate to work with again." ⭐️⭐️⭐️⭐️⭐️ "He is best freelancer i have met to work on Java" 🚀 Let’s Build Your Next Big Thing! 📊 I believe that thoughtfully designed solutions should be both cost-effective and scalable. With a decade of experience in software architecture and technical leadership, I ensure your projects are built to succeed—so you can focus on what truly matters: your business. 💼 Ready to partner? Message me today, and let’s get started!

For now, I am working as a full-time freelancer as I am a senior full-stack developer who has extensive knowledge of the most advanced web technologies. I have rich experience in building content management systems on EPI Server CMS, Epi Server E-commerce, Umbraco, M-Files, CRM D365 Microsoft, SharePoint On-Premises & Online, Shopping carts, PIM, and many APIs including Amazon Web Services and Azure development along with more than 10 years of experience in Node.js, C#, Ruby, Python, PHP development, and React.js, Next.js, Vue.js, Angular front-end application development, and mobile programming: React Native, Flutter My responsibility I accelerate your digital transformation About me I am reliable, highly responsive to your needs, and equipped with a quality delivery mindset. Why choose me I align technical solutions with your business strategy by innovating and transforming your business to the next level Long-term Engagement I build trust and confidence by delivering what I promise – the first time and every time. Confidentiality I work under a strict Non-Disclosure Agreement (NDA). I take confidentiality very seriously. Flexible Pricing Options You can hire me on an hourly, monthly basis or fixed budget by projects. My services I offer custom build, end-to-end solutions to solve your business problems. Whether you are an individual, entrepreneur, startup, or company looking to build products or expand your team, I have got you covered. Web Development, System Integration, E-Commerce Solutions, Support & Maintenance 24/7, Mobile Development and Dedicated Teams Technologies Experts in eCommerce & CMS platforms: Sitecore, Sitecore E-Commerce, EPiServer E-Commerce and Umbraco E-Commerce. Strong in building solutions on Microsoft platforms: CRM Dynamic Microsoft, Azure Cloud Programming and support full CI/CD, building pipeline on Azure DevOps and AWS services. - CMS development (Umbraco, EPiServer, Optimizely CMS, WordPress and Sitecore) and SharePoint Online - Strong at Front-end languages: Reacts, NextJs, VueJs, Angular - Strong at Back-end languages: Node.js, C#, Ruby, Python, PHP - Mobile: React Native, Flutter, Swift and IOS Android Native - MySQL, MongoDB, Postgres - Visual Basic, WinForms application and DevExpress framework

I’m a backend developer with a passion for Docker and serverless technologies. I use AWS, TypeScript, Python, CI/CD and Stripe payment to create scalable and secure web applications. I have a strong background in database development with SQL and NoSQL. I enjoy working in a team environment and delivering high-quality solutions to customers.

Senior Backend Engineer | APIs, PostgreSQL, Microservices Top Rated | 100% Job Success | $10K+ earned I help teams build and evolve backend products—from shipping new features to maintaining existing systems and integrating third-party APIs. I can take ownership of an existing codebase quickly and safely. What I can help you with Build/extend REST / GraphQL / gRPC APIs Product feature development (end-to-end backend implementation) Maintenance & bug fixing (root-cause analysis, safe refactors, tests) Database work: PostgreSQL/MySQL schema design, migrations, query optimization Integrations: auth (JWT/OAuth), webhooks, payments, external services, data sync Performance & reliability: caching (Redis), concurrency, error handling, rate limiting How I work Clarify scope + success criteria first Deliver in small milestones with frequent updates Clean code, practical tests, and clear handover notes Availability: 20–40 hrs/week, flexible Send me your product goals or current backend issues—I'll propose a clear plan and next steps.

⭐️ Hi there! My name is Qang. I'm a web developer with seven years of experience. I'm flexible and responsive. I work primarily as a back-end developer, but I have enough experience to work solo as a full-stack developer. Python is my choice for the back-end. I use mainly Flask and FastAPI frameworks, and I'm also familiar with the Django framework. My recent technology stack: ✅ Languages: Python, Javascript. ✅ Databases: Postgresql, MySQL, Mongodb. ✅ Server: Nginx. ✅ Frameworks/Libraries: FastAPI, Flask, Django, ReactJS, JQuery. ✅ Version Control: Git, Github, GitLab, Bitbucket. ✅ Others: Docker, Bash/Shell scripts, SSH, Digital Ocean, AWS (EC2) I hope you consider me to be part of your projects. 🥂