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I will create smooth, high performance apps
Do Trung Dung
About this gig
Senior Mobile Developer | iOS | React Native | Flutter | 10+ Years
Hi, Im Dung a mobile developer with 10+ years of experience building high-quality, scalable, and user-friendly apps.
Expertise:
- iOS (Swift, Objective-C) since 2013
- React Native (6+ years)
- Flutter & Android (Java, Kotlin)
- Clean, maintainable, scalable code
- Performance optimization & smooth UI/UX
I can help you:
- Build apps from scratch (iOS / Android / Cross-platform)
- Convert Figma/Sketch designs into pixel-perfect apps
- Fix bugs & improve performance
- Upgrade or refactor existing apps
- Create modern UI with smooth animations
Why choose me:
- Fast, reliable delivery
- Clear communication
- Strong problem-solving skills
- Focus on real business value
If you need a developer who can turn your idea into a high-quality mobile app, let's connect. Im ready to start your project today!
Get to know Do Trung Dung
Do Trung Dung
Mobile Developer
- FromVietnam
- Member sinceJun 2017
Languages
English, Vietnamese
🚀 Senior Mobile Developer | iOS | React Native | Flutter
Hi, I’m Dung — a mobile developer with 10+ years of experience. I started iOS in 2013 (Swift, Objective-C) and since 2018 have built high-performance cross-platform apps with React Native. I also work with Flutter and Android (Java/Kotlin).
I deliver clean, scalable code, smooth UI/UX, and fast, reliable results. Experienced in building apps from scratch, fixing bugs, optimizing performance, and turning Figma designs into pixel-perfect products.
Let’s turn your idea into a high-quality app — message me to get started!
My Portfolio
FAQ
❓ What information do you need to start?
I need your app idea, features list, preferred platform (iOS/Android), and design files (Figma/Sketch) if available.
❓ Can you build both iOS and Android apps?
Yes, I develop both native and cross-platform apps using Swift, React Native, and Flutter.
❓ Do you provide UI/UX design?
Yes, I can design modern, user-friendly interfaces or convert your existing designs into pixel-perfect apps.
❓ Will you provide the source code?
Yes, you will receive clean, well-structured, and fully documented source code.
❓ Can you fix bugs or improve my existing app?
Absolutely. I can debug, optimize performance, and refactor your app for better scalability.
❓ Do you help with App Store / Google Play submission?
Yes, I can assist with building, testing, and submitting your app to both stores.
❓ How long does it take to build an app?
It depends on complexity. Simple apps take a few days, while full apps may take a few weeks.
❓ Do you offer support after delivery?
Yes, I provide post-delivery support and can offer ongoing maintenance if needed.
❓ Can you work with my backend/API?
Yes, I can integrate any REST API or work with your existing backend system.
❓ Why should I choose you?
With 10+ years of experience in mobile app development, I deliver high-performance, scalable, and user-friendly apps with fast communication and reliable delivery.
