Copyright © 2026 Dzung. All rights reserved.
Hi, I'm Dzung!
Senior iOS Developer React Native Developer Mobile Expert
Based in Ha Noi
I'm a Senior Mobile Developer with 10+ years of professional experience. I deliver high-quality mobile applications across all platforms with expertise in Firebase, AWS, and cutting-edge technologies.
🚀 Expert In
📱 iOS
🤖 Android
⚛️ React Native
💙 Flutter
🔶 Swift
🔷 Objective-C
🟣 Kotlin
☕ Java
- Nice to meet you!
Do Trung Dung
Senior iOS Developer React Native Expert Tech LeadHello there! My name is Đỗ Trung Dũng. I am a Senior Mobile Developer with over 10 years of professional experience, passionate and dedicated to delivering exceptional mobile solutions.
I master the complete mobile development ecosystem, enabling me to build native and cross-platform apps that perform flawlessly on any device.
📲 Platform Expertise
📱 iOS Native
🤖 Android Native
⚛️ React Native
💙 Flutter
💻 Programming Languages
🔶 Swift
🔷 Objective-C
🟣 Kotlin
☕ Java
Beyond coding, I design application interfaces using Figma and Sketch. I communicate effectively with international clients and have strong problem-solving skills.
- Age 32
- Born In Ha Noi, Viet Nam
- Mail dungdt.iosdeveloper@gmail.com
- Phone +8484 555 3 222
-
10+
Years of Experience -
16+
Projects Delivered -
6
Companies Served
- Experience
10+ Years of Mobile Excellence
-
-2025 - PresentSenior Mobile Developer & Technical Consultant
-Nha Pho Viet Nam (Freelance)Leading mobile architecture with React Native, Swift, and Kotlin for enterprise solutions.
As a Technical Consultant at NhaPho Groups, I provide end-to-end mobile solutions for their real estate platform serving thousands of users across Vietnam.
In today’s digital world, your website is the first interaction consumers have with your business. That's why almost 95 percent of a user’s first impression relates to web design. It’s also why web design services can have an immense impact on your company’s bottom line.
That’s why more companies are not only reevaluating their website’s design but also partnering with Elisc, the web design agency that’s driven more than $2.4 billion in revenue for its clients. With over 50 web design awards under our belt, we're confident we can design a custom website that drives sales for your unique business.
-
-2020 - 2024Senior Mobile Developer
-ITEAL Viet NamLeading mobile architecture with React Native, Swift, and Kotlin for enterprise solutions.
As a Technical Consultant at NhaPho Groups, I provide end-to-end mobile solutions for their real estate platform serving thousands of users across Vietnam.
In today’s digital world, your website is the first interaction consumers have with your business. That's why almost 95 percent of a user’s first impression relates to web design. It’s also why web design services can have an immense impact on your company’s bottom line.
That’s why more companies are not only reevaluating their website’s design but also partnering with Elisc, the web design agency that’s driven more than $2.4 billion in revenue for its clients. With over 50 web design awards under our belt, we're confident we can design a custom website that drives sales for your unique business.
-
-2019 - 2020Senior iOS Developer & SDK Architect
-Tripi (Technology Trade & Tourism JSC)Leading mobile architecture with React Native, Swift, and Kotlin for enterprise solutions.
As a Technical Consultant at NhaPho Groups, I provide end-to-end mobile solutions for their real estate platform serving thousands of users across Vietnam.
In today’s digital world, your website is the first interaction consumers have with your business. That's why almost 95 percent of a user’s first impression relates to web design. It’s also why web design services can have an immense impact on your company’s bottom line.
That’s why more companies are not only reevaluating their website’s design but also partnering with Elisc, the web design agency that’s driven more than $2.4 billion in revenue for its clients. With over 50 web design awards under our belt, we're confident we can design a custom website that drives sales for your unique business.
-
-2014 - 2019Senior Mobile Developer (5 Years)
-Simble VietnamLeading mobile architecture with React Native, Swift, and Kotlin for enterprise solutions.
As a Technical Consultant at NhaPho Groups, I provide end-to-end mobile solutions for their real estate platform serving thousands of users across Vietnam.
In today’s digital world, your website is the first interaction consumers have with your business. That's why almost 95 percent of a user’s first impression relates to web design. It’s also why web design services can have an immense impact on your company’s bottom line.
That’s why more companies are not only reevaluating their website’s design but also partnering with Elisc, the web design agency that’s driven more than $2.4 billion in revenue for its clients. With over 50 web design awards under our belt, we're confident we can design a custom website that drives sales for your unique business.
- Services
dungdt.iosdeveloper@gmail.com
What I Offer
🛠️ Technologies I Work With
📱 iOS
🤖 Android
⚛️ React Native
💙 Flutter
🔶 Swift
🔷 Objective-C
🟣 Kotlin
☕ Java
Firebase • AWS • RESTful APIs • Socket.IO • GraphQL • CI/CD • Git • Figma • Sketch
-
01📱 iOS & Android Development
Native app development using Swift, Objective-C for iOS and Kotlin, Java for Android with optimal performance
I offer comprehensive technical support for all aspects of the mobile development process, including setting up the development environment and guiding you through the app submission process to app stores. With my extensive experience in mobile development, I can assist you in configuring and setting up your development environment, ensuring that all the necessary tools and libraries are properly installed and configured for smooth development workflow. Furthermore, I can provide guidance on the app submission process, helping you navigate the complexities and requirements of various app stores. From preparing the necessary assets and metadata to ensuring compliance with guidelines and resolving any potential issues, I will support you in every step of the submission process to maximize your chances of successful app publication. I stay up-to-date with the latest industry standards and best practices in mobile development, enabling me to offer tailored solutions to optimize your app's performance, enhance user experience, and address any technical challenges that may arise. Whether you need assistance with resolving dependencies, optimizing build configurations, improving app performance, or handling any other technical issue that arises during mobile development, I am here to provide dedicated support and expertise. Rest assured that I will work closely with you, providing clear and concise explanations, troubleshooting assistance, and actionable recommendations to ensure a smooth and efficient development journey. If you require any technical support or have questions regarding mobile development, such as environment setup, app submission, or any other technical challenge, please don't hesitate to reach out to me. I am committed to supporting you throughout the entire mobile development process -
02🐛 Bug Fixing & Maintenance
I am dedicated to delivering professional bug-fixing services promptly and with outstanding quality.
I specialize in delivering comprehensive bug-fixing services that are characterized by the utmost dedication to resolving any issues you may encounter. With a strong emphasis on efficiency, I am committed to promptly identifying and rectifying bugs with the highest level of quality. When you entrust me with your bug-fixing needs, you can expect a meticulous approach that encompasses thorough debugging, meticulous error analysis, and the implementation of robust solutions. I leverage my extensive technical knowledge and experience to swiftly diagnose and address the root cause of any issues, ensuring that your application operates seamlessly. Furthermore, my commitment to delivering a superior user experience is reflected in my emphasis on not only fixing bugs but also optimizing overall performance. I work diligently to ensure that your application functions flawlessly, enhancing its stability, responsiveness, and overall quality. Rest assured that I maintain a proactive approach throughout the bug-fixing process, striving to exceed your expectations by delivering timely resolutions. I value open communication and collaboration, keeping you informed at every step and seeking your input to ensure the final outcome aligns with your requirements and vision. By engaging my bug-fixing services, you can confidently navigate through any technical obstacles and deliver a polished and reliable application to your users. -
03⚛️ Cross-Platform Development
Building apps with React Native and Flutter that run seamlessly on both iOS and Android
I am dedicated to delivering an exceptional application that aligns with your vision. With my team of skilled professionals, I prioritize your ideas and work closely with you throughout the development process. By employing cutting-edge technologies and adhering to rigorous quality standards, I create a user-friendly and visually appealing application. Effective communication and transparent collaboration are essential to ensure your satisfaction. Trust me to bring your vision to life and make a significant impact in today's digital landscape.
- Portfolio
My Professional Journey
16+
Projects Delivered
10+
Years Experience
6
Companies Served
50+
Happy Clients
-
Real Estate Platform - Comprehensive mobile app for Vietnam's leading real estate company with property search, listing management, and client-agent communication.
Key Features: Real-time video conferencing (AWS Chime), instant notifications, advanced search, virtual tours, integrated CRM.
Tech Stack: React Native, TypeScript, Firebase, AWS Chime, FCM, Deep Linking
- ClientNhaPho Groups
- Team8 developers
- Date2024 - Present
-
Enterprise Productivity App - Full-featured productivity and team collaboration platform for VIG Corporation with real-time communication capabilities.
Key Features: Video conferencing, task management, team chat, file sharing, calendar integration, push notifications.
Tech Stack: React Native, Firebase (Realtime DB, Firestore), AWS Chime, FCM, Deep Linking
- ClientVIG Corporation
- Team4 developers
- Date2022 - 2024
-
Property Management Solution - French condominium management app enabling residents and property managers to communicate, vote, and manage building operations.
Key Features: Multi-language support (French/English), voting system, document sharing, maintenance requests, financial reports.
Tech Stack: React Native, Firebase, AWS, RESTful APIs, FCM
- ClientSynple (France)
- Team4 developers
- Date2021 - 2022
-
Health & Wellness App - iOS application focused on senior care and wellness tracking with real-time health monitoring and caregiver communication.
Key Features: Health metrics tracking, medication reminders, caregiver alerts, activity logging, wellness reports.
Tech Stack: Swift, Objective-C, Firebase, AWS Chime, FCM, HealthKit integration
- ClientWelbi
- Team3 developers
- Date2020 - 2021
-
Travel Tech Platform - Real-time travel booking and communication platform for one of Vietnam's fastest-growing travel tech startups.
Key Features: Real-time booking updates, instant messaging, itinerary management, payment integration, push notifications.
Tech Stack: Swift, Objective-C, Socket.IO, FCM, RESTful APIs, Deep Linking
- ClientTripi Corporation
- Team6 developers
- Date2019 - 2020
-
Modular SDK Architecture - Designed and built reusable SDK components enabling rapid feature deployment across multiple Tripi applications.
Key Features: Modular architecture, easy integration, comprehensive documentation, automated testing, CI/CD pipeline.
Tech Stack: Swift, Objective-C, Socket.IO, FCM, RESTful APIs
- ClientTripi Corporation
- Team6 developers
- Date2019 - 2020
-
Enterprise IoT Suite - Series of energy monitoring and smart home automation applications for enterprise clients with real-time analytics.
Key Features: Real-time energy monitoring, IoT device control, usage analytics, cost optimization, automated alerts.
Tech Stack: Swift, Objective-C, React Native, Socket.IO, AWS, Apple Wallet, IAP, Google Pay
- ClientSimble Solutions
- Team8 developers
- Date2018 - 2019
-
Job Marketplace Platform - Mobile job search and recruitment platform with integrated payment processing and employer-candidate matching.
Key Features: Smart job matching, in-app applications, Apple Wallet integration, in-app purchases, real-time notifications.
Tech Stack: Swift, Objective-C, Socket.IO, AWS, Apple Wallet, In-App Purchase
- ClientIncipient IT
- Team4 developers
- Date2018
-
Business Forms Application - Cross-platform digital forms solution for enterprise data collection with offline support and cloud sync.
Key Features: Dynamic form builder, offline mode, cloud synchronization, Google Pay integration, data export.
Tech Stack: React Native, Objective-C, Socket.IO, AWS, Google Pay, IAP
- ClientIncipient IT
- Team2 developers
- Date2018 - 2019
-
AR Entertainment Apps - Innovative entertainment applications featuring augmented reality with OpenCV face detection and real-time image processing.
Key Features: Face detection, AR filters, real-time image processing, social sharing, in-app purchases.
Tech Stack: Swift, Objective-C, OpenCV, Face Detector, Socket.IO, Apple Wallet, IAP
- ClientIncipient IT
- Team4 developers
- Date2017 - 2018
-
Family Safety Applications - Child safety and parental control apps with real-time GPS tracking, geofencing, and emergency alerts.
Key Features: Real-time GPS tracking, geofencing alerts, emergency SOS, activity monitoring, safe zones.
Tech Stack: Swift, Objective-C, Socket.IO, FCM, Apple Wallet, IAP, CoreLocation
- ClientIncipient IT
- Team3 developers
- Date2016 - 2017
-
Health & Wellness Platform - Natural health and wellness application connecting users with health experts and providing personalized wellness advice.
Key Features: Expert consultations, wellness tracking, personalized recommendations, content library, in-app purchases.
Tech Stack: Swift, Objective-C, Socket.IO, FCM, Apple Wallet, IAP
- ClientIncipient IT
- Team2 developers
- Date2015 - 2016
-
Telecom Messaging Apps - OTT messaging applications for Vietnam's major telecom providers (Vinaphone & Mobifone) with voice/video calling.
Key Features: Voice/video calls, instant messaging, group chats, file sharing, push notifications.
Tech Stack: Objective-C, Socket.IO, Push Notifications, RESTful APIs, Deep Linking
- ClientVinaphone & Mobifone
- Team4 developers
- Date2014 - 2015
-
Cloud Storage Solution - Enterprise cloud storage and file management application for 3T Shanghai, China with secure file synchronization.
Key Features: Cloud file storage, secure sync, file sharing, push notifications, offline access.
Tech Stack: Objective-C, Socket.IO, Push Notifications, RESTful APIs
- Client3T Shanghai, China
- Team4 developers
- Date2013 - 2014
-
Crypto Wallet Application - Secure cryptocurrency wallet app for managing digital assets with real-time market data and transaction capabilities.
Key Features: Multi-currency support, secure wallet management, real-time price tracking, QR code scanning, transaction history, push notifications.
Tech Stack: Swift, Objective-C, Socket.IO, Apple Wallet, IAP, Blockchain APIs
- ClientIncipient IT
- Team1 developer (Solo)
- Date2018
-
Time Management Application - Productivity and time tracking app with smart scheduling and analytics for better work-life balance.
Key Features: Time tracking, smart scheduling, productivity analytics, calendar sync, notifications.
Tech Stack: Swift, Objective-C, CoreData, CloudKit, RESTful APIs
- ClientSimble Solutions
- Team2 developers
- Date2018
- Let's Connect
Get in touch
I'm currently avaliable to take on new projects, so feel free to send me a message about anything that you want to run past me. You can contact anytime at 24/7
- Legal
Privacy Policy & Terms of Service
Privacy Policy
Last updated: August 2026
1. Introduction
Do Trung Dung ("I", "me", "my") is committed to protecting your privacy. This Privacy Policy explains how I collect, use, and safeguard information when you use my portfolio website and mobile applications developed by me. By using my services, you consent to the practices outlined in this policy.
2. Information Collection
2.1 Portfolio Website
This portfolio website does not collect personal information unless you voluntarily submit it through the contact form. Information you provide (name, email, message) is used solely to respond to your inquiries.
2.2 Mobile Applications
Applications I develop may collect:
• Device information (model, OS version) for compatibility purposes
• Location data (only when explicitly required for app functionality)
• Usage analytics to improve app performance
• Crash reports for debugging and stability improvements
3. Data Usage & Storage
I use collected data only for:
• Providing and improving services
• Responding to user inquiries
• Analyzing app performance and user experience
Data is stored securely using industry-standard encryption and security measures. I do not sell, trade, or transfer your personal information to third parties without your consent.
4. Third-Party Services
My applications may integrate third-party services such as:
• Firebase (analytics, crash reporting, push notifications)
• AWS (cloud services)
• Payment processors (Apple Pay, Google Pay)
These services have their own privacy policies, and I encourage you to review them.
5. Your Rights
You have the right to:
• Access your personal data
• Request correction or deletion of your data
• Opt-out of data collection where applicable
• Withdraw consent at any time
Terms of Service
Last updated: August 2026
1. Services
I provide mobile application development services including:
• iOS development (Swift, Objective-C)
• Android development (Java, Kotlin)
• Cross-platform development (React Native, Flutter)
• Technical consultation and support
• Bug fixing and app maintenance
• UI/UX design with Figma and Sketch
2. Project Engagement
2.1 Communication
I maintain clear communication throughout the development process and am available for discussions via email, chat, or video calls.
2.2 Deliverables
All project deliverables, timelines, and milestones will be agreed upon before project commencement. Source code and assets will be transferred upon project completion and final payment.
2.3 Confidentiality
I treat all client project information as confidential and will not disclose proprietary details without explicit permission.
3. Payment Terms
Payment terms are agreed upon per project basis. Standard terms include milestone-based payments or hourly rates as negotiated.
4. Intellectual Property
Upon full payment, clients receive full ownership of the custom code and assets created specifically for their project. I retain the right to use generic, non-proprietary code components in future projects.
5. Limitation of Liability
I strive to deliver high-quality work but cannot be held liable for indirect, incidental, or consequential damages arising from the use of my services or applications.
6. Contact Information
For any questions regarding this Privacy Policy or Terms of Service, please contact me at:
Do Trung Dung
Email: dungdt.iosdeveloper@gmail.com
Phone: +84 845 553 222
Location: Long Bien, Ha Noi, Vietnam