# Tran Ngoc Tien Portfolio > Tran Ngoc Tien is a Mobile Developer and Mobile Engineer in Ho Chi Minh City, Vietnam specializing in Android, iOS, Flutter, Kotlin, Swift, Dart, Firebase, Clean Architecture, WebSocket, VPN apps, WireGuard, and production mobile engineering. ## Key pages - [Portfolio home](/): Profile, platform expertise, work experience, production mobile case studies, education, and contact links. - [Mobile developer profile](/mobile-developer): Focused profile page for Android, iOS, Flutter services, production mobile engineering expertise, and FAQ. - [Machine-readable profile](/profile.md): Concise summary of skills, projects, work history, and contact details. - [Sitemap](/sitemap.xml): Canonical indexable URLs for search engines. - [Robots](/robots.txt): Crawl permissions for search and AI crawlers. - [CV](https://rxresu.me/ngoctientnt.vn/mobile-developer): External mobile developer CV. - [LinkedIn](https://www.linkedin.com/in/ngoctientnt/): Professional profile. - [GitHub](https://github.com/ngoctientnt): Source code and engineering activity. ## Expertise - Native Android development with Kotlin, Jetpack Compose, MVVM, MVI, Hilt, and Clean Architecture. - Native iOS development with Swift, SwiftUI, Firebase, REST APIs, and native user experience. - Flutter development with Dart, Firebase, WebSocket, Riverpod, Bloc, and cross-platform delivery. - Production mobile systems including real-time messaging, push notifications, subscriptions, VPN networking, API integration, and release support. ## Mobile development services - Native Android app development: Kotlin, Jetpack Compose, MVVM, MVI, Hilt, Firebase, REST APIs, and Clean Architecture. - Native iOS app development: Swift, SwiftUI, Firebase, REST APIs, production debugging, release support, and native user experience. - Flutter cross-platform development: Dart, Firebase, WebSocket, Riverpod, Bloc, subscriptions, and shared Android/iOS product logic. ## Featured production apps - TurisVPN: Flutter VPN application using WireGuard over UDP, subscriptions, Firebase messaging, and secure connection lifecycle work. - We Solo: Native Android and iOS social travel platform with itinerary management, events, Firebase Authentication, and real-time updates. - Comana: Multi-tenant business workflow app with role-based access, Firebase Cloud Messaging, REST APIs, MVVM, and Clean Architecture. - Clinger: Flutter real-time social networking app with Firebase, WebSocket communication, Riverpod, and synchronized Android/iOS delivery. ## Contact - Email: ngoctientnt.vn@gmail.com - Location: Ho Chi Minh City, Vietnam - Alternate names: Tran Ngoc Tien, Trần Ngọc Tiến, ngoctienTNT, ngoctientnt