Xuan Truong Tong
Tucson,AZ
Summary
Senior Mobile Developer and iOS Team Lead experienced in architecting scalable mobile applications across iOS and Android platforms. Led high-performance engineering teams, established best practices, and optimized application performance to enhance product stability and user retention. Authorized U.S. Permanent Resident able to work for any U.S. employer without restriction or sponsorship.
Overview
18
18
years of professional experience
Work History
Senior Mobile Developer
Poeta Digital
Calgary, Canada
09.2023 - 06.2026
- Developed and deployed native and cross-platform mobile applications for iOS and Android using Swift, SwiftUI, and React Native.
- Engineered clean app modules with MVVM architecture and Swift concurrency to enhance codebase scalability.
- Diagnosed and resolved complex memory leaks, thread safety issues, and UI rendering bottlenecks, achieving smooth 60fps performance.
- Constructed robust API integration layers and integrated third-party SDKs to expand application functionality.
- Implemented offline-first data persistence and caching strategies with Core Data and SQLite for reliable performance in low-connectivity environments.
- Optimized existing codebases and refactored legacy modules to improve execution speed and reduce crash rates.
- Enhanced user experience by streamlining data handling processes across applications.
iOS Team Lead
Poeta Digital
Ho Chi Minh City, Vietnam
10.2015 - 09.2023
- Directed an end-to-end iOS development team delivering high-performance native mobile applications for global clients across the complete SDLC.
- Architected robust application features using React Native, Swift, Objective-C, UIKit, Core Data, and RESTful APIs, ensuring high code maintainability and scalability.
- Established engineering best practices, coding standards, and rigorous code review workflows, enhancing app stability across the team.
- Mentored developers and streamlined task allocations in Agile environments, fostering collaboration with cross-functional product and QA teams.
- Diagnosed memory management and UI rendering bottlenecks, optimizing app performance for smooth 60fps user experiences.
iOS Team Lead (Remote - Part-Time)
SelfieYo
Boston, USA
11.2014 - 01.2022
- Led remote iOS development for high-volume US media-sharing product using Swift, Objective-C, and UIKit.
- Developed social networking features, local data caching, media handling, and API integrations in collaboration with US product managers.
- Enhanced app reliability and user retention by addressing production crashes, ensuring thread safety, and optimizing API response latency.
Senior Mobile Developer
Quantic Co., Ltd
, Vietnam
07.2010 - 10.2015
- Built and supported 'doForms', an enterprise mobile data collection platform deployed across iOS, Android, and BlackBerry (JavaME).
- Implemented offline-first data synchronization layers with Core Data and SQLite to ensure reliable field data collection.
- Engineered media capture tools for barcode scanning, audio/video recording, GPS location logging, and custom form inputs to enhance data collection capabilities.
Technical Consultant (Remote - Part-Time)
CornerWorld Corporation
, USA
01.2013 - 01.2014
- Provided technical leadership and consulting on mobile architecture, network protocols, and real-time audio transmission, ensuring optimal system performance.
- Architected and delivered custom iOS VoIP solutions integrating low-level PJSIP C-libraries with Objective-C, enhancing communication capabilities.
- Analyzed client requirements to develop tailored technical solutions.
- Collaborated with cross-functional teams to streamline project workflows.
- Provided training sessions for clients on implemented systems and tools.
Senior Web Developer (Remote - Part-Time)
CardLab, Inc.
Richardson, Texas
06.2010 - 01.2014
- Engineered backends for enterprise gift card application using C#, ASP.NET, SQL Server, LINQ, and WCF web services to enhance transaction processing capabilities.
- Developed responsive web applications using HTML, CSS, and JavaScript frameworks.
- Collaborated with design teams to implement user-friendly interfaces and experiences.
- Optimized website performance through code reviews and debugging processes.
Mobile Game Developer
Gameloft
, Vietnam
09.2008 - 07.2010
- Developed and ported high-profile international mobile gaming titles (Spider-Man, Iron Man, Assassin's Creed) using J2ME and C++, enhancing player engagement across diverse platforms.
- Designed engaging game mechanics for mobile platforms using Unity and C#.
- Developed and implemented gameplay features based on user feedback and testing.
- Configured build scripts and optimized memory footprints for low-spec handheld hardware, ensuring seamless gameplay and stability while managing SVN version control systems.
- Collaborated with artists to create visually appealing game environments and characters.
Education
Bachelor's Degree - Software Engineering
University of Natural Sciences
Ho Chi Minh City, Vietnam01-2008
Cybersecurity Program & Advanced English Language Studies -
Pima Community College
Tucson, ArizonaSkills
Mobile Engineering: Swift, SwiftUI, Objective-C, UIKit, Swift Concurrency, React Native, Expo, Flutter, Android SDK, Kotlin
Architecture & Design: VIPER, MVVM, Mobile System Architecture, Component-Based Design, Threading & Performance, Memory Optimization
Frameworks & Core SDKs: Core Data, SQLite, Core Location, Core Animation, Offline Storage, PJSIP (VoIP), Firebase, Push Notifications
Payment & Integrations: Braintree, Branchio, RESTful APIs, JSON, AWS Integration, iOS Backend Integration
Developer Tools & CI/CD: Xcode, Android Studio, Git / GitHub, SVN, CocoaPods, Gradle, Bitrise CI/CD, Expo EAS, App Store Connect
Personal Information
Title: Senior Mobile Developer | iOS Lead Engineer | Software Engineer
Timeline
Senior Mobile Developer
Poeta Digital
09.2023 - 06.2026
iOS Team Lead
Poeta Digital
10.2015 - 09.2023
iOS Team Lead (Remote - Part-Time)
SelfieYo
11.2014 - 01.2022
Technical Consultant (Remote - Part-Time)
CornerWorld Corporation
01.2013 - 01.2014
Senior Mobile Developer
Quantic Co., Ltd
07.2010 - 10.2015
Senior Web Developer (Remote - Part-Time)
CardLab, Inc.
06.2010 - 01.2014
Mobile Game Developer
Gameloft
09.2008 - 07.2010
Bachelor's Degree - Software Engineering
University of Natural Sciences
Cybersecurity Program & Advanced English Language Studies -
Pima Community College