Senior Android Developer with 8+ years of experience in delivering robust, scalable, and user-centric Android applications. Skilled in architecting complex systems, optimizing app performance, and integrating advanced features for diverse business domains. Proven ability to lead development teams, mentor junior developers, and collaborate with stakeholders to align technical solutions with business goals. Successfully contributed to projects in logistics, education, and entertainment sectors for global clients.

• Programming Languages: Kotlin, Java 

• Frameworks & Libraries: Android SDK, Jetpack, Retrofit, Koin, Coroutines, RxJava

• Development Tools: Android Studio, Gradle, Git, Bitbucket, Firebase, Fastlane

• Architectures: MVVM, Clean Architecture, Modular Architecture

• Integrations: RESTful APIs, GraphQL, Firebase Cloud Messaging

• Testing: JUnit, Espresso, Robolectric, MockK

• DevOps & CI/CD: CircleCI, GitLab CI, Jenkins

• Others: Material Design, Accessibility, App Security, Performance Tuning

Logistics Tracking App – Germany

Senior Android Developer, Jan 2024 – May 2025

Project description 

• Developed a logistics application for real-time tracking of shipments, route optimization, and delivery status updates, designed to improve operational efficiency for businesses.

Responsibilities 

• Architected the app using Clean Architecture to ensure scalability and maintainability

• Implemented real-time tracking with GPS and WebSocket for live updates.

• Led a team of 4 developers, coordinating tasks and ensuring timely delivery.

• Optimized app for battery efficiency, reducing power consumption by 15%.

Technologies 

• Kotlin, Android SDK, Jetpack Compose, Retrofit, Koin, Room, WebSocket, JUnit, Robolectric

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Education Mobile App – Canada

Senior Android Developer, Dec 2020 – Dec 2023

Project description 

• Built an educational platform enabling students to access courses, take quizzes, and interact with instructors through a seamless mobile interface.

Responsibilities 

• Designed and implemented interactive features like offline content access and quiz modules

• Integrated GraphQL APIs for efficient data fetching and caching.

• Mentored 2 junior developers on best practices for MVVM and testing.

• Ensured accessibility compliance for users with disabilities.

Technologies 

• Kotlin, Java, Android SDK, Jetpack ViewModel, GraphQL, Firebase, MockK, CircleCI

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Entertainment Streaming App – Japan

Android Developer, July 2018 – Oct 2020

Project description 

• Created a video streaming application for delivering high-quality content, supporting offline downloads and personalized recommendations

Responsibilities 

• Developed video playback and offline download features using ExoPlayer.

• Optimized app performance for smooth streaming on low-bandwidth networks

• Collaborated with UI/UX team to implement Material Design guidelines.

• Wrote comprehensive unit and UI tests to ensure feature stability.  

Technologies 

• Java, Android SDK, ExoPlayer, Retrofit, Firebase, JUnit, Espresso

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Fitness Mobile App – Brazil

Flutter Developer, May 2016 – Jun 2017

Project description 

• Developed a fitness app for tracking workouts, providing personalized training plans, and integrating with wearable devices.

Responsibilities

• Implemented wearable device integration for real-time health data syncing

• Built a custom workout tracking module with animated UI components

• Ensured data security for user health information with encryption.

• Optimized app for performance on mid-range and low-end devices.

Technologies

• Java, Android SDK, Retrofit, SQLite, Firebase, JUnit

Education:

University of Information Technology Ho Chi Minh City, Vietnam  

Bachelor of Science in Computer Science