Ming is available for hire
Hire MingMing Xie
Verified Expert in Engineering
Android Developer
Location
The Hague, Netherlands
Toptal Member Since
August 22, 2022
Ming is a senior Android developer with ten years of experience building mobile apps for clients, including Mastercard, Just Eat Takeaway.com, and ING. Specialized in architecture design, Ming is passionate about building maintainable and scalable mobile products with the best user experiences.
Portfolio
Just Eat Takeaway.com
Android, Kotlin, Java, Android Jetpack, Model View ViewModel (MVVM), Dagger 2...
Mastercard
Kotlin, Java, Model View ViewModel (MVVM), Coroutines, Android Jetpack, Modular...
ANWB
Android, Java, Kotlin, KOIN, Android Jetpack, Model View ViewModel (MVVM)...
Experience
Availability
Part-time
Preferred Environment
Jira, Azure, GitLab, Slack, Android Studio, Sketch, Confluence, Figma, Postman, Jenkins
The most amazing...
...solution I've developed is the overview module for the most popular banking app in the Netherlands.
Work Experience
Senior Android Developer
2022 - 2022
Just Eat Takeaway.com
- Developed the business-critical driver app that serves couriers in more than 20 countries.
- Refactored the driver app with modern Android technologies, such as Kotlin, MVVM, coroutines, Jetpack Compose, and Dagger.
- Led a small and more frequent release process transition.
- Used and became experienced with Google Maps SDK and Google Navigation SDK.
Technologies: Android, Kotlin, Java, Android Jetpack, Model View ViewModel (MVVM), Dagger 2, Google Maps SDK, Google, SDKs, Dependency Injection, Maps, Gradle, Software Architecture, GPS, Android SDK, Firebase, Firebase Android SDK, Figma, API Design, Android Architecture Components, Android Architecture, Mobile Apps, Mobile APIs, Mobile App UI, Mobile App Design, Mobile App Testing, Native Mobile Apps, Mobile Applications, Mobile App Development, Unit Testing, RxJava, Android Studio, RxJava 2, Mobile, Mobile Development, Technical Leadership, Agile, Scalability, Architecture, Requirements Analysis, Mapbox
Senior Android Engineer
2021 - 2021
Mastercard
- Introduced the tokenization payment to the Netherlands via the ING Banking app targeting millions of users.
- Led the development of the tokenization payment module from the ground up to production release.
- Applied modern Android development technologies, such as Kotlin, MVVM, coroutines, and the single-activity architecture.
Technologies: Kotlin, Java, Model View ViewModel (MVVM), Coroutines, Android Jetpack, Modular, Payment APIs, Mobile Payments, Online Payments, Digital Payments, Gradle, Card Payments, Software Architecture, Android SDK, Azure, API Design, Android Architecture Components, Android Architecture, Mobile Apps, Mobile APIs, Mobile App UI, Mobile App Design, Mobile App Testing, Native Mobile Apps, Mobile Applications, Mobile App Development, Unit Testing, Espresso, Android Studio, iOS, Swift, Mobile, Mobile Development, Technical Leadership, Agile, Scalability, Architecture, Requirements Analysis
Senior Android Developer
2020 - 2021
ANWB
- Developed and maintained the ANWB parking and fuelling app that serves one million users.
- Refactored the parking module with modern Android development technologies.
- Led the technical transition to Kotlin, MVVM, coroutines, and Jetpack libraries.
- Used Google Maps SDK and became experienced with polygons, polylines, and custom markers.
Technologies: Android, Java, Kotlin, KOIN, Android Jetpack, Model View ViewModel (MVVM), Model View Intent (MVI), Google Maps SDK, Coroutines, Dependency Injection, Gradle, Software Architecture, GPS, Android SDK, Firebase, Firebase Android SDK, API Design, Android Architecture Components, Android Architecture, Mobile Apps, Mobile APIs, Mobile App UI, Mobile App Design, Mobile App Testing, Native Mobile Apps, Mobile Applications, Mobile App Development, Unit Testing, RxJava, Android Studio, Agile, RxJava 2, Mobile, Mobile Development, Technical Leadership, Scalability, Architecture, Requirements Analysis, Mapbox
Android Development Engineer
2014 - 2020
ING Group
- Developed and maintained ING Banking app modules that serve four million users.
- Led the migration of the overview module to the latest architecture, using Kotlin, MVVM, coroutines, and Jetpack libraries.
- Spearheaded the support library migration on a codebase used by 12 squads in two countries.
Technologies: Android, Java, Kotlin, Model View ViewModel (MVVM), Modular, Coroutines, Payment APIs, Digital Payments, Mobile Payments, Online Payments, Jenkins, Gradle, Card Payments, Software Architecture, Android Jetpack, Android SDK, API Design, Android Architecture Components, Android Architecture, Mobile Apps, Mobile APIs, Mobile App UI, Mobile App Design, Mobile App Testing, Native Mobile Apps, Mobile Applications, Mobile App Development, Unit Testing, Espresso, Android Studio, Mobile, Mobile Development, Technical Leadership, Agile, Scalability, Architecture, Requirements Analysis
Experience
Just Eat Takeaway.com Driver App
https://play.google.com/store/apps/details?id=com.takeaway.driverI developed and maintained the driver app for Just Eat Takeaway with Kotlin, Jetpack Compose, MVVM, Dagger, and coroutines, also working with the Google Navigation SDK. I introduced and led the new release process transition and the creation of the new jobs module for the app.
Mastercard Tokenization Payment App Module
I led the development of the tokenization payment module for the ING Banking app from the ground up to production release, introducing the tokenization payment to the Netherlands. The module was developed with modern Android development technologies, such as Kotlin, MVVM, coroutines, and the single-activity architecture.
ANWB Parking and Fuelling App
https://www.anwb.nl/mobiel/onderweg-appI took responsibility for developing and maintaining the ANWB Onderweg app that serves one million users. It involved refactoring the parking module with modern Android development technologies and leading the technical transition to Kotlin, MVVM, coroutines, and Jetpack libraries. It also required me to work with the Google Maps SDK and mentor junior developers.
ING Banking App
Oversaw the development and maintenance of various ING Banking app modules, leading the Android app modularization. It involved migrating the support library on a codebase used by 12 squads in two countries and the overview module to the latest architecture with Kotlin, MVVM, coroutines, and Jetpack libraries.
Skills
Languages
Kotlin, Java, Swift, Objective-C
Frameworks
Android SDK, Espresso, Dagger 2, KOIN
Libraries/APIs
LiveData, Android Architecture Components, Google Maps SDK, Firebase Android SDK, RxJava, RxJava 2
Tools
GitLab, GitLab CI/CD, Android Studio, Android Jetpack, Jira, Jenkins, Gradle, Figma, Confluence, Sketch, Miro, Postman
Paradigms
Human-computer Interaction (HCI), Human-centered Design (HCD), Model View ViewModel (MVVM), Model View Intent (MVI), Mobile App Design, Unit Testing, Dependency Injection, Mobile Development, Agile, Requirements Analysis
Platforms
Android, Azure, Firebase, iOS, Mobile, Mapbox
Other
Coroutines, Modular, Software Architecture, Android Architecture, Mobile Apps, Mobile APIs, Mobile App UI, Mobile App Testing, Native Mobile Apps, Mobile Applications, Mobile App Development, Maps, Payment APIs, Mobile Payments, Online Payments, Digital Payments, Mastercard, Card Payments, GPS, API Design, Google, SDKs, Technical Leadership, Scalability, Architecture
Education
2011 - 2013
Master's Degree in Computer Science
RWTH Aachen University - Aachen, Germany
2010 - 2011
Master's Degree in Computer Science
The University of Edinburgh - Edinburgh, UK
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