- Migrating and maintained client's Subscription Aggregator System by utilizing technologies such as Java 17, Spring Boot, MongoDB, Kafka, and microservices.- Guarantee comprehensive test coverage from unit to integration testing using JUnit5, Mockito, and JaCoCo, increasing test coverage from 0% to 80% for most services.- Designing new stock management architecture for inventory operations, enabling integration with multiple partners.

E-commerce Multi-platform Management System:- Basic CRUD operation features for product, order, platform, user, ... - Utilizing message queue for microservice communication- Enhancing data importer performance by using Batch Processing- Researching and developing integrated solutions with TikTok, Shopify APIs- Mentoring and training UK Fresher Engineers from the client team

Design an employee management solution on the Android mobile application for factory during the challenging period of the Covid-19 pandemic.- Implemented the MVVM architectural pattern for an Android application- Implemented employee management interface- Implemented image processing techniques to enhance the quality and appearance of captured images (crop and resolution image)

Applying STEAM model for teaching elementary and secondary students:- Game programming with Scratch and Tinker- Introduction to computer science with Python- PyQT5 for interactive interface