Served as a backend developer for one of the world's largest international health and beauty retailers, primarily operating in Asia and EuropeCreated and enhanced several add-on features for the e-commerce checkout process:- Integrated multiple payment gateways and promotion engine hosts, enlarged payment options and promotional capabilities- Designed, developed, and maintained coupon and voucher modules, that improved user experience and functionalityUsed tools:- Migrated and refactored existing logic to the new environment, using SAP Hybris and Java for core development- Employed Postman for comprehensive API testing and documentation, ensuring system reliability and performance- Implemented Git for version control and collaborative development

- Assisted with internal mail server migration.- Supported infrastructure setup, including cabling and server installation.- Contributed to relocation projects.- Helped with OS installations and supports.

- Developed an internal-used web application for health-checking office devices using Node.js (and Express.js)- Batch installed OS for computers in a new hospital

- Integrated third-party libraries to allow customers to scan QR codes for further implementation.- Worked with Spring MVC on backend development and AngularJS on frontend development.