· Developed the single sign on system(SSO) to let internal teams to manage application accounts

· Implemented RESTful APIs to create, retrieve and update employee account info with Spring Boot and

MySQL from internal analysis teams

· Achieved organization construction by using Spring Data JPA and customized JPA repository

· Built backend for data visualization by subscribing data from RabbitMQ and integrating WebSocket

· Improved data retrieval performance by using Redis as cache