Tim Wu Email and Phone Number

Java/Spring Boot/JPA/Mybatis/MySQL/Liquibase/Redis/Kafka- Independently built a commission monitoring system and relevant documents, multithreading calculated with around 0.5 million daily entries. Identified and rectified errors, and reduced the company's losses.- Delving into Spring @Transational issue in the system, and providing a solution and relevant documents.- Optimize the batch upload function, and resolved slow SQL in the System, including all CRUD.- Led the team in tracking and managing progress within the payment module of system integration.- Collaborated with a cross-functional Payment Team, engaged in daily discussions with Project Managers to outline requirements, completing daily and weekly tasks. - Identified and resolved production issues, categorized the issue types, and delivered them to relevant developers or implemented fixes myself.

Java/Spring Boot/Jmeter/Shell/ PL/SQL / PostgreSQL - Assisted in performance testing, by building a Jmeter script and adding features like logging time metrics with AOP. - Collaborated with 2 Architects, and 1 System Analyst, and communicated with the RD team to accomplish the data migration process of about one billion data. - Accomplished the data migration process by : -- Developing a Spring Boot service to integrate all the needed features of the current application. -- Built PL/SQL script and tuned the whole data migration process and SQL performance to ensure it was done in a limited time frame. -- Used a robust ETL tool called Pentaho Data Integration(PDI) for controlling the transformation flow. -- Developed a validation function with PL/SQL and PDI script to ensure completion of the transformation. - Transfer DB2 SQL to PostgreSQL for the report.

Java/Spring/Mybatis/Javascript/Jquery/Vue3/Typescript/Oracle/Redis/Kubernetes - Assisted in the current system's architecture improvement process by refactoring the system to the containerization application. - Built and maintained components in Kubernetes, including Redis, ELK Filebeat, and applications that had been containerized into micro-service. - Assisted in upgrading the system structure from traditional SSR to structure in the separation of frontend and backend, by building a Vue3 project template as a front-end client application and integrating it into the current system, ensuring that both the old and new structure can run concurrently. - Developed a micro-service which is a token-based authentication application with OAuth2 protocol and JWT, with the Spring Boot and Spring Security framework. - Enhanced the User Login flow of the internal system by adding security features like encrypting passwords and switching role functions for Admin User. - Maintained a Product Support system, including developing new features according to the user’s requirements, debugging, and troubleshooting code-related issues to ensure the application remained functional and bug-free.