◦ Developed a JSON configurable workflow pipeline for data scientists to customized and automate

workflow using Java Spring Boot and Maven and deployed on AWS.

◦ Incorporated Quartz to periodically schedule job execution and monitor the pipeline progress.

◦ Built a task scheduler with Beans Factory to start tasks based on the order and dependency of tasks.

◦ Designed module to regulate and support data operations including Hive, MySQL, HDFS; support

executing scripts including Bash, Python; support executing execution files like Java Jar files.

Implemented JWT for user authentication and authorization in a project for a file storage system.

Used the HS256 algorithm for token signing and verification, and implemented token expiration and

refresh functionality to improve security.

Build a refresh token family, monitor used and in use tokens, prevent token theft, and promptly

terminate the use of the current token family once stolen.

Implemented CRUD for the users using RESTful API.

Implement read coil status function and read holding register function based on Modbus, including building request

and send request to slave, listening the response from slave and parse the response;

Implement CRC check code, cs check code, crc16 check code, crc32 check code and BCC XOR check code for data.