◆ Co-develop database sharding by vertical partitioning, responsible for python script which handle proxy switch and record result when master or slave DB updating. ◆ Develop service center by microservice architecture and dockerize that avoide some service blocked in china. ◆ Build unit test environment and refactor function to single responsibility which made easier for testing. ◆ Reduce duplicate I/O and using RabbitMQ, Celery, Asyncio for speed up. E.g. distribution system speed up 30%. ◆ In charge in backend develop and design architecture. At the same time, teaching junior develop and peer code review.

◆ Developed python, bash and powershell scriptto extend system (Such as CI/CD pipline). During, develop and maintain 40 repository which increase testing coverage 5~10% ◆ Developed server temperature monitoring system, framework using flask, processing data by concurrency and data visualize. ◆ Developed upgrade/downgrade flash tool, develop by python and connect to serial port and handle massive data by generator data analyize. ◆ Developed and maintained Linux / Windows hardware check and reduce I/O and optimize algorithm which speed up 20%.

◆ Developed Back-End management analysis function to generate sales reports for internal usage. ◆ Add vendor warehouse management function for external users to manage warehouse more effectively and efficiently. ◆ Debugged and optimized front end to provide better user experience.