4-hour finish 100% coverage test. Test Automation : Build test automation in selenium, node.js, postman, and multi-thread run test in 1 day. System Stability : Write batch file for Jenkins calling test automation as regression tests, which were called by Jenkins after each deployment. Improve Algorithm : Research performance of 10 APIs as least using stress tests. And I talk with developers to improve algorithms. Project Document : Write and deliver test plans and reports Auditing : Make 2 scripts to audit abnormal accounting. Process abnormal payments in 2 days rather than customer report.