1. Designed and built a new micro service for K2 Midtier team using Java, which reduced latency when refreshing geographic database and prevented 10 seconds of service suspension and unavailability. Restructured and migrated location formatter using a new library which provides APIs for the whole team.2. Implemented the service using OffSpring(Spring like framework) and REST.li (IoC framework), which provides APIs for decorating the location of Linkedin member profile. Add deployment configurations for Azure, MANDA and load balancing.3. Realized Unit Tests and Integration Tests using JUnit 5. Deployed this service and datapacks on Azure in both EI and Prod environment. Onboarded the dashboard, alerts and documented the runbook.4. Designed and implemented Rest.li client for this service and make change to the upstream service to call my service using LiX(A/B Test framework).

(1) Captured packet and analyzed existing system problem using Android systrace. Then implemented wechat , QQ, taobao(top apps in China) etc. optimization and merged into MIUI Version 10(2) Designed and built automated testing tools using Python and Java, which calculated frame drop rate, applications opening time, application installation time, etc. This increased testing efficiency by 100%(3) Filed a patent (PF1804702CN-6472-190229I). Method for improving response speed and fluency during application use, which has an average performance improvement of bf 10% on taobao, .etc and affected over 190 million users

Implemented a racing data analysis software using C# & user documentations for UCI racers. It depicts the performance of different sensors in the racing cars and show the racing routes for comparison as well as dynamically demonstrate the racing process.

Used JavaScript and React to design a website for students to perform online experiments.