Developed and maintained a distributed parking system which is used by more than 700 parks in China.Integrated Ads APIs into backend, allows the frontend to display Ads based on the user, generated over 30,000 RMB revenue.Integrated Alipay payment method into the backend, allow user to pay with Alipay.Optimized the database of the system by separate I/O and separate hot/cold data, increased the querying speed by 50%.Implemented left parking slot querying… Show more Developed and maintained a distributed parking system which is used by more than 700 parks in China.Integrated Ads APIs into backend, allows the frontend to display Ads based on the user, generated over 30,000 RMB revenue.Integrated Alipay payment method into the backend, allow user to pay with Alipay.Optimized the database of the system by separate I/O and separate hot/cold data, increased the querying speed by 50%.Implemented left parking slot querying function of the parking system, including the data upload process at parks, the data processing at the cloud and the APIs exposed to the frontend.Cooperated with Empark to provide parking support in their application. Show less

Constructed and diagnosed the smart service robot which provide basic service and recommend product to the customer in banks.Construct the backend service for the smart robot with SpringMVC, and Mybatis. Implemented APIs with API token and MD5 signature to improve security.Construct the backend service for the identification related services.The robot has been deployed to over 3000 branches of Postal Savings Bank of China.Participated in Agile driven development.