Design and development important new features such as alerts for expiring coupons, mass production of coupon QR code and a new membership system.

Code refactoring of the payment, lottery, and membership systems for 30% decrease of database query, a significant reduction in latency.

Interface integration with Alipay and WeChat for online payment.

Human gait recognition based on mobile acceleration data.

Acquiring data from the mobile acceleration sensor before cleaning and normalizing the data.

Feature selection and parameter optimization using LibSVM package.

Development of android app that performs real-time recognition using acceleration sensor.