• Machine learning platform

• Dispatch platform

• Java Developer Experience: Java service framework & library, build system, jvm performance.

• Payment platform

Worked in Revenue team, with responsibility to build and maintain high-performance, scalable advertisement, billing & payment system.

Working in payments integration team. Building, maintaining and upgrading payment gateway system for Amazon. Focusing on technologies of multihtreading programming, tcp/ip programming, distributed and scaling services, network security, etc.