This document contains a resume for Han Yan. It lists his contact information, skills including Java, Python, databases, and research areas. It then details his education including master's degrees in computer science and chemistry from New York University and a bachelor's degree from Nanjing University. The resume outlines Han's work experience including senior roles developing backend systems for mobile healthcare and Japanese startup apps. It provides details on projects like creating a supplier recommendation engine and photo sharing app. Finally, it lists a role developing a dance video game at Backbone Entertainment and work on Citigroup's investment trading platform.