He is the founder of RockYou, a social game app development company based in Silicon Valley, USA. He served as CEO and CTO of RockYou and is well known for growing the company from its inception to a large company with 200 employees. In 2008, he was featured in Businessweek magazine as one of the top young entrepreneurs in their 20s. With investments from Sequoia Capital, Softbank, and Doll Capital Management, he successfully built a large-scale infrastructure capable of supporting large-scale social applications, games, and advertising networks globally. Rockyou.com, developed in the company's first year, demonstrated unprecedented rapid growth, acquiring 1 million users in just three months. He then founded a subsidiary, RockYouAsia, to expand the company into Asia and moved to Japan as representative of the Japanese headquarters. He also established a subsidiary in Beijing, China, and managed the company by traveling between Tokyo, Beijing, and the United States. He has a track record of delivering over 100 social games and applications, primarily to the Google Android and Apple iOS markets. Thanks to this track record and the connections he made at RockYou, he began receiving numerous requests to create apps.