Dr. William Chang joined the Baidu team in January 2007 as Chief Scientist. Prior to joining Baidu, Dr. Chang served as the CTO of Infoseek and the VP of Strategy of Go Network. He is also the creator of the highly successful Infoseek natural language search engine. Dr. Chang has extensive expertise in search technology, online community building and advertising business models.

Dr. Chang earned an undergraduate degree in mathematics from Harvard and a PhD in computer science from the University of California, Berkeley for his breakthrough work in text search. At the renowned Cold Spring Harbor Laboratory, Dr. Chang mapped a genome and invented a protein sequence search methodology. More recently, he created a contextual advertising product at Sentius Corporation, and founded Affini, Inc.