Before that, he was a Senior Research Scientist at eBay Research Labs, San Jose, CA. He received his Ph.D. degree in Computer Science from Rensselaer Polytechnic Institute (RPI) in 2009. His research interest focuses on developing novel algorithms in data mining, data management, information retrieval, machine learning, social network analysis, and bioinformatics. He won ACM SIGKDD doctoral dissertation award in 2010 and NSF CAREER award in 2012.