Yifan Hu is a Senior Director of Research at Yahoo Research. Prior to joining Yahoo, he worked at AT&T Labs, Wolfram Research, and at Daresbury Laboratory. He received his B.S. and M.S. in applied mathematics from Shanghai Jiao-Tong University, and Ph.D. in optimization from Loughborough University. His research interests include data mining, applied machine learning and vusualization. He is a co-author of a number of best papers, including the 2017 ICDM 10-year highest impact award paper about recommender systems.