Or Levi is a Senior Data Scientist at Marktplaats.nl/ebay, specializing in Machine Learning/Learning-to-Rank for Computational Advertising. He holds a M.Sc. (Magna Cum Laude) in Information Retrieval from the Technion, the Israel Institute of Technology. In the last year, Or received the ebay Excellence in Innovation Award and authored the first ever paper at ebay Classifieds Group to be accepted to an ACM conference.