Ethan Hanjun Kim is a seasoned machine learning engineer with extensive experience in building advanced recommendation models at Meta since November 2025, contributing to the Modern Recommendation System (MRS) across various products. Prior to this, Ethan held a similar role at Moloco from August 2019 to October 2025, where assistance was provided to clients in developing and expanding their sponsored ad businesses through the Moloco Commerce Media (MCM) platform. Ethan's career began as a quantitative analyst, first at Barclays from July 2013 to June 2018, focusing on the Fixed Income, Currencies, and Commodities (FICC) desk, and previously at Markit from November 2010 to September 2012, specializing in equity exotic products. Ethan holds a Ph.D. in Mathematics from the University of Wisconsin-Madison and a BS in Mathematics from the Korea Advanced Institute of Science and Technology.
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