Ligeng Xia is a Machine Learning Engineer currently working at Meta since January 2022, within the Infra + Ranking ENG Group focusing on Ads Ranking and Foundational AI. Prior to this, Ligeng Xia held a Machine Learning Engineer position at Paytm Labs from April 2021 to January 2022, and a Data Scientist role at Canadian Tire Corporation from July 2019 to April 2021, where Ligeng Xia developed the cross banner recommender system for Canadian Tire, SportsCheck, and Marks. Ligeng Xia earned a Master’s Degree in Engineering from the University of Toronto (2016-2018) and a Bachelor’s Degree in Engineering from the University of Kentucky (2012-2015).