Cathy Q. is a highly accomplished machine learning professional with extensive experience in developing and implementing advanced algorithms for advertising and ranking systems. Currently serving as a Staff Machine Learning Engineer at Chewy since 2025, Cathy focuses on sponsored ads metrics. Previously, Cathy held the position of Senior Machine Learning Engineer at Pinterest (2023-2025) and Twitter (2021-2023), specializing in ads ranking and conversion modeling. Earlier roles include Machine Learning Scientist III at Expedia Group (2019-2021), where Cathy worked on hotel search ranking and car demand forecasting, and Machine Learning Engineer at Terawe Corporation (2018-2019), contributing to software development and various machine learning applications. Cathy holds a Ph.D. from the University of Pennsylvania, an MBA from the Questrom School of Business at Boston University, and a B.Sc. from the University of Science and Technology of China.
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