Simon Zhao

Experience

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  Jumei.com

  Jan 2014 - Jan 2017

  Senior Machine Learning Engineer

  Machine Learning - Recommendation AlgorithmMonthly Active Users: > 50 millionsPIC of machine learning, built pipeline & models from scratch. - 1) Recommendation (Recall & Rank) Algorithms: Have developed and optimized recommendation data pipeline & algorithms (recall & ranking) for Jumei.com, with my effort, the GMV has +46.6% on the main page of jumei.com, for product detail pages, GMV has +83.3%, as well as other minor scenarios. - 2) Natural Language Processing: Have developed natural language processing system to automatically deal with product comments & customer complaints. - 3) Customer Retention Algorithms: Have applied machine learning to automatically deal with customer retention issues. Show less

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  Alibaba Group

  Jan 2017 - Jan 2020

  Senior Machine Learning Engineer

  Alipay - Machine Learning - Recommendation AlgorithmsMonthly Active Users: > 1 billion - 1) Alipay Mall (or Benefit Pay): Alipay Mall machine learning PIC. Alipay Mall was the core and largest recommendation scenario in Alipay (Monthly Active Users > 400 million). - 2) Alipay User / Item Protraits: Have built a full set of user and item portraits for Alipay. They are still widely used in Alipay today. - 3) Alipay Red Packet: Alipay core marketing activity in 2018 (billion dollars scale). Participated in ROI (Return On Investment) Algorithm Research & Development: the minimum budgets to spur the maximum Daily Active Users. - 4) Alipay Voucher Recommendation: Core marketing activity of Alipay in 2018 (billion dollars scale). Participated in Recommendation System and Algorithms development. - 5) Machine Learning Online Monitors: Have built up the monitor systems to monitor each step in the machine learning data pipeline, in order to fast detecting any model performance issues. Show less

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  Shopee

  Jan 2020 - Jan 2024

  Senior Expert Machine Learning Engineer

  Machine Learning - Ads & Recommendation AlgorithmsMonthly Active Users: > 500 millions - 1) Recommendation (Recall & Rank) Algorithms: Have developed and optimized recommendation algorithms for most scenarios in Shopee, some scenarios even doubled their orders with my effort. - 2) Search Ads Ranking Algorithms: Have developed and optimized search ads ranking & CTR calibration algorithms for search ads, improved CTR & revenue. - 3) Rerank Algorithms: Have solved the recommendation homogeneous problem for Shopee. - 4) Post-purchase filters: Have solved the post purchase problems for Shopee. - 5) Reinforcement Learning Algorithms: Have successfully applied Reinforcement Learning in productive recommendation system. Show less

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  Meta

  Jan 2024 - now

  Staff Machine Learning Engineer

  Machine Learning - Recommendation AlgorithmsMonthly Active Users: > 3 billionsFacebook Feeds RecommendationResponsible for Facebook In-Feeds Ranking, responsibilities including ML data pipeline, feature engineering, ML models etc. * Trillion-parameter large generative models for recommendation systems. * Sequence modeling & feature crossing enhancement.