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Karen (Keying) Pei is a data scientist at Signifyd since June 2020, previously holding various analytical roles at Google, including business analyst for Google Cloud and growth analyst for Google Shopping. This experience involved translating business requirements into technical specifications, developing metrics and dashboards, enhancing marketing strategies through SKU selection, and improving logistical performance. Additional roles included marketing data analysis at Crazy Maple Studio, tech support engineering at Argus Merchant Services, and quantitative risk analysis at CME Group. Karen holds a Master of Science in Financial Mathematics from the University of Connecticut-Stamford, and a Bachelor of Economics in Finance from Guangdong University of Foreign Studies.