Wei M. Email & Phone Number

United States

中国 上海市

上海

Payment Risk: GNN based transaction risk detection, click-stream sequential embedding for fraudulent transaction detection, massive fake registered accounts detection using clustering method, spammy activities detection from messages system and et al.

上海

Credit scoring service, SDK based fraudulent behavior detection service, fraudulent transaction detection, Anti-Money Laundry solution, Graph-based Risk solution, intelligent customer service and et al.

Shanghai

- User search experience analysis and research: Analyze the impact of user search behavior on the launch of new features of search ranking algorithm or search front end.- Improve eBay search function: Research on new factors/features that improve existing search algorithm on search relevance and financial gain; spot and develop algorithm to demote spammy items/sellers in search result to provide a healthy and fair search platform.- Crowdsourcing quality improve: Develop algorithm to spot spammers of crowdsourcing which eBay hired to rate search relevance.- eBay A/B online test methodology design and analysis: Collaborate with Prestigious Professor to improve A/B online test accuracy and efficiency using post-stratified method.

Columbus, Ohio Area

Propose customized marketing strategy to help clients acquire new customers, maintain loyalty of existing customers and increase profitability by improving efficiency of marketing programs on different customer segments.