Qing Zhang

About Qing Zhang

An innovative and result-oriented Sr. Data Scientist with 5 years of experience…

Experience

1. Senior Data Scientist (Nlp, Machine Learning)

   American Express

   Oct 2020 — Present

   Machine Learning: NLP model enhanced marketing campaign [NLP, BERT]• Conducted exploratory NLP model and data analysis to uncover the insights from call log and chat by BERT model, leading to 31% incremental gini score of response model• Collaborated with cross-functional teams to launch the campaign with customized messaging based on the insight, resulting in 3X credit card application rate,$5.2M incremental yearly revenueMachine Learning: Multi-Touch Attribution [Python, sklearn]• Created Multi-Touch Attribution for product acquisition with long sales cycle which reveals how marketing effort has long term impact beyond immediate sales performance which was used for marketing investment decision• Evaluated sales team incremental contribution which is only 1% different compared with the A/B test result• Led cross-functional team as well as contract employees from different time zone countries totally 7 team members to scale Multi-Touch Attribution for all Global Consumer Service (US) AcquisitionsMachine Learning: Pricing Sensitivity - Heterogeneous Treatment Effect [Python, xgboost]• Built the best methodology for Heterogeneous Treatment Effect across the company by an ensemble-based method• Built a highly scalable solution and guided team members to quickly replicate across Business Loan Pricing, and Automated Payments incremental spend