. Lead analytics team to build up ETL pipelines, API-Dashboard, and Machine Learning fraud prevention model for achieving Groupon global engineering operation and financial operation KPI.

. Increase 5% payment authorizing rate by redesigning recurring payment for Groupon Select Loyalty Program . Formulate databases, tables, catalog, metadata for all fraud services with GDPR compliance in universal shopping cart, guest checkout, payment processor migration, and database Cloud Migration project. . Develop and manage data modeling from multiple fraud prevention and payment gateways services by setting up API, data processing, data types, compliance logic, and business logic. . Perform P&L, pricing, and ML model evaluation for partnership including Chase, Adyen, VISA, Amex, PayPal

.Increase 10% revenue from 150 dealerships by building precisely advertising digital campaigns. .Reduce 90+% time on manual works of analysis reports by developing programmatic analytical apps, including HTML, JavaScript, SQL, Python, Flask. Systematically envision digital performance and inventory opportunity. .Create an analytical pipeline to visualize data from Google Analytics API, internal MySQL, Salesforce SOQL to actionable digital strategy, marketing performance, using SQL, Python, R, and Tableau .Thrive in a cross-functional team to improve the 5% retention rate by consolidating patterns on pricing, promotions, and products from 3000+ clients' digital campaign data. .Streamline analyzing process for 1500+ dealers, OEM, large group customers' attribution, ROI, Velocity reports including 30+ critical digital marketing index such as New%, Goals, Events, Engagements. .Establish a predictive time series model for forecasting vehicle sales, upselling 50+ campaigns' budget monthly.

.Develop Python and Perl web-based applications to parse and process earth science big data from IRIS earthquake data center to establish 3-dimensional earthquake real-time analysis and geotechnical reports. .Formulated efficient process on 100GB streaming data with MySQL, ArcGIS in Linux enhancing the accuracy of environmental science and geophysics studies