Haihua Wang

Manager, Senior Data Analytics @Walmart Global Tech

Sunnyvale, CA, US

Led and designed comprehensive visualizations and monthly reports for the US and international marketplaces, including regions such as the US, Canada, Mexico, South Africa, India, Chile, and others.• Implemented various time series forecasting techniques to predict seller performance and behavior after on board, lowering the rate of Seller Fraud and Overturn rate.• Led the development and implementation of a comprehensive KPI calculation and visualization for the Global teams (China, Canada, Mexico, Chile etc.), increasing visibility into critical seller metrics and driving better decision making.• Working with cross-functional team like seller team, IP team, item team to develop metric for Executive summary dashboard to management team• Developed and implemented a machine learning model to analyze the impact of product ratings and reviews on sales performance, resulting in a 15% increase in conversion rates.• Utilized Random Forest and Gradient Boosting algorithms to predict sales performance based on rating and review characteristics, achieving an R-squared of 0.85• Lead rating and review program based on fine-tune DistilBERT model using PEFT to analyze item and seller review to understand the overall sentiment towards items with over 90% accuracy rate.• Built a tracking system for the delivery team to track cold chain effectiveness, ensuring on-time delivery of perishable items using Python, SQL, and Tableau.• Achieved a 21% performance increase through the successful migration of data from Presto to Google Big Query.• Implemented a real-time reporting dashboard using SQL and Tableau for sellers, providing critical insights, and proactively addressing counterfeit rate issues.• Collaborated effectively with cross-functional teams to build a data-driven dashboard that included advanced monitoring and alerting capabilities, enhancing the team\'s ability to track and respond to key performance indicators.

University of San Francisco

Master of Arts - MA, Economics

Harvard Business School Online

Certificate in Business Analytics

University of San Francisco

Bachelor of Business Administration - BBA, Finance, General

Renmin University of China

Bachelor's degree, Finance, General