Lei Fang is a skilled data scientist with extensive experience in machine learning and statistics. Previously, Lei Fang served as a Staff Machine Learning Scientist at PayPal and held the position of Senior Data Scientist at Personal Capital. Prior roles include Data Scientist positions focused on Product Classification and Recommendation Systems at Wayfair. Lei Fang's academic background includes a Doctor of Philosophy (Ph.D.) in Statistics from Humboldt-Universität zu Berlin and a Master's Degree in Business Statistics and Operational Research from Hong Kong Baptist University. Additionally, Lei Fang worked as a Statistician Researcher and Program Manager at Humboldt-Universität zu Berlin, showcasing a strong blend of research and practical application in the field.