Dr. Junrui Di is a statistican who supports the digital medicine team Pfizer Inc. His research centers around high dimensional and high frequency data collected by wearable devices and digital health technologies which have been widely used in multiple therapeutic areas at Pfizer. He obtained his PhD in Biostatistics from Johns Hopkins University in 2019 where his graduate research focused on feature engineering, statistical modeling, and machine learning methods for data collected by wearable devices.