Eryk Lewinson is a senior data scientist for the online retailer bol.com, where he specializes in forecasting. Lewinson has worked as a data scientist since 2016, and has previously held roles as an enterprise risk services data scientist for Deloitte Poland and as a data scientist for PwC Polska and BUX. He is the author of the book Python for Finance Cookbook. Lewinson holds a master’s degree in quantitative finance from Erasmus University, Rotterdam.