Alexei Chernobrovov, Ph.D. Data science consultant, chernobrovov.com Worked with some well-known companies: Raiffeisen Bank, Mazda, Ok.ru (VK), M.Video, Rostelecom, X5 Retail Group, VTB, Severstal, SkyEng and etc. Lecture at X5 Academy and AIMasters. Member of the Expert Council of the Runet Prize. Speaker of all top conferences on marketing, analytics and data science: Re-Work (AI IN RETAIL), DSS EUROPE, DSC EUROPE, Oborot.ru, Datafest, Metamarkets, Go Analytics! and etc.