Rafal is a data scientist working at PAYBACK for last 3.5 years. He is alumni of best polish economic university Warsaw School of Economics. Therefore, Rafal is not just interested in applying Machine Learning and AI methods, but also always making sure that those methods improve KPI and bring customers more satisfaction. Prior to PAYBACK, Rafal worked at the data analytics for Healthcare system, especially in fraud area. He is a polish winner of EY 2019 Data Science challenge.