Karol Przystalski obtained a Ph.D. degree in Computer Science in 2015 at the Jagiellonian University in Cracow. He is the CTO and founder of Codete, leading and mentoring teams at Codete. He is working with Fortune 500 companies on data science projects. He has built a research lab for machine learning methods and big data solutions at Codete. Other than that he also gives speeches and training in data science with a focus on applied machine learning in German, Polish, and English. He used to be an O’Reilly trainer as well.