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Jakub Gruszczyński is the Chief Science Officer at eStoreMedia and the Vice-Chairperson of the Management Board at Avir sp. z o.o. Jakub is also an Internet Research Consultant at Grupa Allegro and the Owner of a company called To się da policzyć!. In the past, Jakub has held positions such as Head of Market Intelligence at Gadu-Gadu and Head of Business Intelligence and Customer Value Section at pkt.pl. Jakub has a Master of Science (MSc) in Mathematics from the University of Warsaw and a Doctor of Philosophy (PhD) in Economics from SGH Warsaw School of Economics.