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Jarosław Rencz is an experienced Front-End Developer with a career spanning over a decade. Currently at Wonga since July 2017, Rencz specializes in front-end JavaScript development for Polona.pl, a platform for exploring digital collections from the Polish National Library. Prior roles include Lead Front-End Developer at Functionite, Frontend Developer/Symfony Developer at Laboratorium EE, and various positions at Polibuda.info, including Editor in Chief. Rencz has also contributed to the web development field through freelance work and leadership roles in student organizations. Educational background includes an Engineer's degree in Materials Engineering from Warsaw University of Technology.