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Sergei Kovalenkov is a seasoned frontend developer with extensive experience in web development and project leadership. Currently serving as a Senior Frontend Developer at Cogniteam since February 2023, Sergei previously held the position of Lead Frontend Developer at Rambler&Co from June 2015 to February 2023, where significant contributions included the development of various projects such as Rambler/travel and Rambler/video, focusing on creating booking systems and transitioning to React. Prior roles include Frontend Developer positions at Точка Кипения, Ruformat, Webstroy, and PLAN-B creative group, where achievements encompassed developing e-commerce websites and specialized systems. Sergei holds a Master's degree in Applied Informatics from Southern University, completed in June 2012.