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Sergey Kolokolov is a seasoned professional in software development and testing, currently serving as a Senior SDET at Mosaic.tech since July 2022. Previously, Sergey worked at BlueOwl, LLC, where contributions included the development of a front-end testing automation library that improved test reliability and the creation of an API tool that enhanced code maintainability. Sergey also excelled as a Quality Assurance Engineer, automating over 300 test cases and significantly reducing release validation time. Prior experience includes roles as a Test Automation Engineer and QA Analyst at AppZen, where over 600 automated test cases were developed, and as a QA Intern at Prepdup with a focus on UI testing. Sergey holds a Master's degree in Law from the Russian State University of Justice.