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Bartosz Polańczyk is a seasoned software engineer with extensive experience in frontend development, currently serving as a Senior Frontend Engineer (Lead) at Sumo Logic since December 2021, focusing on optimizing the UI platform within the Application Observability team. In addition to a role as a React/JS lecturer at Coders Lab since July 2018, Bartosz operates as a self-employed consultant with StingRay Consulting, creating products aligned with professional values. Previous positions include software engineering at Facebook through Crystal Equation Corporation, a senior frontend engineering role at Vodeno, and contributions to digital signage development at Enplug. With a strong foundation in full stack development and a solid educational background including multiple degrees in Psychology and Telecommunications from the University of Warsaw and Warsaw University of Technology, Bartosz demonstrates proficiency in JavaScript, TypeScript, C#, PHP, and several other technologies.