His key responsibilities are web application penetration testing, threat modeling, and source code review. Moreover, he works as a Security Consultant, helping software development teams cope with application-security-related topics. He has performed more than 70 application security trainings dedicated to software developers. Previously, when he worked as a software developer, he was building software for the financial sector. He has been a speaker both at international and Polish conferences and meetings dedicated to software development and IT security. A casual bug bounty hunter, listed in the Halls of Fame of such companies, like Adobe, Algolia, GM, Jet, Netflix, Tesla, Twitter, Uber, and Yahoo.