Stefan M.

Stefan M. is a cybersecurity professional with extensive experience in penetration testing and application security. Currently serving as a Cybersecurity Penetration Tester at Rivian since February 2025, responsibilities include performing penetration tests and collaborating with security engineering teams. Stefan is also a Bug Bounty Hunter for multiple platforms including Bugcrowd, Synack Red Team, and HackerOne since 2017. Previous roles include Application Security Engineer at Velsera, where key tasks involved conducting application security testing and collaborating with engineering teams to address vulnerabilities, as well as Security Engineer - Penetration Tester at Seven Bridges, focusing on planning and executing manual penetration tests. Earlier experience includes a position as a QA Engineer at Fincore Ltd.