Stefan Greffenius

Stefan Greffenius is a seasoned software engineer with extensive experience primarily in Ruby on Rails and full-stack development. Currently serving as a Senior Full Stack Engineer at Caspar Health since April 2022, Stefan previously held various senior roles, including Senior Ruby Developer at Memsource and Team Captain overseeing a team of engineers. Expertise encompasses API integrations, subscription and payment systems, and automated testing. Stefan's background also includes significant contributions at ad2games and sofatutor GmbH, where responsibilities ranged from infrastructure maintenance to code quality assurance. Early career efforts included roles at Dealgecco GmbH and Rebate Networks, focusing on web development and IT system administration, complemented by a Bachelor of Science in Medieninformatik from FH-Brandenburg.