— Natalija Kolar, HR Director Central Europe devoteam GmbH
Great help
— Matthias Jugel, Head of Technology ubirch GmbH
— Stefanie Jarantowski, CEO eventsofa GmbH
Stephan is an extremely knowledgeable, but also open, friendly and helpful person. As a startup mentor, speaker, explainer, and problem solver on any level of IT challenges, he’s indispensable.
— Christoph Räthke, Founder Berlin Startup Academy