Daniel Stein earned his Bachelor of Business Administration in 1994 from Schiller International University.

He started his career as marketing manager for various Berlin multimedia companies, among others for the renowned publisher Axel Springer's online service. He then worked as consultant for various Internet and IT projects. In 1998, Daniel joined www.berlin.de as content manager where he also became responsible for all of berlin.de's eCommerce activities, especially for acquisition and key account management of Amazon, DooYoo, and Ebay.