About us

AdShops increase your advertising revenue.

Sternzeit Media is a privately owned company with more than 15 years of experience in buying and selling online advertising space. We’re customer focused and flexible, providing our clients with tailor-made solutions such as our innovative AdShop.

We have extensive knowledge of all the processes involved in online ad sales, starting with the insertion order and ending with accounting. Using this knowledge, we create future-proof software solutions that meet our customers’ requirements.


  • Michael keuntje sternzeit

    Michael Keuntje

    Founder & Managing Director

  • Ossip kaehr

    Ossip Kaehr

    Chief Technology Officer

  • Katja dodt sternzeit

    Katja Dodt

    Senior Online Marketing Manager

  • Cem celik sternzeit

    Cem Celik

    Senior Product Manager

  • Christian herrmann sternzeit

    Christian Herrmann

    Online Media Product Manager

  • You sternzeit

    Your unsolicited application

    Read more about working at Sternzeit ›