MUNICH, Oct 29 (Reuters) - German media company Axel Springer is aiming to list its online jobs site StepStone in Frankfurt at a valuation of around 7 billion euros, a person with knowledge of the matter said on Friday. The listing would take place in the first half of next year, the person added. Axel Springer and StepStone declined to comment on market rumors, but StepStone added: “To further support our sustainable growth, we are constantly reviewing all possible options.” The Financial Times first reported the development. (Reporting by Alexander Huebner in Munich, and Aakriti Bhalla Ann Maria Shibu in Bengaluru; Writing by Tom Sims; Editing by Leslie Adler and Sabine Wollrab)