Mendel Senf is an ad-tech entrepreneur with over a decade’s worth of experience within the online marketing industry. Currently based in Berlin, Mendel co-founded Yieldr - the programmatic display advertising platform - in 2008, his entrepreneurial drive and his experience within audience targeting and optimisation is the force behind the fast international growth of the company. As CRO he is responsible for general management and all commercial operations within Yieldr. Mendel is an advertising industry game changer and evangelist of the power of big data to sell products direct to end users, he holds a degree in Business Administration and previously worked at the performance marketing network, zanox.