By TVN Staff | April 14, 2021 | 7:28 a.m. ET. Kubient, a cloud-based software platform for digital advertising, today named digital advertising industry veteran Leon Zemel as its new chief product officer. Most recently the senior vice president of programmatic and platform product at DoubleVerify, Zemel joins Kubient with more than 15 years as a product innovator and business leader in the ad tech industry. Zemel led the development of one of the first demand side platforms (DSPs) and data management platforms (DMPs) in the industry at x+1, where he was a key senior executive responsible for scaling its technical products before it got acquired for $230MM.