Server Driven UI (SDUI) is a rapidly growing trend in native app development. Some of the world's most well known companies such as AirBnB, Spotify, Reddit and others have built their own SDUI platforms. In this talk, I will share details of the open source SDUI platform and the design-time that we built at Ensemble and how it can improve dev productivity by 5x while allowing developers to update their native apps in real time across all devices.