Signal is an upcoming conference in San Francisco on May 19th and 20th, designed specifically for developers working with Twilio. The event features a stacked schedule of talks from top technical speakers, including Coleen Coolidge, Daniel Palacio, Lisa Weitekamp, Peter Shafton, Bob Hagemann, Guillermo Rauch, Leah Culver, Philipp Hancke, James Montenegro, Adam Varga, Elliot Gardiner, Kristina Durivage, and Alan Palazzolo. The conference focuses on real technical sessions for working developers, with tracks covering topics such as Twilio's technologies, design patterns, and concepts, as well as practical talks about socket.io, Swift, WebRTC, and more. Additionally, the event features straight talk from the people who built these technologies, including insights into the challenges they faced while building products like Twilio Video. The conference aims to start a conversation with developers, providing them with invaluable wisdom and knowledge on how to build successful communication experiences.