John Riviello created his first hypertext document on the Internet in 1996 and has been obsessed with building for the web ever since. He spends his days as Distinguished Engineer and Lead Front-end Developer at Comcast, where he works on the Xfinity customer websites and web applications. He is fortunate to have made the transition from Individual Contributor to Technical Lead to Manager to Lead Developer at the same company. He is also the author of the course "CSS to Sass: Converting an Existing Site." In his free time, he prefers surfing waves over surfing the Internet.