Yuguang Zhang has worked as a web developer in a number of small companies. Notable companies where he has worked at include SociaLabra, a social media company, and SmartPager, a startup in mobile paging. He has expertise in developing interactive client-side applications with Knockout. As a personal project, he built the first IDE that runs Python in the browser using Knockout and jQuery UI, that is pythonfiddle.com. In addition, he designed and programmed fiddlesalad.com, a multi-language playground for rapid frontend development built with CoffeeScript and Django.