Jeff co-founded Stackexchange, a question-and-answer network that is collaboratively built and maintained by users, and is one of the most well-known and highly trafficked sites on the Internet. The site utilizes an earnable privileges reputation system, with the ultimate goal of the site being to cull good answers “to every imaginable programming question.” Jeff began his professional efforts in technology as a software developer, working various implementations of Microsoft's BASIC in the 1980’s. Fascinated by the human side of software development, Jeff blogs about just that and more on his popular blog Coding Horror.