MARK OTTO
Currently designing at GitHub. Creator of Bootstrap. Previously at Twitter. Huge nerd.
http://markdotto.com/
https://twitter.com/mdo
CONNOR SEARS
Co-creator of Ratchet. Currently at GitHub helping create a better way to design, build, and ship software. Previously at Pinterest, Twitter, and ZURB.
http://connor.town/
https://twitter.com/connors