David developed an interest in computer programming when he was 11 years old. Instead of finishing high school he started working, and innovating, in the online community. Tumblr is a leading micro blogging and social media tool where creators can upload images, video, audio clips and bursts of text. The site– with more than 50 million creators serving 140 million people monthly– was an outgrowth of David’s own interest in improving his personal online expression. The company was sold to Yahoo in May, 2013 for $1.1 Billion.

David speaks with Jessica Harris about how he built Tumblr, from scratch.

Listen to the interview