David Heinemeier Hansson is a Danish programmer, writer, entrepreneur, and racing driver, widely known as the creator of Ruby on Rails, a web framework written in Ruby. He is a partner and Chief Technology Officer at the web-based software development firm 37signals, which developed products like Basecamp and HEY. He is also a New York Times best-selling author, having co-written books such as "REWORK," "It Doesn't Have to Be Crazy at Work," and "REMOTE.