David Heinemeier Hansson

David Heinemeier Hansson (DHH) is a Danish programmer, entrepreneur, and writer who serves as CTO and co-owner of 37signals, the software company behind Basecamp and HEY. He is best known as the creator of Ruby on Rails, the open-source web framework he extracted from Basecamp in 2003 and released in 2004. He is also a Le Mans class-winning racing driver, a board member of Shopify since November 2024, and the co-author of several business books including the bestseller REWORK.