David Heinemeier Hansson, also known as DHH, is a Danish software engineer, programmer, writer, entrepreneur, and racing driver.

[2] Hansson co-wrote Agile Web Development with Rails with Dave Thomas in 2005 as part of The Facets of Ruby Series.

In 1999, Hansson founded and built a Danish online gaming news website and community called Daily Rush, which he ran until 2001.

During the 2017 24 Hours of Le Mans post-race technical checks, certain irregularities were detected on the Vaillante Rebellion team's #13 Oreca 07-Gibson, resulting in the car's disqualification.

[9] He also commissioned the Koenigsegg Agera HH, which was sold in 2022 to Houston Crosta, a YouTube video creator in Las Vegas.