Ludvig "Ludde" Strigeus (born 15 January 1981) is a Swedish programmer, best known for developing software such as the BitTorrent client üTorrent, OpenTTD, and Spotify.
Strigeus was born in January 1981, and he graduated from Chalmers University of Technology with a master's degree in computer science and engineering.
He currently works as a software engineer at Spotify. In 2005, his development team won PuzzleCrack, a week-long puzzlehunt competition that combines problem-solving with computer hacking.
Ludvig Strigeus was awarded the 2006 John Ericsson () Medal, the 2011 ', 2015 honorary doctorate, and the 2020 Polhem Prize. In 2023 Ludvig was elected fellow of the Royal Swedish Academy of Engineering Sciences
He currently resides in Gothenburg, Sweden. Due to a rare muscular disease, Strigeus uses a wheelchair.