Dies Janse was born on January 17, 2006 in Goes and has been playing for Ajax since 2020. On August 11, 2024, Janse made his debut for Ajax’s first team in the season opener at home against sc Heerenveen (1-0). The youth international has so far made six appearances for the senior side.
Director of Football Alex Kroes said: "We extended Dies' contract last summer, and there was no hesitation in renegotiating again. He is a young, talented player with height, who is highly disciplined and eager to learn. A left-footed defender with an excellent passing range. He has made significant progress again this year, and we are fully confident that, with these qualities, he will be of great value to Ajax 1 in the years to come."