Jong Ajax
Van den Boomen began the 2013–14 season playing for Ajax A1, the under-19 team, playing in the Nike A-Juniors Eredivisie. He also competed in three matches in the UEFA Youth League while scoring once against AC Milan U19, which earned him a berth with the club's reserves squad Jong Ajax competing in the Eerste Divisie, the 2nd tier of professional football in the Netherlands. He made his debut for Jong Ajax on 11 November 2013 in a match against De Graafschap, coming on as a substitute in the 63rd minute for Wang Chengkuai who also made his debut in the same match. The match ended in a 2–1 loss at home for Jong Ajax. He scored his first professional goal in an away match against SC Telstar, scoring in the 3rd minute of the 3–1 loss. In January 2014 it was announced that Van den Boomen had officially been promoted to the Jong Ajax squad, and would not return to the club's youth ranks.