Van Hoepen started karting at the age of eight in his native Netherlands, winning a series of national championships before jumping onto the international scene in 2015.[2][3] A protégé of Formula 2 and Formula E champion Nyck de Vries,[4] he won the IAME Euro Series in the X30 Mini class in 2017 and finished in the top ten of both the FIA European Championship and the WSK Champions Cup in OK in 2020, driving for Nico Rosberg's Racing Academy and Charles Leclerc's Leclerc by Lennox Racing respectively.[5][6] For 2021 he remained with Leclerc's team and made the step up to KZ2 shifter karts,[7] finishing third overall in the CIK-FIA Karting European Championship.[8][9]
Formula Regional
Van Hoepen made his racing debut directly in Formula Regional machinery in late 2021, driving for Graff Racing in the Challenge Monoplace category of the Ultimate Cup Series. He hit the ground running, winning his first ever single-seater race from pole at Le Mans, ahead of Formula E race winner and 24 Hours of Le Mans class winner Nico Prost.[10] He would go on to win seven of the nine races he entered—enough to claim 3rd in the championship standings despite having missed the first half of the season.[11][12]
Van Hoepen joined ART Grand Prix for the 2023 Formula 3 post-season testing sessions.[21][22] Following that, he took part in the Macau Grand Prix, finishing tenth, before being confirmed as an ART driver for the 2024 FIA F3 season in December.[23][24] Van Hoepen began the year by fighting for victory at the Bahrain sprint race, losing out to Arvid Lindblad but overcoming teammate Nikola Tsolov to finish second on debut.[25] He scored another sprint race podium at Melbourne, as he finished third following battles with Lindblad and eventual winner Martinius Stenshorne.[26] After continuing his sprint scoring streak on Saturday at Imola, Van Hoepen finished third in the Monaco sprint, having been passed by Tim Tramnitz at the start.[27] He made progress on Sunday, passing Noel León at Mirabeau, before crashing out at Tabac while trying to overtake Joseph Loake.[28] Fifth in the Barcelona and Spielberg sprints in races that included multiple wheel-to-wheel fights preceded Van Hoepen's first feature race points finish of the year — eighth place and a fastest lap in Austria.[29][30][31]
Further points followed on Saturday at Silverstone before Van Hoepen qualified on pole at the Hungaroring, benefiting from a late red flag which came out before many of the other contenders could set a lap time.[32] Despite losing the lead to Tsolov on lap 1, Van Hoepen crossed the line in second; however he would be disqualified due to his car being underweight, which was later revealed to have been caused by a water radiator leak.[33][34][35] Van Hoepen scored more points in the sprint at Spa and the feature in Monza, where he had risen from 29th on the grid owing to an accident in qualifying caused by Kacper Sztuka to 13th and eighth in the two races.[36][37] This meant that he finished 13th in the championship, behind more experienced teammates Tsolov and Christian Mansell.[38]
Van Hoepen remained at ART Grand Prix for the 2025 season, in what is to be his fourth consecutive year with the French team.[39]