Joakim Aune made his debut on December 15 and 16, 2012 in Winterberg in the FIS Cup , where he finished 19th and 6th. After this debut, however, it lasted almost two years before entering the next competition. On September 27, 2014, Aune made his debut in the Continental Cup in Trondheim and reached 35th place. Since then, further participation in the competition series has followed regularly. He achieved his best placements in the Continental Cup so far at the competitions in Engelberg on December 27th and 28th, where he finished second and third. These were also his first podium places in the Continental Cup.
In March 2017, Joakim Aune made his debut at Raw Air 2017 in Oslo in the Ski Jumping World Cup , where he took 21st place in the individual competition and thus collected his first World Cup points.
On August 16, 2019, Aune won the Continental Cup competition in Frenštát pod Radhoštěm .