Aymoz started the 2014–2015 season on the junior level, winning gold at the Lombardia Trophy and bronze at the International Cup of Nice.

He placed fifth on the senior level at the French Championships, held in December, before winning the national junior title in February 2015.

[2] His ISU Junior Grand Prix debut came in late August 2015; he placed fourth at his sole assignment, in Riga, Latvia.

[3] In March, he represented France at the 2016 World Junior Championships in Debrecen, Hungary; he qualified for the free skate by placing fifth in the short program.

On 16 January 2017, the FFSG reported that Aymoz had decided to return to Grenoble and that the federation had sent Katia Krier for the intermediary period.

[7] He took gold at the Denkova-Staviski Cup and finished tenth at his debut Grand Prix event, the 2017 Internationaux de France.

[8] At the 2019 World Championships in Saitama, Japan, he placed eleventh, setting a new personal best in the short program and total score.

Aymoz again began his season on the Challenger series at the 2019 Autumn Classic International, where he won the silver medal with second-place finishes in both segments.

[9] On the Grand Prix, Aymoz competed first at the 2019 Internationaux de France, where a fall on his combination attempt in the short program left him in third place, distantly behind Nathan Chen and Alexander Samarin but only a few points ahead of Shoma Uno.

[11] Aymoz then continued this successful streak by winning silver at the following NHK Trophy and thereby qualifying for the Grand Prix Final.

[17] This proved to be Aymoz's final competition for the season, as the World Championships in Montreal were cancelled as a result of the coronavirus pandemic.

[26][27][28] Aymoz recruited hip hop choreographer Mehdi Kerkouche to work on his programs for the new season, seeing someone from outside the skating world bring an "unexpected" perspective.

Due to a case of athletic pubalgia, he was unable to practice on ice for two months, resuming training three weeks before Master's de Patinage, where he attempted less than his normal technical difficulty and won the bronze medal.

[29] He subsequently attempted to compete at the 2021 Skate America but withdrew after falling on all three jumping passes in the short program, citing his injury.

Competing at the 2022 European Championships, he was tenth in the short program but rose to fourth in the free skate, finishing seventh overall.

[32] Competing at the 2022 Winter Olympics, Aymoz placed tenth in the short program of the men's event, despite tripling a planned quad Salchow jump.

After winning the short program, placing ahead of American rising star Ilia Malinin, he finished second in the free skate and overall.

[38][39] The following week at 2022 Grand Prix of Espoo, he again won the short program over Malinin, despite not yet attempting any quad jumps post-injury.

[44][45] Aymoz finished fifth in the short program at the 2023 World Championships in Saitama, saying that he had entered the competition without any "special goals" as to his placement, adding "I just want to be here and enjoy myself.

[52] Qualifying to the 2023–24 Grand Prix Final, Aymoz finished fifth in the short program, his lone mistake being a foot down on the landing of his triple Axel.

[53] He then returned to France for the national championships in Vaujany, where he came second in the short program, but a "catastrophe" in the free skate saw him tenth in that segment, and drop to seventh place overall.

[57] He was third in the short program; afterward, he said that he was attempting to not succumb to the stress of trying to qualify for the Grand Prix Final, which would be held in his home rink in Grenoble.