[2] Giubellini competed at the 2022 European Youth Olympic Festival and won a bronze medal with the Swiss team.

[3] In the event final, he was placed fourth on the floor exercise and still rings, sixth on the vault, seventh on the pommel horse, and eighth on the parallel bars.

[4][5] He then competed at the 2022 Junior European Championships, helping the Swiss team to fourth place.

[10][11] He then competed at the 2024 European Championships alongside his brother Luca, Christian Baumann, Noe Seifert, and Taha Serhani.

[13] Giubellini was selected to compete at the 2024 Olympic Games alongside his brother Luca, Florian Langenegger, Noe Seifert, and Taha Serhani.