He won the silver medal in the men's 61 kg event at the 2023 European Weightlifting Championships held in Yerevan, Armenia.

[1] Massidda won the gold medal in the men's 55 kg event at the 2019 Youth World Weightlifting Championships held in Las Vegas, United States.

[2][3] At the 2021 European Junior & U23 Weightlifting Championships in Rovaniemi, Finland, he won the gold medal in his event.

[4] Massidda won the gold medal in his event at the 2022 European Junior & U23 Weightlifting Championships held in Durrës, Albania.

In August 2024, Massidda competed in the men's 61 kg event at the 2024 Summer Olympics held in Paris, France.