She started her skating career competing for her native France at the pre-novice level in 2014, but by 2016 had begun representing Switzerland.

Later in the same month, Mazzara won the silver medal in the junior-level ladies event at the Merano Cup in Italy.

In August 2018, Mazzara made her ISU Junior Grand Prix debut at the 2018 JGP Slovakia in Bratislava, where she finished tenth.

[3] Mazzara was scheduled to make her Grand Prix debut at the 2020 Internationaux de France, but the event was cancelled as a result of the COVID-19 pandemic.

[4] She instead opened her season in early November in Minsk at the 2020 Winter Star where she placed fifth in the short program and third in the free skate to win the bronze medal overall.

[6][7][8] Mazzara began the season at the 2021 CS Lombardia Trophy, where she finished fourteenth, four ordinals, and fourteen points below fellow Frenchwoman Léa Serna.

She later came twenty-second at the 2022 CS Warsaw Cup, and was assigned to represent France at the 2023 Winter World University Games.