Competing in March at Junior Worlds, Pesendorfer qualified for the free skate after placing thirteenth in the short program.

[1] Pesendorfer sat out the 2018–19 ISU Junior Grand Prix series, competing only at the 2018 Golden Bear of Zagreb and 2018 Skate Celje in the fall.

Making her debut in international senior competition, she competed at three events on the Challenger series, placing ninth at Nebelhorn Trophy, eleventh at the Nepela Memorial, and fifteenth at the Golden Spin of Zagreb.

[7] Debuting at the 2020 CS Nebelhorn Trophy, an event attended only by European skaters due to pandemic-related travel restrictions, Pesendorfer placed twelfth.

Going on to compete at the 2023 CS Budapest Trophy, Pesendorfer placed fourteenth in the short program but withdrew prior to the free skate.

[10] In August 2024, it was announced that Pesendorfer had left her longtime coaches, Denise Jaschek and Markus Haider, and moved to Oberstdorf, Germany, to train with Niko Ulanovsky and Ria Schiffner.

[11] Beginning the season at the 2024 Trophée Métropole Nice Côte d'Azur in mid-October, Pesendorfer finished fourteenth.