[5] Allende made his senior debut on 13 March 2021, starting in a 0–0 Primera Nacional away draw against Defensores de Belgrano.
[6] On 20 January 2022, Allende moved to Primera División side Godoy Cruz on a one-year loan deal, with a buyout clause.
A regular starter during the 2023 season, Allende scored ten goals during the year, only missing out a few matches due to a knee injury.
[9] On 31 January 2024, Allende signed a four-and-a-half-year contract with Spanish La Liga side Celta de Vigo.
[10] On 14 January 2025, Allende was loaned to Major League Soccer side Inter Miami for their 2025 season.