Instituto Born in
Mina Clavero,
Córdoba, Allende began his career with hometown side CA Juventud Unida before joining
Instituto's youth sides in 2017; initially a
striker, he would progress in the youth categories as a
winger. In March 2021, he signed his first professional contract with the latter club, being promoted to the first team. Allende made his senior debut on 13 March 2021, starting in a 0–0
Primera Nacional away draw against
Defensores de Belgrano.
Godoy Cruz On 20 January 2022, Allende moved to
Primera División side
Godoy Cruz on a one-year loan deal, with a buyout clause. He made his debut in the category on 11 February, starting in a 1–1 home draw against
Tigre. On 14 June 2022, Godoy Cruz bought 50% of Allende's economic rights for a rumoured fee of
US$ 300,000, with Allende signing a contract until 2026. He scored his first professional goal on 2 July, netting the winner in a 1–0 home success over
Colón. 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.
Celta On 31 January 2024, Allende signed a four-and-a-half-year contract with Spanish
La Liga side
Celta de Vigo.
Inter Miami On 14 January 2025, Allende was loaned to
Major League Soccer side
Inter Miami for their 2025 season. He emerged as one of the leading offensive players for Miami, finishing the regular season with 11 goals and one assist, often starting along
Lionel Messi and
Luis Suárez. In the
MLS Cup Playoffs, he set a postseason record with nine goals and finished as the tournament's top goalscorer as the team went on to win the
MLS Cup. He did return to Celta Vigo initially after his loan expired. On 26 January 2026, Allende signed for Inter Miami permanently, after a successful loan deal. ==Personal life==