Mendieta started in football by participating in inter-neighborhood tournaments in the Chorrillos District, later going to an academy called "Todos Juntos" where he began his training.
[6] Mendieta's contract with Sporting Cristal expired at the end of 2019 and he then joined Ayacucho on permanent basis.
[8] Ahead of the 2025 season, he then moved to newly promoted Peruvian Primera División side Alianza Universidad.
[9] Mendieta was one of the figures of the Peruvian 15 national team that won the 2013 2013 South American U-15 Championship title in Bolivia.
He was also a part of the U17 national team squad in the 2015 South American U-17 Championship in Paraguay.