Born in La Rinconada, Province of Seville, Muñoz relocated to Barcelona at the age of 3 due to his father's construction work.

He graduated in Economic and Business Sciences from the University of Málaga,[1] where he began to affiliate with left-wing politics, joining the Spanish Socialist Workers' Party (PSOE) in 1983.

[2][1] In June 2021, mayor Juan Espadas became the PSOE candidate for President of the Regional Government of Andalusia, resigning his local office in December.

[4] The PSOE were defeated in the 2023 Seville City Council election, with José Luis Sanz of the People's Party becoming mayor.

[5] During the local election, Sanz campaigned against Muñoz by linking him to the PSOE prime minister of Spain, Pedro Sánchez.