By profession, Andrade was a government employee at the Ministry of Finance and began his political career in his teens upon joining at 14 the youth wing of the Radical Republican Party.

He was a known supporter of the Bolshevik Revolution and the Communist International, and collaborated from 1917 with Nuestra Palabra, a weekly pro-Communist journal, to print articles in Renovacion that were more left-leaning than the doctrines of the PSOE.

Andrade was an active participant in the April 15, 1920, founding of the Spanish Communist Party, created by the JSE (which continued, in an initially smaller form).

Andrade was elected a founding member of the new party's Executive Committee, and became inaugural editor of its official newspaper, El Comunista.

Many founders of Spanish communism, including Maurin and the very own Andrade, met again at the POUM such as Andreu Nin, Julian Gorkin, Luis Portela and Daniel Rebull, among others.