After unsuccessfully emerging through Real Sociedad's youth ranks and playing with amateurs SD Beasain, Jandro started his professional career with local SD Eibar also in the Basque Country, often playing as a forward.
After failing to advance through Real Sociedad's youth system and playing with amateur teams like SD Beasain, Jandro began his professional career at SD Eibar, which is situated in the Basque Country. He frequently played as a forward.