The young goalkeeper joined Athletic Club in 2018-19 from Antiguoko. A confident shot stopper and strong in the air, Julen stands out most for his quick reflexes.

After playing for the Under 17s and Basconia, the goalkeeper quickly moved up to Bilbao Athletic. He has played a total of 14 games for the reserves, and thanks to some fantastic performances, he was rewarded with a new contract until June 2025. This summer he spent his first pre-season with the senior side.