Julen Castañeda Nuin (born 14 November 1990) is a Spanish footballer who plays for Zamora as a left-back.
Born in San Sebastián, Gipuzkoa, Castañeda played youth football with local Real Sociedad.
On 14 July 2013, Castañeda signed a two-year deal with Segunda División club SD Ponferradina.
[2] Castañeda scored his first goal in the competition on 9 November 2014, his side's second in the 3–3 home draw with Recreativo de Huelva.
[3] He was released in 2015, and subsequently resumed his career in the third division by representing Burgos CF,[4] Racing de Santander[5] and Cultural y Deportiva Leonesa.