Career
Born in Cascante, Navarre, Remiro joined Athletic Bilbao"s youth setup in 2009, aged 14. He made his debuts as a senior with the farm team in the 2012-2013 campaign, in Tercera División. On 26 May 2014 Remiro was promoted to the reserves in Segunda División B. He was named first-choice after the departure of Kepa Arrizabalaga in January, and finished the season with 23 appearances as the B-side returned to Segunda División after a 19-year absence.
Remiro made his professional debut on 24 August 2015, starting in a 0–1 home loss against Girona Football Club.