Guridi scored his first professional goal on 10 October 2015, netting a last-minute equalizer in a 1–1 home draw against the same opponent.[3] The following 10 February, he renewed his contract until 2018.[4]
Guridi made his first team – and La Liga – debut on 18 March 2017, starting in a 1–0 away loss against local rivalsDeportivo Alavés.[5] Ahead of the 2017–18 season, he was definitely promoted to the main squad.
Guridi scored his first professional goal on 3 November 2019, netting his team's first in a 4–2 loss at Elche CF, and was a regular starter as Mirandés avoided relegation.
Loan to Mirandés
In January 2019, Guridi was loaned to CD Mirandés, achieving promotion from the third division at the end of the season.[6] His loan was extended for the entire 2019–20 campaign.
Return from loan
Upon returning from loan, Guridi was assigned to the main squad in the top tier, and scored his first goal in the category on 22 May 2022, netting his team's only in a 2–1 home loss against Atlético Madrid.