Born in Albal, Valencian Community, Ruiz was a product of Valencia CF's youth system. He made his senior debut with the reserves when he was only 16, playing 19 Segunda División B games in 2011–12 and scoring one goal, in the 2–0 home win against CE Manacor. He appeared in his first official match with the first team on 28 November 2012, featuring the full 90 minutes in a 3–1 home win over UE Llagostera for that season's Copa del Rey.