From the 2017/18 season, Fernández played in the second team of FC Barcelona in the second Spanish league. For the 2020/21 season, the Spanish first division club Frigoríficos Morrazo signed him.[2] For the team from Cangas, the left winger scored 130 goals in 34 games in his first season and was voted into the league's All-Star team.[2] In the 2021/22 season, he improved his rate to 147 goals in 30 appearances and was again named the best left winger.[3]
For the 2022/23 season, Fernández signed a three-year contract with the German Bundesliga club TVB Stuttgart, which was coached by his former coach in Barcelona, Roi Sánchez.[2] He signed a contract with FC Barcelona in March 2024 for the 2025/2026 season.[4]