Vieites was promoted to the reserves ahead of the 2018–19 season, but was only a third-choice. He became a regular starter in 2019–20, contributing with 15 appearances as the league was curtailed due to the COVID-19 pandemic.
On 1 July 2022, Vieites terminated his contract with Lugo,[5] and signed a two-year deal with Real Betis' reserves in Segunda Federación.[6] He made his first team – and La Liga – debut with the Verdiblancos on 16 September 2023, replacing injured Rui Silva in a 5–0 away loss to FC Barcelona.[7]
On 19 February 2024, Vieites renewed his contract with the Verdiblancos until 2026, being definitely promoted to the main squad for the 2024–25 season.[8]
National team
On 31 May 2024, Vieites played in the second half of the Galicia national team friendly against Panama, which was Galicia's first match in eight years.