Plamen Andreev

Levski Sofia

On 23 May 2021, Andreev made his senior debut for Levski Sofia at the age of 16, entering during the last 10 minutes of the final game of the season against Cherno More. He was the starting goalkeeper and captain throughout the 2021–22 Bulgarian Cup won by Levski, conceding only two goals and keeping five clean sheets across all six games. In August 2022, Andreev was placed 22nd in a CIES ranking for most promising 2004-born players worldwide.

Feyenoord

On 31 August 2024, Dutch club Feyenoord announced the signing of Andreev on a five-year contract.

Loans to Racing Santander and Lech Poznań

On 29 July 2025, Andreev was loaned to Spanish second division club Racing Santander. He made five appearances in all competitions before having his loan cut short on 6 January 2026. On that day, he joined Polish Ekstraklasa club Lech Poznań on loan until the end of the season, with an option to buy. His debut came on 19 April 2026 in a league fixture against Pogoń Szczecin. Despite picking up an injury in the second half, he finished the game and made a point-blank save deep into injury time to secure a 2–1 win for his side. This turned out to be Andreev's sole appearance for Lech during their championship-winning season. He left the club in June 2026.

Debrecen

On 19 June 2026, Andreev moved to Hungarian Nemzeti Bajnokság I club Debrecen on a three-year contract.

As of match played 28 August 2026

Levski Sofia

Bulgarian Cup: 2021–22 Lech Poznań

Ekstraklasa: 2025–26 Individual

Bulgarian First League Best Goalkeeper: 2022–23, 2023–24 Bulgarian First League Best Young Player: 2022–23