Debrecen has signed 21-year-old Bulgarian goalkeeper Plamen Andrejev on a three-year contract. The youth international arrives from the Dutch club Feyenoord. Andrejev started his career with Levszki Szófia before moving to Holland at the age of 19, and subsequently had loan spells with Racing Santander in Spain and Lech Poznan in Poland. He joins Debrecen seeking more playing time, as he made just one league appearance for Lech Poznan during the 2025/2026 season. His contract with Feyenoord was set to expire in June 2029. His current valuation, according to Transfermarkt, is €1.50m. Feyenoord originally signed him in August 2024 for a reported fee of €1.2 million. His recent loan to Lech Poznań included a buyout option with a reported value of between €800,000 and €900,000 in April 2026.