Born in Blagoevgrad, Tasev is a product of the Pirin 2001 academy. On 30 August 2013, he joined Pirin Blagoevgrad and made his senior debut two days later, coming on as a substitute against Velbazhd Kyustendil at Osogovo Stadium in a game of the third division.[2] Tasev scored his first goal in a 3–0 away win over Sportist Svoge on 29 September.
Botev Plovdiv
On 7 June 2017, Tasev signed a 2-year contract with Botev Plovdiv as a free agent.[3] On 29 June Tasev made an official debut for Botev Plovdiv during the 3–1 away win over Partizani Tirana in the 1st qualifying round of UEFA Europa League.[4] On 6 June 2018, Tasev, who had been on loan at Montana during the spring, was released from Botev Plovdiv.[5]
On 7 March 2016, Tasev was called up for the first time to the Bulgaria national team for the friendly matches against Portugal and against Macedonia,[7] but did not debut.