Dobrev made his debut for the team on 16 October 2016 in league match against Vitosha Bistritsa.[4] He completed his professional debut in the First League on 27 August 2017 in a 4:1 win over Cherno More.[5]
On 10 September 2019 he signed for Spartak Varna, on loan from Septemvri until end of the season. [6]