Kovachev started his career in his hometown in the youth teams of Beroe Stara Zagora.
After a year there, he returned to Bulgaria after he caught the eye of the CSKA Sofia scouts and signed with "The Armymen".
He made his debut with CSKA in the last game of the 2008–09 season in the Bulgarian "A" Professional Football Group, which was a match against Lokomotiv Mezdra.
In June 2009 Kovachev returned to his first club, signing a contract for two years.
This biographical article related to association football in Bulgaria, about a defender, is a stub.