In September 2007, Stoyanov was banned for one year from football after an incident with a linesman in a match against Kaliakra Kavarna following his dismissal from the field by the main official.

On 30 July 2009, Stoyanov marked his official debut for the armymen by scoring the goal for the 1:0 home win against Northern Irish side Derry City F.C.

[4] On 25 February 2010 Russian side Alania Vladikavkaz signed the Bulgarian international from CSKA Sofia, the midfielder agreed to a three-year deal for $1.2 million.

[7] On 28 November 2011, Stoyanov scored another last-minute goal, this time against former club CSKA Sofia, to help Ludogorets secure a 2:2 away draw and enable the team from Razgrad to finish the first half of the A PFG season in first place in the standings.

[8] On 2 April 2012, he netted the only goal for his team in the 1:0 away win over Levski Sofia, helping Ludogorets put an end to a three-game losing streak.

On 24 July 2013, he opened the scoring in the 3:0 home win over Slovak side Slovan Bratislava in a 2nd qualifying round UEFA Champions League match.

Stoyanov saw less first team action during the 2013/2014 A PFG season due to the strong performance of the other forwards and rejoined CSKA Sofia in February 2014.