In June 2001, Stanislav made a hugely controversial move to CSKA's bitter rivals Levski Sofia.

On 13 June 2007, the German club Energie Cottbus officially announced they have signed the player for three years until 2010.

That was followed by an immediate reaction from Levski, who denied any such deal, and stated that Angelov was still their player and that he had acted incongruently with the terms of his current contract.

[4] On 4 January 2011, Angelov signed a one-a-half-year deal with Cyprus side Anorthosis Famagusta.

Angelov made his competitive debut for Anorthosis on 8 January in a 2–0 home win against APOEL.

On 19 May 2013, he scored a last-minute goal against Ludogorets Razgrad in a crucial derby encounter to put the "bluemen" temporarily in first place in the A PFG standings, but Levski Sofia subsequently failed to win the title, as they were held to a 1–1 draw in their next match against Slavia Sofia.