In the summer of 1989, Mihtarski signed for PFC Levski Sofia, netting 24 times in his debut campaign and winning one Bulgarian Cup during his two-year spell.

Subsequently, he joined FC Porto in Portugal, being barred by countryman Emil Kostadinov for most of his stay and also being loaned twice to fellow Primeira Liga side F.C.

[1] Mihtarski moved abroad again in January 1996, going on to spend the bulk of the following two seasons without scoring, including for both RCD Mallorca in Spain and VfL Wolfsburg, with both teams in their respective countries' second division.

[3] Barred by the likes of Kostadinov, Luboslav Penev, Nasko Sirakov and Hristo Stoitchkov, Mihtarski only earned eight caps for Bulgaria national team in six years (no goals), his debut coming on 28 April 1988 against Denmark.

[3] He was part of the team that reached the semi-finals of the 1994 FIFA World Cup in the United States, but his input in the competition consisted of one minute in the penalty shootout win against Mexico in the round-of-16.