Lukač started his career in the team FK Mladost from Bački Jarak, with whom he competed in Serbian League Vojvodina.

In two years in the Greek club, he played in only one competitive game, on November 5, 2009 against BATE Borisov (2:2) in the group stage of the Europa League.

He started the 2013/14 season as the first goalkeeper of the Black-Whites, playing in the qualification matches for Champions League against Armenian club Shirak and Bulgarian Ludogorets.

In the 146th Eternal derby, on 26 April 2014, Lukač saved two penalty kicks against Red Star, first to Miloš Ninković and then Nikola Mijailović.

[1] Lukač made his international debut for Serbia in a friendly match against Brazil on 6 June 2014, coming on as a substitute for Vladimir Stojković in the 89th minute.