[2] He also joined the first team, staying on the bench as an unused substitution in 6 fixture match of the 2016–17 Serbian First League season, against Inđija.
[8] He made his professional debut in last fixture of the 2016–17 season at the age of 16, under coach Zoran Govedarica, replacing Nemanja Jevrić in 80 minute of the match against Spartak Subotica, played on 21 May 2017 at the Subotica City Stadium.
Turning an adult in summer same year, Župić extended the deal with the club, penning his first four-year professional contract until 2022.
[11][12][13] Following the contract extension, Župić moved on loan to the Serbian League Vojvodina side Cement Beočin.
[14][15] Župić made his debut in an official match for Cement on 16 September, in a draw against Železničar Pančevo, and kept clean sheet.