Păun spent most of his professional career at his boyhood club CFR Cluj, for which he made his debut in 2014 and appeared in over 230 league games. In 2022, he moved abroad for the first time by signing for Hapoel Be'er Sheva on an initial loan, and also played for Bnei Sakhnin, before returning to CFR Cluj two years later.
Internationally, Păun made his first—and only—appearance for Romania in June 2021, in a 0–1 friendly loss to England.
Club career
Păun recorded his Liga I debut for CFR Cluj on 14 March 2014, in a 2–2 away draw with Corona Brașov. He scored his first goal for the team on 28 April 2015, in a 2–1 home victory over Concordia Chiajna.[5]
On 28 September 2022, Păun joined Israeli club Hapoel Be'er Sheva on a season-long loan with an option to buy.[6] On 15 November that year, it was announced that he signed for Be'er Sheva on a permanent deal until 2026.[7]
On 20 September 2023, Hapoel Be'er Sheva sent Păun on a season-long loan to fellow Israeli Premier League side Bnei Sakhnin, with the player's salary being split between the two clubs.[8]
^Some sources incorrectly give out his first name as being "Alexandru" and his surname as the single "Păun".[2] His actual surname is the double "Alexandru Păun",[3] in spite of the fact that children in Romania typically only take on their fathers' family names.