She won 10 metre air pistol event at the 2010 World Shooting Championships and was later named Serbian Sportswoman of The Year by the Olympic Committee of Serbia.

She won Serbia's first ever gold medal in shooting at the Olympics in 2024 with Damir Mikec in the 10 meter air pistol mixed category.

Arunović made breakthrough in 2010, when she won individual gold medal in 10 m air pistol, and both individual and team silver in 25 m pistol, alongside her sister Jelena and legendary sports shooter Jasna Šekarić, at the 2010 World Shooting Championships in Munich.

The win also made her the first woman athlete to secure quota for Serbia for the London 2012 Summer Olympics.

Arunović won individual bronze medal in 10 m air pistol at the 2022 World Shooting Championships in Cairo, to secure first quota for Serbia for the Paris 2024 Summer Olympics,[3] just as she did for the previous Olympic Games, when she qualified by winning individual silver medal at the 2018 World Shooting Championships.