A former Australian representative indoor volleyball player, Harden began playing rugby union at age 19.[1] She played for Sunnybank and Queensland before switching full-time to rugby league in 2018.[2][3]
In May 2019, she represented South East Queensland at the Women's National Championships.[13] On 29 June 2019, she signed with the Sydney Roosters NRLW team and was named their Player of the Year at the end of the season.[14][15]
In October 2019, Harden represented Australia at the 2019 Rugby League World Cup 9s and earned a recall to the Jillaroos Test side after a four-year absence, coming off the bench and scoring a try in a 28–8 win over New Zealand at WIN Stadium.[16][17]
In September 2020, Harden re-joined the Brisbane Broncos NRLW side.[18] On 25 October 2020, she started at second-row and scored a try in the Broncos' 20–10 Grand Final win over the Roosters.[19]
On 11 May 2023, Harden signed for the North Queensland Cowboys on a one-year contract.[21] On 28 June, she was named as the inaugural co-captain of the Cowboys, alongside Kirra Dibb.[22]