Prior to taking up Australian rules football, Rajcic had previously played soccer with Adelaide United in the Australian W-League.[2] Prior to that she had played fully professionally for Gustafs GoIF in the Elitettan for the 2012 season,[3][4] and played for Box Hill United in the Victorian Women's Premier League when she returned to soccer after knee surgery.[5][6] She considers captaining Adelaide United in 2015 the best achievement in her soccer career.[7]
In 2020, Rajčić competed on The Amazing Race Australia 5 with Chelsea Randall as a "stowaway team".[12] In post-show interviews, the two revealed that they had started dating before filming began.[13] The pair announced their engagement on 5 March 2023 and the birth of their son on 29 October 2023.[14][15] Rajčić is of Croatian descendant.