Coming through the Arsenal academy, Filis made her senior debut for the Gunners on 6 December 2018 as an 82nd minute substitute during a 5–0 win over
Charlton Athletic in the
2018–19 League Cup group stage. She made her
FA WSL debut on 27 January 2019 against
Reading Women at
Adams Park, entering as a 93rd minute substitute and providing an assist for
Katie McCabe 22 seconds later to seal a 3–0 victory. Filis' only Arsenal goals came when she scored a
hat-trick during a 9–0 win over
London Bees in the
2019–20 League Cup group stage. On 4 September 2020, Filis signed for
FA Women's Championship side
London Bees. On 2 July 2021, Filis signed for
West Ham United. On 10 January 2024, Filis signed for Charlton Athletic on loan until the end of the 2023–24 season. On 12 July 2024, Filis was announced at Charlton Athletic on a two year contract. On 1 June 2025, it was announced that Filis would depart Charlton, having reached a mutual agreement with the club to leave a year before the expiry of her contract. Filis was announced at Italian club
Sassuolo on 25 July 2025. ==International career==