Born in Basse-Terre, Guadeloupe,[3] Francillette played youth football for Dijon FCO until he was released in 2018, and signed for sixth-tier side AS Quetigny, initially as a reserve team player before establishing himself in their first team.[4] He was scouted by Newcastle United of the Premier League and signed for their under-23 side in summer 2019.[4][5] He was released by the club in at the end of the 2020–21 season.[6]
Crawley Town
On 5 August 2021, it was announced that Francillette had signed for EFL League Two side Crawley Town on a two-year contract following periods on trial at both Crawley and Portsmouth.[7][8][9] He made his debut for the club on 10 August 2021 in a 2–2 EFL Cup draw with Gillingham and was the only player to miss a penalty in a 10–9 shoot-out defeat.[10][11] He made his league debut a week later in the club's 2–1 win over Salford City.[11] He scored his first senior goal in Crawley's 2–1 win at Newport County on 15 April 2022 with a low strike following a "slick corner routine".[11][12] Francillette made 29 appearances during the 2021–22 season.[11]