[2] He joined Bedford School for sixth form, captaining their rugby 1st XV before linking up with Saints' Senior Academy in 2015.
[3] In 2016 Furbank played for Saints in the Singha Premiership Rugby Sevens Series campaign, and in 2017 he signed an extended contract with the Midlands side.
[4][5] In November 2017 Furbank made his club debut and scored his first try for Northampton in an Anglo-Welsh Cup game against Exeter Chiefs.
[7] Furbank scored two tries in a 2023–24 European Rugby Champions Cup pool stage game against RC Toulon and later in that campaign started in their semi-final elimination against Leinster.
[8][9] At the end of that season he started in the 2023–24 Premiership Rugby final as Northampton defeated Bath to become League champions.