On 21 June 2017, Koffi joined Lille on a five-year deal.[4] He made his debut for Lille in a 2–0 Ligue 1 loss to Caen on 20 August 2017.[5]
In the 2019–20 season, Koffi moved to Belenenses SAD on loan, where he played 20 league games despite suffering some minor injuries.[6] The following season, he joined Lille's partner club Mouscron on another loan, where he replaced Jean Butez who had left for Antwerp.[7][8]
On 6 July 2021, Koffi joined Charleroi in Belgium on a three-year contract.[9]