Kyei is a product of the youth academy of
Reims. He made his
Ligue 1 debut on 12 April 2015 against
Nice replacing
Nicolas de Préville after 74 minutes in a 1–0 home defeat. Kyei helped Reims win the
2017–18 Ligue 2 and promote to the Ligue 1 for the
2018–19 season. In August 2018, Kyei joined
Ligue 2 club
Lens on loan for the season with Lens securing an option to sign him permanently. In August 2019, Kyei joined
Swiss Super League club
Servette on a three-year contract. On 31 January 2022, Kyei returned to France and signed with
Ligue 1 side
Clermont until the end of the 2021–22 season. Having suffered relegation with Clermont in 2023–24, on 3 July 2024 Kyei moved to Belgian club
Standard Liège, signing a three-year contract. On 6 September 2024, Kyei was loaned by
Charleroi, with an option to buy. ==International career==