Born and raised in Teshie, Adjei started to play youth football with local club Danbort FC at age 13.[2] The team competed in Division One League, Ghana's second tier.[3]
Club career
On 13 August 2021, Ajdei joined Hammarby TFF in Sweden's third tier Ettan, the feeder team of Hammarby IF. He was signed on a one-year loan from Danbort, together with fellow Ghanaian player Emmanuel Agyeman Duah from Karela United.[4][5]
On 11 July 2022, Adjei was promoted to Hammarby's first team, completing a permanent transfer from Danbort by signing a four-and-a-half-year contract.[6] On 17 September the same year, Adjei made his Allsvenskan debut in a 1–1 away draw against BK Häcken, in which he scored an own goal.[7]
On 27 January 2024, Adjei joined Lorient on loan with option to purchase in France until the end of the season.[8]
Adjei was transferred to Lorient upon exercise of the purchase option on 15 June 2024.[9]
He was also part of Ghana's squad in the 2021 Africa U-20 Cup of Nations.[12] He played three games throughout the tournament, before suffering an injury ahead of the knockout stage, that Ghana went on to win through a 2–0 win in the final against Uganda.[13][14]