On 13 October 2017, Sadiku signed his first professional contract with Superettan side Varbergs BoIS after agreeing to a three-year deal.[2] On 19 June 2018, he made his debut in a 3–3 home draw against Helsingborgs IF after coming on as a substitute at last minutes in place of Adama Fofana.[3]
On 1 August 2022, Sadiku signed a three-and-a-half-year contract with Superettan club Örgryte.[6] Sadiku missed Örgryte's first matches of the league against AFC Eskilstuna and Örebro as the club could not register him and five days after the transfer, he was registered.[7] His debut with Örgryte came on 13 August in a 1–2 away win against Dalkurd after being named in the starting line-up.[8] Fourteen days after debut, Sadiku scored his first goal for Örgryte in his third appearance for the club in a 1–1 away draw over Västerås in Superettan.[9]