Malmö FF On 8 January 2020, Sejdiu signed his first professional contract with
Allsvenskan side
Malmö FF after agreeing to a one-season deal and received squad number 36. His debut with Dalkurd came on 16 June in a 0–0 away draw against
Akropolis after coming on as a substitute at 74th minute in place of
Arian Kabashi.
Return from loan Sejdiu returned to Malmö at the beginning of the
2021 season, but without being able to play due to
knee injury. On 20 November 2021, he was named as a Malmö substitute for the first time in a league match against
Häcken. His debut with Malmö came on 26 February 2022 in the
2021–22 Svenska Cupen group stage against
Ängelholm after coming on as a substitute at 84th minute in place of
Veljko Birmančević.
Loan to NAC Breda On 10 August 2023, Sejdiu moved on a new loan to
NAC Breda in the Netherlands, with an option to buy.
Loan to Roda On 9 July 2024, Sejdiu returned to the Netherlands and joined
Roda JC on a season-long loan. He made his debut for the club on 12 August, coming on for
Arjen van der Heide in the 59th minute of the season's opening fixture against
Jong AZ. He missed a penalty shortly after, and the team suffered a heavy 6–1 defeat. He left the club upon the expiry of his loan at the end of the season.
Loan to Östers On 23 June 2025, Sejdiu joined
Östers IF on a loan-deal for the rest of
2025-season. ==International career==