[2] Born in Haskovo, Temenuzhkov emigrated to Fraga, Spain, with his parents and four elder siblings at the age of a year and half.
[3][4] He started his youth career in local teams, before joining Barcelona in 2014 after being recommended by former Spain international Guillermo Amor.
[9] He made his professional first team debut on 6 January 2019 during a 2–1 defeat to Queens Park Rangers in the third round of the FA Cup, as a 79th-minute substitute for Tom Pearce.
[citation needed] On 5 August 2020, after Leeds' promotion to the Premier League,[14] Kun joined Spanish Segunda División B – Group 2 side Real Unión on loan until the end of the 2020–21 season.
[17] In August 2022 Leeds United confirmed that Kun was released by mutual consent and he had joined Spanish fourth tier side CDA Navalcarnero.