[3] Aminuddin was added to the local contingent of the DPMM FC squad for the 2015 S.League season in February 2015 along with Reduan Petara, Yura Indera Putera and Khairul Anwar Abdul Rahim.
[5] After managing only a single league appearance in 2017 (which was a 9–3 drubbing by Home United on 25 May), Aminuddin was released in the close season.
[6] Aminuddin joined Indera SC shortly after and scored in the semi-final of the FA Cup against Kasuka FC in March 2018.
[10] He was included in the squad for the 2012 AFF Suzuki Cup qualification and scored his first international goal against Cambodia in a 3–2 win,[11] making him one of the youngest goalscorers for Brunei's senior national team.
After five years away from the full national team, Aminuddin made the selection for AFF Suzuki Cup qualifying matches against Timor-Leste in early September 2018.