Career
Helmi began his career with of the Brunei Premier League. He moved to Animal Husbandry United for the 2007-2008 season, and the following year was selected to play for Brunei"s sole professional club, DPMM Football Club. He went back to on loan for the two seasons the Fédération internationale de football association ban on Brunei was in effect. After the appointment of Steve Kean, Helmi only made 5 appearances in the 2014 South.League.
Kean converted him to a right-sided full-back in the following season to help him gain more playing time.
Helmi was with the Brunei under-21s that competed in the 2007 Hassanal Bolkiah Trophy. He made his full international debut for the Wasps in a 0-1 loss against the Philippines on 13 May 2008 for the 2008 AFC Challenge Cup qualification.
He scored his first international goal against Cambodia in the group stage of the 2012 AFF Suzuki Cup qualification.