He previously played for the Manly-Warringah Sea Eagles, Penrith Panthers, New Zealand Warriors and North Queensland Cowboys in the NRL and the Warrington Wolves in the Super League.

[citation needed] Hiku played his junior football for the Manurewa Marlins and represented the Counties Manukau Stingrays in the National Competition.

[3] Hiku played for the New Zealand Warriors' under-20s team in 2012, and had the second most metres gained during the 2012 NYC season behind teammate Ligi Sao.

[9][10] On 13 May 2014, Hiku re-signed with Manly to the end of the 2017 season after the Canterbury-Bankstown Bulldogs offered him a contract who were searching for a fullback to replace the departed Ben Barba.

[11] Hiku, who expressed his desire to stay with Manly-Warringah, also reportedly turned down a one million dollar contract to return to the New Zealand Warriors despite the opportunity to be closer to his family.

[18] He retained his spot in the New Zealand team for the 2015 Anzac Test, though he was moved to the centres as the Kiwis continued their Four Nations form with a 26-12 win over Australia at Suncorp Stadium.

[30] Hiku was set to miss a month of footy but returned early in Round 3 against the Sydney Roosters where he came off the interchange bench in the 14-12 loss at Penrith Stadium.

[31] On 19 June 2017, Hiku was released from his contract mid-season from the Penrith club to join the Warrington Wolves in the Super League after he was going behind in the pecking order for the centre and wing positions.

On 9 October 2017, Hiku was granted a released from Warrington on compassionate grounds to sign with the New Zealand Warriors on a three-year deal, starting from 2018.

[35] In Round 1 of the 2018 NRL season, Hiku made his club debut for the New Zealand Warriors against the South Sydney Rabbitohs, playing at centre in the 32-20 win at Perth Stadium.

[40] In round 2 of the 2023 NRL season, Hiku was placed on report for a crusher tackle during North Queensland's loss to arch-rivals Brisbane.

[43] On 12 October 2024, Hiku played in Hull Kingston Rovers 2024 Super League Grand Final loss against Wigan.