Langi previously played for the Sydney Roosters in the NRL, and for the Leigh Centurions and the Catalans Dragons in the Super League, signing from the Penrith Panthers in June 2017.

Playing at centre, Langi made his NRL debut for the Roosters on 19 August 2013, in their round 23 match against the Wests Tigers.

[9] In the 2022 Super League season, Langi made 19 appearances including the clubs upset loss to Leeds in the elimination play off.

[10] Langi played 14 games for Wakefield Trinity in the Super League XXVIII season as the club finished bottom of the table and were relegated to the RFL Championship which ended their 24-year stay in the top flight.

On 7 May 2016, Langi played for Tonga against Samoa in the 2016 Polynesian Cup, suffering a game-ending injury inside the opening 10 minutes.

[15] In 2022, Langi switched his allegiance from Tonga where he represented them on 7 occasions, to play for France at this year's Rugby league World Cup, qualifying through residency.