Hailing from Aluva, he made his acting debut in the 2015 film Mumbai Taxi in a minor role.

[3] Sajin made his big screen debut in 2015 with Mumbai Taxi where he played a minor role.

Gopu's role of the jeep driver in Lijo Jose Pellissery's Churuli in 2021 became a turning point in his career.

[7] Sajin received much critical praise for his role as Ambaan in Jithu Madhavan's gangster action comedy Aavesham.

[8] Vignesh Madhu of The New Indian Express wrote, "Ranga’s right hand man is Ambadi, who he fondly—and funnily—calls Ambaan.