He is an alumnus of the prestigious Berklee College of Music and holds a postgraduate degree in scoring for films, TV and video games.

He graduated as an IT Engineer from CUSAT, Cochin and later on pursued courses such as CCNP and CCIE in Bangalore ILloka networks, before moving to London.

During this period, he had also composed original themes for many television productions, including shows for Asianet and Amrita TV.

The Mammootty starrer which also had Ravi K. Chandran and Resul Pookutty on board as cinematographer and sound designer respectively was subsequently shelved.

[6] In 2011, Rahul Raj made his debut in Telugu cinema by composing music for the Siddharth – Shruti Haasan starrer Oh My Friend.

[15][16][17][18][19] The year 2015 opened on a favourable note for Rahul, as his background score for the Mammootty starrer Fireman received praise.

The song Hemanthamen went on to rake in unanimous praise from critics and public alike, being hailed as an outstanding nostalgic melody.

[24] The year 2017 opened on an excellent note with his song Lailakame from Ezra becoming a smash hit,[25] prompting several cover versions, including one by Rahul Raj himself.

[28] He returned from Europe in July 2019 and was immediately signed by Priyadarshan to compose the background score of his magnum opus Marakkar: Arabikadalinte Simham, a historical epic set in the 16th century.

[30] His first release in 2022 was the Mohanlal-starrer Aarattu, directed by B. Unnikrishnan which received predominantly positive reviews for the music, despite the film being critically panned.