The actor has stated in interviews that he quit a well-paying job as a banker in Dubai, before moving to Chennai for opportunities in cinema. Arjun remembers being overweight. He lost around 36 kilograms (79 lb), which was when he decided to enter the Tamil cinema industry.
In 2012, he debuted in the independent film Perumaan. Regarding his role in the film, The Times of India stated that “Arjun makes a confident debut”. After shooting for the Netflix-featured independent film and Atlee’s debut venture, Andhaghaaram, Arjun Das worked with Radio One 94.3FM hosting the Drive show as a radio jockey. He cites this past occupation as a form of sustenance before entering the film industry, and has often mentioned that this was where he first claimed a fan base for his voice. He has also portrayed Gopichand‘s brother in the Telugu movie, Oxygen (2017).
Scouted by Lokesh Kanagaraj for Kaithi, Arjun was initially hesitant to sign the film, due to the importance and substance of the character. After auditioning with a scene that didn’t make it to the film’s final cut, he landed a role as the main antagonist in the film. Quoting Dhanush as his inspiration, he claims that he is not the type to seriously prepare for any scene, however, he did conduct basic research to get into the skin of the character, with emphasis on the behaviour of drug use. He received abundant appreciation for his role and voice in Kaithi, following which he was once again roped in by Lokesh Kanagaraj for Master. Often attributing his talent and fame to Lokesh Kanagaraj, Arjun has expressed his gratefulness to him for the role of Das in Master, for which he was called a few days after the commencement of shoot. His piercing glares and iconic voice in the film set him aside from the rest of the varied cast, as he portrays a sub-antagonist role responsible for controlling the children of a juvenile centre with the influence of drugs.
His most recent release is the supernatural thriller, Andhaghaaram, in which he plays the lead role of Vinod, an alcoholic and smoke addict of a coach, guilt stricken of his friend’s mental condition.
His upcoming films include Kumki 2, where he portrays a character with “shades of grey” and Dhruva Natchathiram, in which he lent his voice for the villain character. He will play the lead in an untitled film directed by Anwar Rasheed.
Arjun made his acting debut in the suspense thriller Perumaan (2012). Following a few other movies and short films, he appeared in Lokesh Kanagaraj’s Kaithi, portraying the film’s antagonist, a cocaine addict gang leader.