Rajarshi Mitter is a guitar player, music producer, and a music instructor from Kolkata. He started his professional journey as a musician when he was 18 years old. Belonging to a family inclined towards music, Rajarshi had an interest in music from a very young age. His father used to play the harmonium and keyboard as a hobby. He had a significant influence on Rajarshi, which intrigued him to get started with music. Rajarshi started playing keyboards when he was around five years old. He took up guitar when he was 14.

Rajarshi has had collaborations with a lot of eminent artists in the Bengali and Hindi music industry like, Cactus. Sixthveda, Nikhita Gandhi, Ujjaini Mukherjee, RJ Neil, among others. He is currently playing guitar and keys for the Bengali band Eeshaan. Apart from all of this, he has his solo project under the moniker 'Mr. Mitter' where he composes and produces all his music. He has a youtube channel with the same name.

He has completed his Grade 8 certification in electric guitar from the London College of music. He is a music instructor catering to a vast number of students spread out across the country. He loves teaching his students, which accounts for a significant portion of his professional spectrum.

His primary influences in music are Dream Theater, A.R. Rahman, Yanni, Hans Zimmer, and guitarists like John Petrucci, Steve Lukather, Joe Satriani, Mateus Asato, Ichika Nito, etc. He believes in working for the entire community of musicians and listeners to uplift the entire fraternity in the most rewarding manner.