Born on the 3rd of September in a middle class Bengali family in Kolkata, Ujjaini was introduced to music by her parents at the tender age of two and a half years, eventually progressing to train in Hindustani Classical Music under the guidance of Pt. Ajoy Chakroborty and then Pt. Biresh Roy for many years.
At age 10, Ujjaini received her first award from Pt. Vijay Kichlu and it was during her early teens that she decided to become a playback singer and performer. Her first recording was for the brilliant composer Debojyoti Mishra.
At the age of 16 she participated in the Hero Honda Saregamapa Challenge 2005 and achieved 7th position in the final tally of candidates.
It was immediately followed by Hero Honda Saregamapa Ek Main Aur Ek tu, where Ujjaini grabbed the wining trophy along with Aishwarya. Since then there has been no looking back.
She has been singing for films in various languages, learnt various styles and techniques of singing including western styles such as Opera, Jazz, Etc. and written, composed & released her own songs as well.
She was nominated for the Radio Mirchi Awards Mumbai in the 'Upcoming Female singer' Category for the song "Manu Bhaiya" from the film Tanu weds Manu (2012).
She was also nominated for FilmFare awards east for Ami Akash khola from the film Aborto ( 2014) and was the Winner of The Kalakar Award as the best female performer of 2015.