Bagchi collaborated with lyricist Vayu Srivastava for a single Oopar Oopar Renn De. Anurag Kashyap liked it and led the duo to a person named Ravi Adhikari, a close relative to the director of 2015 film Tanu Weds Manu Returns, Aanand L. Rai. The duo then made their debut in Bollywood with the song Banno. Before composing for films, he produced and arranged music for TV shows like Thapki...Pyar Ki etc. Bagchi debuted as a solo composer in the song Samandar in Kis Kisko Pyaar Karoon. Bagchi's first remake song Humma Humma, from the 2017 filmOk Jaanu. was initially disliked, but later went on to receive over 200 million views on YouTube. That same year, he recreated more classic songs like Tamma Tamma, Mere Rashke Qamar, Cheez Badietc. He then won the Zee Cine Award for Song of the Year for his song Baarish from Half Girlfriend and the 2018 IIFA Award for Best Music Director for the film Badrinath Ki Dulhania.Tanishk-Vayu's song Kanha got many nominations and the singer Shashaa Tirupati also won one of them. In 2018, Bagchi made his Telegu debut in the song "Adbhutam" from the film Lover. He also recreated two songs that year - Dilbar in the film Satyamev Jayate which received 20 million views in its first 24 hours of release on YouTube, and Aankh Maarey for Simmba which became the party anthem of 2018-19 New Year's parties.The others include Sanu Ek Pal Chain, Gali Gali, Naam Hai Mera etc. He also collaborated with Himesh Reshammiya in the recreation of Reshammiya's hit track Aashiq Banaya Apne in Hate Story 4 with additional vocals of Neha Kakkar. In 2019, Bagchi was nominated as the best lyricist for his song Ve Maahi from the 2019 film Kesari at the 65th Filmfare Awards. He later released his single "Khud Se Zyada" with the independent record label VYRL originals as a singer-songwriter. His single Vaaste, sung by Dhvani Bhanushali and Nikhil D'Souza became the most viewed Hindi track on YouTube in 2019. He also composed Makhna song for the Netflix drama Drive.In the same year, he made his debut in Tamil through his song Kadhal Psycho in Saaho. The song was composed by him in Telegu, Malayalam and Hindi as well. He collaborated with Kshmr for the theme song of Good Newwz. In 2020, Tanishk-Vayu composed the Pepsi anthem Swag Se Solo and Holi song Mere Angne Mein. The duo also composed the soundtrack album Shubh Mangal Zyada Saavdhan. Bagchi also recreated 3 songs in Street Dancer 3D. He has also recreated the evergreen song Tip Tip Barsa Pani for Sooryavanshi, which was postponed indefinitely due to the COVID-19 pandemic. Bagchi is also credited for the rise of Dhvani Bhanushali in the music industry. One of her first songs, Humsafar, which was originally composed by Akhil Sachdeva for Badrinath Ki Dulhania, was reprised by Bagchi for T-Series Acoustics. Her hit songs like Leja Re, Koka, Vaaste etc. were compositions of Bagchi.
Most of Bagchi's compositions have reached the milestone of over 100 million views on YouTube. Bagchi's most viewed music video is the lyrical video of Aankh Maarey from Simmba. Aankh Maarey and Dilbar are the songs which achieved 1 billion views each.
Filmfare Award for Best Music Director for Bareilly Ki Barfi along with Arko Pravo Mukherjee, Samira Koppikar, Sameer Uddin & Vayu
Controversies
Bagchi has been severely criticized over the quantity and quality of his remixes. In 2019, his remake version of the song O Saki Saki achieved a lot of views but was criticised by the original music director, Vishal Dadlani.In 2020, his remake version of the Delhi-6 song Masakali, titled Masakali 2.0, which was initially supposed to be released as part of the soundtrack of Marjaavaan, was severely criticised by the makers of the original, including composer A. R. Rahman, lyricist Prasoon Joshi and singer Mohit Chauhan. He was also trolled on entertainment websites and social media platforms. Bagchi had earlier said that he didn't want to make remakes in the beginning, but got an opportunity to make the music for "The Humma Song" for Ok Jaanu.
