Sachdev was born in Jaipur. He started learning music when he was three years old, beginning with Hindustani classical vocals and rhythm. He then went on to train in the Western classical piano during his school days.
In 2018, he composed four songs for Veere Di Wedding, a Bollywood female buddy comedy film, directed by Shashanka Ghosh. The film stars Kareena Kapoor Khan, Sonam Kapoor Ahuja, Swara Bhaskar and Shikha Talsania. He scored for Selection Day an Indian Netflix Original Sports web television series, based on Aravind Adiga‘s 2016 novel of the same name. Produced by Anil Kapoor and Anand Tucker.
In 2019 he composed the music as well as the background score for Uri: The Surgical Strike, an Indian action film written and directed by debutant Aditya Dhar and produced by Ronnie Screwvala under his banner RSVP Movies starring Vicky Kaushal. The film is based on the 2016 Indian Army’s surgical strikes on PoK in retaliation for the Uri attack. The film’s music received rave reviews. His background score was also appreciated and released separately on popular demand. Sha won the award for Best Background Music in the 66th National Film Awards for Uri: The Surgical Strike. He won the 65th Filmfare R.D. Burman Award for the best new and upcoming talent. Shashwat also won the 21st IIFA Award for best background score for Uri: The Surgical Strike.
Shashwat has composed the following songs in Bollywood.
|2017||Phillauri||“Dum Dum”||Romy, Vivek Hariharan||Anvita Dutt Guptan|
|“Sahiba”||Romy, Pavni Pandey|
|“Naughty Billo”||Diljit Dosanjh, Nakash Aziz, Shilpi Paul (Rap:Anushka Sharma)|
|“Bajaake Tumba”||Romy, Shehnaz Akhtar|
|“Dum Dum (Reprise Diljit Dosanjh Version)”||Diljit Dosanjh|
|“Dum Dum (Pubjabi Version)”||Romy, Vivek Hariharan||Shellee|
|2018||Kaalakaandi||“Kaalakaandi Title track”||Shashwat Sachdev, Vivek Hariharan, Romy, Arun Kamath||Anvita Dutt Guptan|
|Veere Di Wedding||“Pappi Le Loon”||Sunidhi Chauhan, Shashwat Sachdev||Shellee|
|“Bass Gira De Raja”||Shashwat Sachdev|
|“Aa Jao Na”||Arijit Singh||Raj Shekhar|
|“Bhangra Ta Sajda (No One Gives A Damn)”||Neha Kakkar, Romy, Shashwat Sachdev||Gaurav Solanki|
|2019||Uri: The Surgical Strike||“Challa (Main Lad Jaana)”||Romy, Vivek Hariharan, Shashwat Sachdev||Kumaar|
|“Jigra”||Siddhartha Basrur, Shashwat Sachdev|
|“Jagga Jiteya”||Daler Mehndi, Shashwat Sachdev, DeeMC|
|“Beh Chala”||Yasser Desai, Shashwat Sachdev||Raj Shekhar|
|“Manzar Hai Ye Naya”||Shantanu Sudame, Shashwat Sachdev||Abhiruchi Chand|
|Award ceremony||Category||Nominated work||Result||Ref.|
|10th Mirchi Music Awards||Upcoming Music Composer of The Year||“Bajaake Tumba” from Phillauri||Nominated|
|“Sahiba” from Phillauri|
|Best Song Engineer (Recording & Mixing)||“Naughty Billo” from Phillauri|
|National Film Awards||Best Music Director (Background Score)||Uri: The Surgical Strike||Won||National Film Award for Best Music Direction|
|Filmfare Awards||Best New and Upcoming Talent||Uri: The Surgical Strike||Won||Filmfare R. D. Burman Award|
|IIFA Awards||Best Background Score||Uri: The Surgical Strike||Won||21st IIFA Awards|