[9] Having performed in radio and television programs as a child artist,[10] Deepika later studied music under the musician Dunstan de Silva.
In the meantime, she met popular artist Athula Ransirilal at Kalubowila Sri Sambuddha Jayanthi Buddhist school.
At the age of 10, Deepika got the opportunity to sing Sanda Mama and Sangeetha Handawa on Sri Lanka Broadcasting Corporation (SLBC).
[6][3] She started her career in 1985 with the song Aaju Thapara Lahila sung for the television serial Bhagya directed by Vijaya Dharmasri.
[6] In 2006, she was lucky to perform in world renowned Sydney Opera House on 3 September and then in Melbourne Concert Hall in Australia and Camden Center in London.
[10][6] Some of her most popular songs include; Sina Podak Vee, Pembara Kumarana, Ahasai Oba Mata, Me Thani Yahane, Premayata Nim Him, Oba Heenayak Wage, Nubata Inne Mama Witharada, Boralu Aenena, Pithu Senehe Pidu, Kandulu Hela and Jayasiri Ma Hamuduruwane.
[13] Deepika was among 20 laureates of the Philippine Gusi Peace Prize 2012 for performing arts with her song Ma Thotin Ena in the film Saroja.
In 2017, she won the Sumathi Award for the Best Singer for the theme song of television serial Maada Obama Viya directed by Sahan Wijesinghe.