At the age of 21, Malvika was crowned as
Miss Nepal 2002. Since then she has worked for Call Kantipur as a TV host in
Kantipur Television. In 2008, she worked for
Voice of India,
MTV EXIT as the Ambassador for Human Trafficking Subba has also been associated with Youth Spokesperson for Action Aid's Hunger-Free Campaign, HIV/AIDS Youth Leader by
UNICEF and worked with Shangrila Housing as Sales and Marketing Manager in 2009–2011. In 2008, she acted in movies and dramas like
God Lives in The Himalayas,
Good Bye Kathmandu and
Hamri Shiwani. From April to October 2011, she worked as the chief editor for one of Nepal's leading fashion and lifestyle magazine, Navyaata. In 2011, Subba established her own retail clothing store with in-house designers. She is the Co-Founder and Creative Director of House of Alternative Apparel also known as HAA and Himalayan Climate Initiative(HCI). From 2015, she is the host and head judge of
Mega Model which is now at its third season. ==Controversy==