Sasikanth was born in Chennai, Tamil Nadu, India to a musically affluent family.

His uncle Deva is a popular music composer.

His cousins are actor Jai and composer Srikanth Deva.

In his early stage, his uncle Deva introduced Sasikanth as a keyboard player in his movie Porkkaalam (1997).Also, he worked along with many other music directors in Tamil and Telugu industry until 2007.

In 2012, Shashi composed the music for Uu Kodathara?