i'm a b.tech mech engg.i wanna join a IT/softw company as software developer.what type of specialization course i shd do n is it beneficial?

Before starting career in software industry i would like to ask u r u very much confidant on any of the programming language. Can u independently handle any language? If ur ans comes YES then only think for software development line or testing line. Every line is good only depends upon u how much