Does a computer science major need any certificates after completing their major?

assuming one were to do well academically, and build up their portfolio also during their free time (hobby and such), would a programmer/software engineer need certs, like IT pros do? or is it enough to just learn extra languages and such on your own, and prove it to your employer.

my plan is to excel in my BS program, and once i have some years under my belt, go for an MS program.

thanks in advance!!!