Yes, all the world’s a stage. This means, in part, that rather than expecting to be your authentic self on all occasions and on all stages it is more realistic, challenging, and even authentic to be “in character” on whichever stage you find yourself or on which you choose to appear.
At the job interview as with your friends, you can be recognizably you even as the situation demands different roles, different selves.
“In character” on all your stages and “of character” too.