If it's for a portfolio then you're probably going to work for people. What are you going to be doing for them? How are you going to add value to their busines

If it's for a portfolio then you're probably going to work for people. What are you going to be doing for them? How are you going to add value to their business? If they wanted that value and were actively looking; what job titles would they put into Google? That's what you want to describe yourself as on a portfolio site.