I'm 20 years into my career and know how to program competently. I have missed out on job opportunities because I don't have any credentials other than experien

I'm 20 years into my career and know how to program competently. I have missed out on job opportunities because I don't have any credentials other than experience. I'm the type of person who would test out of everything immediately because I already know it. Guessing it's similar for this fellow.