"... get a trusted developer you know to give you an opinion on it" That's the only way I can see it working. I also suggest in looking around for a test you c

"... get a trusted developer you know to give you an opinion on it" That's the only way I can see it working. I also suggest in looking around for a test you can hand them, i.e. the FizzBuzz test. If their answer looks the same as your answer they're competent.