In your opinion, what technical skill are most "junior' developers (career changers, boot camp grads, self learners, etc) missing that could prevent them from getting their first developer job or moving up in their career?
I can't say a lot about moving up in the career, as I am still junior. But when it comes to getting your first developer job, it's a tough place to be in. I think most "junior" developers don't know their value (they are very important), and how to market themselves.