Lots of good advice below. I'll add something that you might find useful for your interview process. If you really really want to work at company A, get some pr

Lots of good advice below. I'll add something that you might find useful for your interview process. If you really really want to work at company A, get some practice interviewing at 2 or so other companies, for similar positions, first. It will help you hone your technical and social interviewing skills and by the time you get to the desired interview, should fare better than if you went in cold.