I'm a budding software developer. I have the most experience with full stack web development. Ruby on Rails, JavaScript, PHP -- that's my game. After filling out my profiles to the best of my ability, I've noticed something very significant. This is a comparison for startup and job opportunities for 2 places to market yourself (Note: I'm not a LinkedIn Premium member):

LinkedIn profile creation date: 03/02/13
LinkedIn connections: 518
Emails from companies/recruiters: 6

Angel List talent profile creation date: 02/09/14
Angel List followers: 30
Emails from startups/recruiters: 15

Bottom line: USE ANGEL LIST. Startups desperately need engineering talent like YOU. The best part: you get to see the salaries (and equity %) all upfront.