Github. Github Github Github. LinkedIn for recruiters seems to be a case of aggregating people who potentially have some sort of experience related to what you want. It's great for them because it gives them a pool of people to cold-call. It's not so great for the aspiring employees because chances are greater you will be contacted by a company that doesn't care about you and vaguely relates to what you do than anything else.
It seems like people are afraid that if they delete their linkedin profile they'll miss out on "all those job opportunities!"... Damn it guys, everything dev-related outside of js/html/php is a buyer's market. If you're in need of jobs, there's plenty of high quality freelance websites that can act as a linkedin profile and actually have running jobs.
I'd love to know if anyone actually relies completely on LinkedIn to get their all-precious jobs in the tech sector... because if you do, you're doing it wrong and I'd love to help you.