[mmarian]

Why don't you reach out to the person who's hiring, tell them your situation, and ask for an informal chat? Maybe even offer to work for free / on a freelance basis for a few months? Or build something that's relevant to them, then show them?

Better than writing up a generic bio/cover letter and going through their ATS.

I wouldn't bother too much with LinkedIn, just put the tech keywords and you're set.