What have worked for me is to use my friend network. Send an application to the same place one of your friends work, and ask them to become your champion. If you do not have any friends in software, prepare a CV and send it out to every emplyer you can find. You will need to contact hundres if not thousands, but when you do get an interview, do not mention you have applied anywhere else if you get asked you need to lie and say that you did not apply to anywhere else, unless you have got multiple offers.
In the interview they will ask you how you can help them, and what they should hire you for. You need to reverse those questions in order to find out what they like you to do. What they need... Using any work sites like Linkedin, or Github is a waste of time.
Something that will impress employees is if you are a public speaker, so make a talk and have someone record you, it doesn't matter if there is a audience or not.
Hiring in general and especially in software is FUBAR. It doesn't matter how good you are at doing the work, all that matters is your contact network and/or how good you are at the hiring process.