If you've got a solid background in backend, I suggest you to monitor your local job postings every day.
Also follow on Linkedin and built up the connections with ICO organizators.
There's a huge chance to get a great job, because crypto is hottest topic of 2017.
Just try being social and communicate with relevant people. Show what you can offer, that's my 5 cents.
You'll build up your skills during the work instead of courses and other theoretic stuff.
What I believe without minimum knowledge, if you start the job you can't perform well. Its true you'll build up your skills during the work instead of theoretic courses, still you need minimum theoretic knowledge to kick start your career.