> I was invited to speak at an event (...) One of the apparent organisers of this event contacted me separately to say there was a vacancy for a teaching position and would I be interested (...) I submitted my CV (...) A few weeks later I was "interviewed"

This sounds exactly like the kind of job opportunity that's meant to come about by networking, getting your name out there, public speaking and so on. We are often told that this is how the best jobs are found.