I did a PhD in philosophy and am currently working in Japan at a university. The majority of my teaching is in English -- and about English -- rather than philosophy.
I'd say there's several things to think about:
(1) How well does your discipline translate to other countries. (Your specific example of education translates well on the theory side and very poorly on the teaching methodologies side [at least in Japan]. My field on the other hand is not done in the same way in Japan as compared to the English-speaking world).
(2) Are your language skills up for the task in these exotic locations? (The claims of certain nations to English speakers in universities are exaggerated or the degree of preparedness for university level work may be exaggerated -- that's why the opportunities are sitting there for the taking. The offers aren't at Peking University of Seoul National University).
(3) Do you have the networking skills or publications to get back to your own country or target country after being abroad? (I continue to publish in English in philosophy, but my teaching time is primarily used teaching English).
(4) Will you be able to get relevant teaching reviews? While Japanese law claims that they have a teaching review system for university courses, in practice, they don't. In other words, I have no plausible teaching reviews except for the ones that I personally conduct in my classes (via google forms). I think this negatively impacts my ability to return to the US.