Ask HN: What is the best way to do good and get to travel with my coding skills?

I recently met someone who organized volunteer English teaching programs abroad in Southeast Asia. This got me wondering whether something like this was already established for coding / tech skills, as I would like to do something similar in the future.

I see two ways of doing this:

-Teaching coding / tech skills to locals -Helping solve certain problems in developing / emerging countries by building open-source software (e.g. for agriculture, schools, ...) and teaching the locals some skills to make the efforts sustainable ("teach a man to fish(...)" etc. etc. ;-)

Curious about what others know in this area! I am aware that technology is not and should probably not be the main focus of development efforts in a lot of places as there are more basic things to sort out first that benefit more people with less effort, but where it makes sense one might as well get an early start.