Check out weworkremotely.com and also wfh.io, I've checked them recently).

I'm also kind of annoyed at the companies that say "we allow remote work, but you have to be in the USA". Feels like kind of a cop out.

Also, you might want to look at some of the other African nations like Nigeria which no doubt need programming/web work. Not sure how easy it is to find jobs there, but maybe that's a job board you could create? You're probably not the only one with this problem, and might be a win-win-win for you, african companies, and other developers.