Why not try Nairobi/Kampala first? Or even Joburg or Durban? There's size able software industries in these places and you could probably even attend the interviews in person.
As I said elsewhere in the thread I worked with some Kenyans and a few refugees in the Kakuma camp, and I do not get the impression Kenya, Nairobi or elsewhere, is just flush with jobs at the moment.
Blah blah, globalized economy, blah blah. But I would love to hear other Africans from Kenya, SA, and elsewhere chime in and correct my foreigner BS here. My time there was short, so I can be way off base.
Working as a foreigner in SA... There is a big shortage of good developers here, trust me. And many companies are willing to help out with getting a Visa. Might not be as fancy and "*.io"-domained as the US/EU jobs, but they're there and willing to hire anyone that is good.
Hi, SA dev here (Cape Town). A starting salary is usually 18-22k, a mid-level position is usually starting at between 30k and 40k and for experienced devs (around 5+ years experience usually) around 50k and I'm sure lots of people get more.