It's great that you're interested in applying tech to help solve humanitarian crises. I'd encourage you to considering going domain-first instead of tech-first

It's great that you're interested in applying tech to help solve humanitarian crises. I'd encourage you to considering going domain-first instead of tech-first into a problem, as I think you'll find yourself to be more impactful that way. Consider covid-19: Apple and Google rolled out these contact tracing apps in pretty record time. And yet, they had virtual no impact on the actual epidemic. However, there's still a ton of tech being used to fight it. It's just the tech being used isn't from large tech companies that swooped in, it's from people who have been doing this for years before the pandemic and will probably continue doing it for years after. None of this diminishes the need for tech people to help on these causes; you're probably going to be better able to have an impact working within the orgs doing the work, rather than a startup or tech company trying to sell to those orgs. Alternatively, consider looking up resources on "Effective Altruism" -- one direction that could take you is that your ability to improve the world may be to just make as much money as possible and to donate it directly to those most in need.