I'm lucky to work developing mathematical models and artificial intelligence systems in Spain, a good job that nowadays can be learned for free through the internet and a lot of effort.
I believe that, as Leila Janah said, talent is equally distributed around the world, but opportunities are not.
After studying mathematics, I could also study economics and became a big fan of great development economists such as Ayittey, Moyo, Easterly, Collier, Sen, Deaton, Duflo, Acemoglu, Bauer and Austrian School of Economics in general.
When you repay your loans, you are also helping others since I'm not withdrawing any money, but supporting new projects using those paybacks.
Good luck in your projects!!