How to find a Tech co-founder in a country known for its tech expertise?

I am from a non-tech background (finance guy to be specific). I am aiming big and want to start a fintech startup but I don't have any CS engineer friends to rely on.

I invite you all to guide me how to find a tech co-founder or even a partial-CTO who can program my vision into an app and also maintain it until I can afford a full time one.

I know that I can get it done with any software company but I have trust issues in sharing my idea with a stranger (knowing that how easily can an idea be stolen).