How to get freelancing/consulting opportunities for Fintech Space - UPI/Payments etc?

Hey i am trying to find some freelancing/consulting opportunities for UPI/Payments space while keeping my anonymity. How should i start since I can’t just post it on twitter/linkedIn. I have lead tech for 2 startup’s specially in UPI space, made their application go live from 0 to 100k users but now pivoting to another space but don’t wanna lose the touch. Would be happy to help :)