Your question is Design a Payment System Like Venmo. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Design a payment system like Venmo.
Discuss an end-to-end ML design for payment authorization, fraud detection, and account-takeover prevention. Cover scale estimation, online and batch processing, multi-stage risk evaluation, model serving, monitoring, compliance, and safe degradation during model or dependency failures.