You are building an ML driven payment decision layer for a global e commerce platform. The system should improve authorization rates and reduce fraud by deciding how to route, score, and optimize transactions across payment methods and acquirers.
How would you design a scalable payment solution for a global e-commerce platform?
Real-time payment routing and rankingOnline model serving in the authorization pathFeature store design for batch and streaming signalsDrift, skew, and monitoring in a high-stakes ML systemOffline and online evaluation strategy