You are building a system that processes meal orders as they happen in a food marketplace. The product needs to decide what meals to show, prioritize, and update in real time as inventory, delivery windows, and user behavior change.
How would you design a system for processing meal orders in real-time?
Real-time meal retrieval, ranking, and re-rankingOnline feature serving with fresh inventory and delivery signalsCold-start handling for new diners and new mealsMonitoring for feature drift and training-serving skew