Your question is Design a Pay-Order System. 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).
How would you design a pay-order application for Just Eat Takeaway?
Clarify what “pay-order” includes, such as order creation, payment authorization, fraud screening, confirmation, refunds, and retries. Explain where machine learning is appropriate, how you would size and serve the system once traffic and latency requirements are provided, and how you would evaluate reliability, risk decisions, and failure recovery.