Your question is Security Considerations in Solution Design. 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).
You're designing a new architecture for a customer-facing platform that will handle sensitive data and integrate with internal systems. Before the design is finalized, you need to make sure security is built into the approach rather than added late in delivery.
How do you approach security considerations in your designs?