Your question is Security and Performance in 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).
Describe how you incorporate security and performance considerations into your system design and project work.
Explain your process from requirements and threat modeling through architecture, implementation, testing, deployment, and operations. Cover how you identify trade-offs, select measurable controls, prevent regressions, and verify both security and performance in production.