Your question is Frontend and Backend Performance Tuning. 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 have you approached performance optimization on both the front-end and back-end in your previous projects?
Describe how you identified bottlenecks, selected optimizations, and balanced performance improvements against delivery risk and maintainability. Include the tools or measurements you used, how you validated results, and how you coordinated changes across the stack.