Your question is Biggest Technical Challenge. 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 one of your biggest technical challenge.
Explain the technical context, why the challenge was significant, your specific responsibility, and the actions you took to resolve it. Focus on how you handled uncertainty, competing priorities, collaboration, and trade-offs rather than describing technology alone. A strong response uses STAR, distinguishes your contribution from the team's work, quantifies the result where possible, and includes what you learned or would change.