DoorDash Service Debugging Questions

Approach to diagnosing and resolving production incidents and service defects within delivery platform services. Candidates should demonstrate how to use logs, metrics, distributed tracing, request replay, and system topology reasoning to isolate issues such as misrouting from load balancers, race conditions in payment flows, or incorrect aggregation of metrics. Good answers include safe mitigation steps, validation of fixes, roll back or compensating actions, and lessons that feed into post incident improvements.