Problem Solving and Debugging Persistence Questions

Stories about challenging technical problems you have debugged or solved: your systematic approach, the multiple strategies you tried before finding one that worked, when and how you sought help appropriately, and what you learned from failure along the way. Strong answers walk through a specific problem end to end: how you formed and tested hypotheses, what evidence (logs, metrics, reproduction steps) you gathered, how you decided when to escalate versus keep digging, and what you changed afterward so the same class of problem was less likely to recur.