Tell Me About a Time You Made a Mistake

Question

Tell me about a time you made a mistake.

Answer

Situation: At MedRing, I worked on an old backend system, and at first I focused too much on finishing a function. I did not check the query efficiency early enough.

Task: When I reviewed the data flow more carefully, I realized I needed to take responsibility and improve it before it became a bigger problem.

Action: I checked the database queries step by step and found some slow queries and repeated calls. Then I updated the backend logic, reduced unnecessary queries, and improved the way large data lists were loaded. After that, I made it a habit to review query performance earlier in similar tasks.

Result: The feature became smoother and the backend worked more efficiently. The lesson for me was simple: if a feature uses a lot of data, I should check performance from the beginning, not near the end.