"Tell me about a time you mentored a junior engineer who was struggling or growing quickly. How did you approach the mentorship, how did you balance support with accountability, and what was the outcome for that engineer and the team?"
This question tests whether you can develop others in a practical, repeatable way rather than just being generally helpful. Interviewers want to see how you diagnose gaps, tailor your coaching style, create psychological safety, and still maintain delivery standards. They are also looking for influence without authority, since mentoring often happens without direct management responsibility.
A strong answer shows that you did more than answer ad hoc questions or review code. It should demonstrate how you identified the engineer's needs, set clear expectations, invested time intentionally, and adjusted your approach based on evidence. Good candidates also show ownership of team outcomes, not just the mentee's feelings.
Use one specific example with clear stakes, such as onboarding, performance recovery, or preparing someone to own a project. The best answers include concrete actions, measurable progress, and a lesson about how your mentoring style evolved.