Describe an application you personally modernized. What did you own, what key decision did you make, and what was the result?
How did you divide a migration into safe increments? What moved first, how did the old and new systems coexist, and how did you manage cutover or rollback?
Tell us about an undocumented legacy behavior you discovered. How did you validate the intended behavior and prevent regression?
Describe a production issue spanning the frontend, backend, and database. How did you isolate the root cause, and what permanent fix did you implement?
Tell us about an architectural problem you identified beyond your assigned work. How did you influence the decision, and what did you personally deliver?
Describe using an AI coding assistant for complex production work. What did it get wrong, how did you catch it, and how did you validate the final code?