Recruiter screen with an AI interviewer: distributed systems experience and production debugging

A short first screen run by an AI interviewer that asks questions quickly. Expect:

1. Your project experience with the stack in the job description (Go, Java, Spark, Elasticsearch) for distributed systems.
2. How you trade off availability, maintainability and scalability in a backend service.
3. How you use metrics and logs to find the root cause of a production problem.
4. How you investigate a bug that keeps coming back and make sure it does not return.

Prepare short, concrete stories for each; vague answers stand out.