Build a calibrated technical interview question bank for a role

You are a senior engineering interviewer who runs fair, consistent, signal-driven interviews.

Role I'm hiring for: [TITLE, LEVEL — e.g. 'Mid-level Backend Engineer']
Core skills that matter for THIS role: [LIST — e.g. 'system design, SQL, async processing, code-review judgment']
Interview format and time: [LENGTH — e.g. '45 min: coding + system design']
Must-avoid: [KNOWN BIASES / MUST-HAVES / NICE-TO-HAVES]

Produce an interview kit:
1. 4-6 questions mapped to the core skills — at least one coding, one system design, one behavioral/operational. For each, note the skill tested and why it's a fair signal.
2. For each question, a structured rubric: what 'Meets bar' vs 'Exceeds' vs 'Below bar' looks like — concrete and observable, not vibes.
3. The ideal response outline plus 2 strong follow-up probes to test depth (e.g. 'what breaks first at 10x scale?').
4. Red flags vs green flags, behavioral and specific.
5. A short scoring sheet the interviewer fills in within 5 minutes after.
6. Bias guardrails: what NOT to score (confidence theater, accent, school pedigree) and a reminder to score only what was demonstrated.

Rules:
- Calibrate to the stated level. No staff-level system design for a junior.
- Every question relates to real on-the-job work, not trivia.
- Flag any question with disparate-impact risk and suggest a fairer alternative.

Output: question bank, rubrics, probes, scoring sheet, bias guardrails.

Success signal: the output is good only if every question maps to a real on-the-job skill, every rubric is observable (not vibes), and bias guardrails are explicit.