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iOS Developer interview questions

8 questions for interviewing candidates for iOS Developer — each with what a strong answer sounds like and the red flag to catch. Written for founders interviewing without a recruiter.

Role-specific questions

1. Walk me through the most complex system you’ve built. What would you do differently now?

Listen for: Concrete architecture decisions, honest trade-off talk, and self-criticism that shows growth since.

Red flag: Only "we" with no clear personal contribution, or no regrets at all.

2. Tell me about a production incident you caused. What happened and what changed afterwards?

Listen for: Ownership without excuses, a clear timeline, and a process or tooling change that outlived the incident.

Red flag: Claims to have never broken production — everyone senior has.

3. How do you decide when code is good enough to ship versus needs more polish?

Listen for: A pragmatic framework tied to user impact and reversibility, not perfectionism or recklessness.

Red flag: "I just know" or shipping standards that depend entirely on deadline pressure.

4. What’s a technology choice you argued against and lost? How did you handle it?

Listen for: Disagreement handled professionally, commitment after the decision, and honest reflection on who turned out right.

Red flag: Still relitigating the decision, or never having disagreed with anyone.

5. How do you use AI tools in your workflow today, and where do you not trust them?

Listen for: Real daily usage with specific examples plus a clear-eyed sense of failure modes.

Red flag: Either blanket rejection or blind trust — both age badly in a small team.

Closers that work for any role

6. What does a great first 90 days in this role look like to you?

Listen for: Learning before changing, early small wins, and questions about how you’d measure them.

Red flag: Grand transformation plans before understanding the context, or no ambition at all.

7. What part of this kind of role do people usually underestimate?

Listen for: Lived-experience insight that only someone who’s done the job would know.

Red flag: Generic answers that could come from reading the job description.

8. What would your last manager say is the thing they had to manage around?

Listen for: A real weakness stated plainly, plus the compensating system they’ve built.

Red flag: A humblebrag ("I care too much"), or claiming the manager would say nothing.

Take this iOS Developer hire from first conversation to offer.

Keep your job listing, applicants, relevant experience, and interview decisions together. Your team chooses what happens next.

More engineering interview kits

iOS Developer Interview Questions & Red Flags (2026) — Penroll