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Home/Templates/Interviewing/DevOps Engineer interview questions
Template & guide

DevOps Engineer interview questions

Thirty vetted interview questions for DevOps Engineer candidates covering CI/CD, infrastructure as code, observability and incident response, security, and platform mindset.

  • Made forEmployers · Recruiters
  • Reading time~3 min
  • What's includedA complete, professionally written document you can adapt to your team.
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The template

Use these questions to interview DevOps Engineer candidates at {{Company name}}. The strongest signal in this role comes from incidents and automation the candidate personally built, so keep pulling answers from the general to the specific: which pipeline, which outage, which change. Group the questions across two or three technical sessions plus a collaboration-focused conversation.

CI/CD and automation

  • Walk me through the deployment pipeline you are proudest of — stages, gates, and how long a change takes from merge to production.
  • Tell me about a deploy process you inherited that was manual and scary. What did you automate first, and why that first?
  • How do you make database migrations safe inside a CD pipeline?
  • What is your rollback story — how fast, how tested, and when did you last actually use it?
  • How do you keep pipelines fast as the codebase and team grow? Give a real optimization.
  • Tell me about a bad change that your pipeline should have caught but did not. What gate did you add?

What good looks like: strong candidates measure their pipelines — lead time, failure rate, time to restore — and sequence automation by risk reduction, not by what was fun. The rollback question separates practitioners from theorists: the best answer includes the last date it was exercised, not just the mechanism.

Infrastructure as code and cloud

  • Describe the infrastructure you currently manage as code — tools, structure, and what is still clicked by hand.
  • How do you review an infrastructure change that could take production down?
  • Tell me about refactoring messy infrastructure code without breaking live systems.
  • How do you manage environments — what is truly identical between staging and production, and what is not?
  • Walk me through a cost optimization you made in the cloud. What were the savings?
  • How do you handle secrets across environments and pipelines?

Observability and incident response

  • Tell me about the worst incident you responded to. Walk me through the timeline: detection, diagnosis, mitigation, resolution.
  • What did the post-mortem for that incident change? Was the change still in place six months later?
  • How do you decide what to alert on? Tell me about an alert you deleted and why.
  • What does good on-call look like — rotation, load, escalation, and how do you know it is sustainable?
  • How do you instrument a service nobody understands anymore?
  • What is the difference between monitoring and observability in your own practice, with a concrete example?

What good looks like: the best candidates narrate incidents with honest timelines — including the wrong turns — and their post-mortem changes survive as automation or guardrails, not action items that died in a document. Deleting a noisy alert is as strong a signal as adding a good one; alert fatigue stories show real operational maturity.

Security and reliability engineering

  • How do you bake security into the pipeline — scanning, dependency updates, image hygiene?
  • Tell me about a security finding you remediated in infrastructure. How was it found?
  • How do you apply least privilege in cloud IAM without grinding teams to a halt?
  • What is your patching strategy for base images and hosts?
  • How do you prepare a system for a traffic spike you know is coming?

Collaboration and platform mindset

  • Who are your users as a DevOps engineer, and how do you know they are happy?
  • Tell me about making a paved road so easy that teams stopped bypassing it.
  • How do you say no to a team that wants a special snowflake setup?
  • Describe teaching developers to own their services in production. What resistance did you hit?
  • Tell me about a disagreement over reliability versus feature speed. How was it resolved?

Not legal advice

This template is provided for general informational purposes only and is not legal advice. Laws differ by jurisdiction and change over time — have a qualified professional review any document before you rely on it.

For this role

  • DevOps Engineer salary & market data
  • DevOps Engineer skill assessment
  • DevOps Engineer job description

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