How to Approach System Design Interviews as a DevOps Engineer

System design interviews for DevOps and Platform Engineering roles differ from typical backend system design interviews — the focus shifts toward reliability, scalability of infrastructure, and operational excellence.

A Structured Framework

1. Clarify requirements — throughput, availability targets, budget constraints.
2. Start with the infrastructure boundary — networking, compute, and data layers.
3. Design for failure — redundancy, health checks, automated recovery.
4. Discuss observability — logging, metrics, tracing, alerting.
5. Address cost and operational trade-offs explicitly.

Common Pitfalls

Candidates often jump straight to naming cloud services without first clarifying requirements or discussing trade-offs. Interviewers consistently reward structured thinking over service-name-dropping.

Summary

Treat every system design interview as a conversation about trade-offs, not a checklist of AWS services. Structure your answer, narrate your reasoning, and always circle back to reliability and cost.