>DevOps Interview KB

System Design Interview Questions

8 questions

System design interview questions with an infrastructure and operability lens — scaling, reliability, and trade-off reasoning for the kind of design rounds DevOps and platform roles actually run.

How would a self-service CI/CD platform handle a team that's on a fundamentally different tech stack the golden path doesn't cover well?

ExpertCI/CD8 min

How would you measure whether a self-service CI/CD platform is actually succeeding, beyond just "teams are using it"?

AdvancedCI/CD7 min

How would the self-service CI/CD platform design change if the organization had 1,000 teams instead of 100?

ExpertCI/CD8 min

Design an alerting and on-call paging system for a company running services across 3 regions, where the paging system itself must not go down along with the region it's monitoring.

ExpertObservabilitySRE14 min

Design a centralized logging platform for an organization running roughly 500 microservices across multiple Kubernetes clusters, where engineers currently can't find logs during incidents.

ExpertKubernetesObservability14 min

Design a centralized secrets management system for an org currently scattering credentials across env vars, config files, and CI/CD tool stores, with no consistent rotation or audit trail.

ExpertSecurityDevSecOps14 min

Design a deployment orchestration system that lets any of your organization's 200 services safely adopt canary or blue-green deployments, without every team building their own rollout automation from scratch.

ExpertKubernetesPlatform Engineering14 min

Design a self-service CI/CD platform for an engineering org with roughly 100 teams, each owning multiple services, without a central platform team becoming a bottleneck.

ExpertCI/CDKubernetesPlatform Engineering15 min