DevOps Engineer Interview Experience at ServiceNow – 2025

MCQs cover Kubernetes fundamentals, CI/CD concepts, and ITSM (IT Service Management) basics given ServiceNow's core product domain, plus a scripting problem asking candidates to write a script that validates a deployment manifest against a set of required fields before allowing it to proceed in a pipeline.

This round covers Kubernetes multi-tenancy patterns for isolating different enterprise customers' workloads on shared infrastructure — specifically namespace-based isolation combined with network policies restricting cross-namespace traffic, and how to prevent one tenant's misbehaving workload from degrading performance for others (resource quotas and limit ranges). A follow-up asks how to design a CI/CD pipeline that supports both rapid internal iteration and the strict change-approval gates enterprise customers expect before any change reaches their environment — a two-track pipeline with fast internal staging deploys and a separate, gated promotion path to customer-facing environments requiring explicit sign-off is a strong answer.

This is a monitoring and alerting design discussion for a multi-tenant platform, specifically how to structure per-tenant SLO dashboards so an enterprise customer's platform team can self-serve visibility into their own instance's health without seeing other tenants' data.