Technical proficiency
Check hands-on command of Terraform or Pulumi, Kubernetes primitives, and CI runners (GitHub Actions, GitLab, ArgoCD); ask what they wrote versus inherited from a platform team.
Evidence to listen for
- Command of the languages, frameworks, and data tools the role actually uses
- Understands correctness, performance, and failure modes, not just syntax
- Has opinions on testing and can justify them
- Reads and reasons about code they did not write
Five-point scoring guide
Cannot work independently; fundamentals are missing.
Weak fundamentals; output needs heavy review.
Competent for the role; needs guidance on complex or unfamiliar work.
Strong practitioner; handles hard problems with little guidance.
Names modules, Helm charts and pipeline stages they authored, explains state locking, drift and rollout strategies without hedging.