Technical proficiency
Check fluency in the stack they claim: C#/.NET, Java, or COBOL, plus SQL joins, stored procedures, and version control workflow in Git or TFS branching.
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 languages and frameworks with version detail, writes non-trivial SQL from memory, and explains their branching and code review workflow.