How to hire prompt engineers
To hire a prompt engineer, test prompts against cases they haven't seen: live prompt writing, a real assistant to fix with AI tools and a follow-up on hidden tests.
- 1✓AI screening interviewA prompt she took from demo to productionAriaReport ready
- 2✓Live prompt writingSupport emails in, strict JSON outMaxReport ready
- 3✓Build and testA support assistant, scored on 60 hidden casesNixReport ready
- 4✓Follow-upHer prompt, her tests and the assistant itselfNixReport ready
The prompt engineer interview process
Four rounds, each with its own report. Every claim is captured and scored against your rubric.
Prompt engineer skills to assess
Score every candidate on the same six skills, rated against evidence from the rounds.
- Prompt writing
- Structured output
- Testing prompts
- Handling tricky inputs
- Choosing models
- Working with AI tools
Prompt engineering interview questions
Use them in your own loop, or let Aria, Max and Nix ask them, follow up on the answers and score them.
Tell me about a prompt you took from demo to production.
How did you know the fix held up, and wasn't just tuned to your test set?
Write a prompt that pulls the order number, issue type and urgency from a support email, as strict JSON.
What happens when an email mentions two orders?
Make a support assistant follow the refund policy, resist manipulation and use the cheapest model that holds up.
The customer wrote in Spanish and the assistant answered in English. Why?
You switched to a smaller model. What would make you switch back?
Integrity in every round
Bad Actor Detection flags calls to AI models outside the allowed list, a second voice or screen, and work pasted from outside the workspace.
Hidden test cases
Every assistant is scored on cases the candidate never sees, so one lucky run doesn't pass.
We evaluate. You decide.
Hello Recruiter evaluates and organizes the evidence. Your hiring team decides who moves forward.
Frequently asked questions
How do you hire and interview prompt engineers?
Test prompts against cases they haven't seen. Hello Recruiter runs a live prompt-writing round with test inputs and structured output, a real task in the candidate's own AI tools, and a follow-up on the system prompt, a hidden test case and a model comparison.
What should a prompt engineering test include?
Realistic inputs, a required output format such as JSON, hidden test cases the candidate didn't tune for, and a comparison across models, so results reflect how well the prompt holds up rather than one lucky run.
How does Hello Recruiter detect cheating or misrepresentation?
Every round is monitored for integrity signals such as calls to AI models outside the allowed list, a second voice or a second screen, and answers or work pasted from outside the workspace. Each signal is timestamped in the candidate's integrity report, and claims are cross-checked across rounds.
What does the hiring team get after each round?
A report for every round: an AI score out of 100, evaluation criteria marked Met, Not met or Not yet evaluated, skills rated Very strong, Strong, Weak or Very weak, a risk level, and any fraud signals with timestamps. Hello Recruiter evaluates; the hiring team decides.
Run this loop on your next prompt engineer hire
Precision hiring, with the evidence behind every pick.
