5 May 20267 min read
Reference checks have decayed into a ritual. You call someone the candidate chose, who says something warm, and you write down that references were positive. Nobody learns anything, and everyone knew that going in.
They can be genuinely useful, and they are one of the few checks that scales across a border, because a former manager's account of how someone behaved for two years is not something an interview can substitute for. It takes three changes.
Ask for a specific person, not a reference
Do not ask for two references. Ask for the person who reviewed their work most closely at their last engagement, and separately for a colleague who depended on their output.
Naming the relationship rather than the role changes who you get. The candidate can still choose a friendly version, but they can no longer choose a person who was not close to the work, and the hesitation you sometimes get in response to this request is itself information.
Ask questions that do not have a polite default
Most reference questions can be answered kindly without lying, which is why they produce nothing. Replace them with questions where a good answer and a bad answer sound different.
- Of the engineers you worked with there, where would you put this person, and who was above them?
- What did they need help with, and did that change over the time you worked together?
- What kind of work would you deliberately not give them?
- How did they behave when a deadline was clearly going to be missed?
- If you were starting a team tomorrow, at what point would you call them?
The last question is the strongest one available. First hire, tenth hire and would not call are all easy things to say and they are hard to say generously if untrue.
Listen for what is not said
A reference who is enthusiastic about someone's reliability and silent about their technical judgement has answered your question. Ask the omitted thing directly and listen to the pause. Careful people avoid saying negative things about a former colleague, but very few will say a positive thing they do not believe when asked a direct question.
Similarly, note the difference between specific praise and general praise. Someone who tells you a story is remembering a real person. Someone who tells you the candidate was a pleasure to work with is being polite, which is not a reason for concern but is not evidence either.
Check the provider's references, not only the candidate's
When you hire through a partner, the provider is the more consequential relationship, and almost nobody checks it. Ask for two clients: one current, and one whose engagement ended.
The second request is the whole test. A provider who cannot name a single engagement that ended amicably either has never had one end or does not want you talking to them. The questions to the former client are narrow: how did the ending go, did you get the handover you needed, was the last invoice a dispute?
What a reference cannot do
It cannot tell you whether someone will succeed in your context, which is different in codebase, process and pressure from the one being described. It cannot substitute for a technical assessment. And it is a poor tool for a candidate early in their career, who may have only one previous manager and no ability to give a range.
Use it for the thing it is good at: behaviour over time. How they took feedback, what they did when work went wrong, whether people wanted them on the next project. Those are exactly the things a ninety-minute interview cannot reach and a remote engagement will expose within a quarter.
Do them before the decision, not after it
References are usually run after an offer has been mentally made, at which point everyone is looking for confirmation and a lukewarm answer gets rationalised away. Move them before the final conversation, treat them as one input among the interview and the work sample, and be honest with yourself about what you would do if the answers were mediocre.
If the answer is that you would hire anyway, skip the calls and stop wasting three people's time. If it is not, then run them properly, and treat a reference who declines to say anything beyond the dates as the meaningful signal it usually is.