The Bar Raiser Is Not There to Raise the Bar on Candidates
After a bad hire, most orgs reach for harder questions and one more round. That is the wrong lever. Your hiring bar is capped by the evidence your interviewers produce, not by the candidates you see.
Every engineering leader I know has had roughly the same reaction to a hire that did not work out. Six months in it is obvious the person is not going to make it, the postmortem gets scheduled, and the conclusion lands in the same place every time: we need to raise the bar. Harder questions. One more round. Put a tougher interviewer in the loop.
I have sat in a lot of hiring debriefs, and I have been the Bar Raiser in a good number of them. That reaction is the most common and most expensive move in hiring, and it comes from misreading what a bar actually is.
What people think the role is
The public description of a Bar Raiser is straightforward enough: a trained interviewer from outside the hiring team, with veto power, whose job is the long-term standard rather than this quarter's headcount. Most people read that and picture the same thing. The hard one. The person brought in to break the candidate.
That is not the job, and it is not what the veto is usually for. In my experience the veto rarely turns on the candidate at all. It turns on the loop. The room did not produce enough to say yes with, and saying yes anyway is how you end up in the postmortem six months later.
A hiring bar is not a difficulty setting. It is a claim about what you can prove.
The problem almost nobody names
Here is the thing that took me longest to see, and that I now think is the single most underrated fact about hiring: your hiring quality is capped by what your interviewers can produce, not by who walks through the door.
You cannot select above the resolution of your own instrument. And most interview loops are running an instrument with two well-known defects.
Notes nobody could disagree with
Read a typical debrief packet and you will find lines like "strong communicator" and "seemed shaky on system design." Those look like findings. They are not. There is nothing in them a colleague could contest, because there is no fact in them about what happened in the room. A rating without a transcript is a vote, and a debrief made of votes is a meeting where confident opinions get averaged.
The seniority discount
When the notes are impressions, the room has no way to resolve disagreement on the merits, so it resolves it on rank. The most senior person's read wins, or the loudest one's does. That is not calibration. That is deference wearing calibration's clothes, and the junior interviewer who actually wrote down what the candidate said gets quietly overruled by someone who wrote down how they felt.
Both defects have the same shape. The room is deciding without evidence, and it does not notice, because everyone came out of the interview with a genuine impression and impressions feel exactly like knowledge.
Why turning up the difficulty makes it worse
Now put the standard fix on top of that. Harder questions, an extra round, a reputation for being brutal.
Harder questions raise variance, not signal. They widen the spread of outcomes without improving anyone's ability to say why a candidate landed where they did. They also start rewarding the wrong thing: familiarity with a genre of question, comfort under theatrical pressure, willingness to perform. And they shift the room's attention onto the interviewer, who is now demonstrating range instead of collecting evidence.
Add a round and you pay for it twice. You slow the loop down, which loses you the candidates who have other offers, and you add one more set of unfalsifiable notes to average. You have made the instrument bigger without making it sharper. What you get at the end is "I liked them," arrived at with more effort.
What actually raises the bar
All four of these are on your side of the table. That is the point. The candidate pool is not the variable you control. The loop is.
1. Make evidence the unit of a debrief, not opinion
One rule changes more than anything else on this list: no rating without at least one thing the candidate actually said or did, written down close to verbatim. Not a summary. The thing itself. If an interviewer cannot produce that, they have an impression, and impressions do not get a vote. This feels harsh for about two loops and then it becomes the norm, because the first time a room argues productively about a specific quote instead of vaguely about a vibe, everyone can feel the difference.
2. Assign the competencies before the loop, not after
Most loops are assembled from whoever was free. Each interviewer then covers whatever they personally find interesting, which is usually the same three things, and the overlap is invisible until the debrief. Assign each interviewer one or two areas and expect evidence on those specifically. Now the gaps are visible before you decide, and you can see the thing nobody probed instead of discovering it in the person's second month.
3. Put someone in the room who does not need the seat filled
This is the actual mechanism behind the Bar Raiser, and it is independence, not toughness. A hiring manager with an open role and a slipping roadmap is under real pressure, and that pressure is legitimate. It is also precisely why they should not be the last word. The person with no stake in this particular seat is the only one who can ask the uncomfortable question about the evidence without it costing them anything.
4. Debrief the interviewers, not only the candidate
Almost no org does this. Read each other's notes and talk about the notes. The interviewer who always turns in three lines of adjectives is a fixable defect, and in most companies nobody has ever told them, because interview feedback is the one kind of work product that never gets reviewed. Fix five interviewers and you have raised your bar more than any question bank ever will.
What it costs and what it buys
It is slower per interview to write down what someone actually said. It is faster overall, because you stop re-running loops, you stop relitigating decisions nobody can defend, and you stop absorbing the cost of the hire that did not work.
You also get something quieter and more valuable. A "no" you can explain. A "yes" that survives contact with the next twelve months. And a version of "raise the bar" that you can actually act on this quarter, rather than an instruction to be vaguely harsher and hope.
So when the next hire goes wrong, resist the meeting where everyone agrees to be tougher. Ask a different question instead: did anyone in that debrief write down something a colleague could have argued with? Most of the time the honest answer is no. That is the bar problem, and it belongs to you, not to the market.