The brilliant jerk interview question: how do you answer it?

In this article

1. Before you start
2. Why interviewers ask this
3. Brilliant jerk from first principles
4. Worked example
5. Trade-offs and edge cases
6. How to answer it in an interview
7. Common mistakes
8. Follow-up questions
9. Sources

Before you start

This page is one part of the engineering manager interview questions guide, and the round it belongs to is described in the people management round.

Why interviewers ask this

A manager who keeps a brilliant jerk pays in departures and silence, and a manager who removes one too fast may lose real talent. Interviewers use this question to see which mistake you lean toward, and whether you act on evidence instead of on a slogan. Candidates report it in engineering manager loops, usually as a hypothetical: your best engineer ships fast and belittles teammates in code review.

A weak answer picks a side with no reasoning: "culture comes first" or "results are results." A strong answer separates behavior from output, checks the facts before judging, states what the team loses, and describes an escalation you could actually run. A Staff-level answer also says when the situation is different, for example when the person is the only expert on a system, and what you would do about that dependency.

Brilliant jerk from first principles

Brilliant jerk

A brilliant jerk is a highly capable employee who treats colleagues badly, so that the cost to teamwork outweighs the individual's output, a term popularised by Netflix's 2009 culture deck. The label describes behavior toward people, not skill and not a blunt but respectful style.

Toxic worker

A toxic worker, in the Harvard study cited below, is a worker who harms a firm's people or property and was fired as a result. The study counts harm such as theft, fraud, bullying, violence or harassment, not mere rudeness.

In plain words

Picture a soccer team with a star striker who insults teammates. He scores often. Over time, midfielders stop passing to him, and some ask to leave. The team scores less than the goal count suggested. The analogy breaks in one place: goals are easy to count, while the damage on a team is spread out and slow to show.

Here is the same idea in one precise sentence. A brilliant jerk is a person whose measurable output is high and whose behavior lowers other people's output, so the manager must weigh both sides.

Netflix states its position in the 2017 version of its culture memo: "On a dream team, there are no 'brilliant jerks.' The cost to teamwork is just too high." It adds that "brilliant people are also capable of decent human interactions, and we insist upon that." Press coverage of the 2017 memo (The Register, 2017) quotes the same lines. The wording differs between the older deck and later memos, so quote it carefully and attribute it to Netflix's culture memo.

Step 1: What the Harvard study measured, and what it did not

The most-quoted evidence is a Harvard Business School working paper by Housman and Minor, which studied nearly 60,000 workers across 11 firms (Working Knowledge, 2016). Its toxic worker is someone who damaged company property or other people, through theft, fraud, bullying, workplace violence or harassment, and was fired for it (Harvard Gazette, 2015). Rudeness alone was not the measure.

The jobs were front-line customer-service roles, not engineering, and about 5 percent of workers had serious incidents over three years (Harvard Business School Working Knowledge, 2016). That article also reports that these workers were, on average, very good on productivity. This is the dilemma: output alone selects for them.

So the study supports a narrower claim than the question implies. Harm that gets someone fired costs more than a top performer adds. Use it as evidence for the direction of your answer, and say that it comes from service work. You now know what the evidence covers; next is what it costs.

Step 2: The costs are larger than the salary line shows

The Harvard Business School team estimated that avoiding one toxic hire saves a company about 12,489 dollars, against about 5,303 dollars of cost savings from hiring a superstar in the top 1 percent of performers (Harvard Gazette, 2015). The ratio is about 2.36.¹ The authors conclude that avoiding a toxic worker enhances performance much more than swapping an average worker for a superstar.

Two cautions apply. The toxic-worker figure is based on turnover and the cost of new hires and training, and the Working Knowledge article says it is "likely on the low end"; the Gazette notes it leaves out litigation, regulatory penalties and lost morale. And the two figures come from different comparisons, so they should not be added or subtracted.

The second cost is spillover. Spillover is the effect of one person's behavior on coworkers. A companion paper finds the negative effect spreads almost immediately and vanishes within a month of no longer being exposed. The cost is real, and so is the recovery.

Step 3: Judge the behavior, not the person or the output

The third step is deciding whether you really have a brilliant jerk. The test is behavior toward people: does this person demean, humiliate or shut out colleagues, and do others change how they work to avoid them? Directness is not the test. A blunt reviewer who criticizes the code, stays respectful and accepts pushback is a different case, as the comparison below shows.

Gather facts before acting. Read the review threads, ask peers in one-on-ones, and look at attrition and who stopped speaking in meetings; the team health signals help. Then apply the keeper test, which the 2017 version of Netflix's memo phrases as whether a manager would try hard to keep someone who was thinking of leaving. If your honest answer is "no, because of how they treat people," you have a behavior problem, not a talent problem.

Be clear about your own bias: one loud complaint is not a pattern, and a pattern is not proof of intent. You now have a judgment you can defend. The last step turns it into action.

Step 4: Respond with a ladder, not a verdict

The response is a ladder you can run. First, give private, specific feedback: name the incident, the effect on others, and the change you expect (one-on-ones and hard feedback covers the mechanics). Second, write down the expectation and a review date, and say plainly that strong output does not excuse the behavior. Third, protect the team during the review: change reviewers, pair work, or reduce exposure to the person.

The ladder is for rudeness and contempt. Harassment, discrimination, threats or violence are not a coaching matter: report them to human resources at once so the company can investigate under its legal obligations, and the fair-chance steps do not apply.

If the behavior continues after a fair chance, remove the person from the team through your company's process, working with human resources. The path overlaps with handling a low performer, but the trigger differs: the low performer misses outcomes, while the brilliant jerk meets them and damages the people around them. A conflict between two peers is another case again; see two engineers who can barely stand each other.

1 · Evidence2 · Costs3 · Behavior4 · LadderReplay

Step-by-step description

1. Know what the study measured.
2. Count the hidden costs.
3. Judge behavior, not output.
4. Respond in escalating steps.

• The study measured only workers fired for harming people or property, not rudeness.
• Hidden costs include turnover, manager time, and spillover to coworkers.
• The response ladder runs from private feedback to a written expectation to removal.

The study measured only workers fired for harming people or property, not rudeness. Hidden costs include turnover, manager time, and spillover to coworkers. The response ladder runs from private feedback to a written expectation to removal.

Worked example

Take a hypothetical team of six engineers with one brilliant jerk. All inputs below are illustrative assumptions, not measurements. Two colleagues leave within a year and each replacement costs 40,000 dollars. The manager spends five hours a week for 48 weeks on the problem at a loaded cost of 100 dollars an hour, where loaded cost is salary plus benefits and overhead per hour. The five teammates each cost 150,000 dollars a year loaded, and the drag on their output is 5 percent. The jerk's extra output is worth 60,000 dollars.¹

The pieces come to 80,000 dollars of replacement cost, 24,000 dollars of manager time and 37,500 dollars of productivity drag on the five teammates, a total of 141,500 dollars against 60,000 dollars of extra output, a net of minus 81,500 dollars.¹ Change the assumptions and the sign can flip, which is why a manager gathers facts first.

The study figures come from the Harvard Gazette; the ratio and the team rows are computed.¹

Text description of the diagram

• Avoiding a toxic worker is worth about 2.36 times a top 1 percent superstar's gain.
• Avoiding one toxic worker was worth 12,489 dollars in the study.

Avoiding a toxic worker is worth about 2.36 times a top 1 percent superstar's gain.¹

Trade-offs and edge cases

Reported practice differs across companies. Netflix states a firm rule. Some organizations that prize individual output knowingly tolerate difficult stars, and that is a cultural choice, not a mistake of logic. In an interview, take a position and show you understand the trade-off.

Edge cases matter. A blunt engineer who stays respectful is not a brilliant jerk, and treating directness as abuse produces polite teams that hide problems. If the person is the only expert on a critical system, start documenting and sharing that knowledge now, because dependence is a risk in itself. If the person outranks you, escalate with facts to your manager and human resources. The study is about front-line service roles, so there is no engineering-specific study behind these numbers. Finally, screening beats curing: hiring as an engineering manager and reference checks should ask how a candidate treats people under pressure. Your answer also reflects your management philosophy.

Text description of the diagram

• A blunt colleague who stays respectful is not a brilliant jerk.
• The study measured only workers fired for harming people or property.

How to answer it in an interview

The spoken structure: say you check the facts, describe the ladder, name the cost to the team, and state where you would not act.

Common mistakes

• "The Harvard study proves brilliant jerks cost twice as much." (wrong) The study measured workers fired for harm in service jobs. (right) "A Harvard study of fired toxic workers in service roles found avoiding one was worth more than adding a superstar."
• "Toxic people are low performers." (wrong) The study found they were, on average, very productive. (right) "That is the dilemma: output hides the damage."
• "I would fire them right away." (wrong) It skips facts and a fair chance. (right) "I give feedback, set a dated expectation, then decide."
• "Blunt engineers are brilliant jerks." (wrong) Directness is not demeaning people. (right) "I separate respectful bluntness from contempt."

Follow-up questions

What is a brilliant jerk?

A brilliant jerk is a highly capable person who treats colleagues badly, in Netflix's usage, so that the cost to teamwork outweighs the output. It describes behavior toward people, not skill.

Why does Netflix not tolerate brilliant jerks?

The 2017 version of Netflix's culture memo says the cost to teamwork is too high and that brilliant people can also be decent, which it insists upon. It pairs the rule with the keeper test.

How do you handle a brilliant jerk on your team?

Verify the behavior, give private specific feedback, write an expectation with a review date, protect teammates, and remove the person if it continues. The low performer answer shares the documentation habits.

Is a blunt engineer a brilliant jerk?

No. A blunt engineer who criticizes work but stays respectful and accepts pushback is giving direct feedback. The label fits people who demean or shut out colleagues.

How do you screen for brilliant jerks when hiring?

Ask references how the candidate treated peers under pressure, and ask the candidate to describe a disagreement and how the other person felt about the outcome. Treat one comment as a signal to probe, not a verdict.

Sources

1. Toxic Workers (Harvard Business School Working Paper 16-057), Housman and Minor — SSRN (Harvard Business School), 1 Nov 2015
2. Hazard Warning: The Unacceptable Cost of Toxic Workers — Harvard Business School Working Knowledge, 18 Jan 2016
3. Those toxic co-workers — Harvard Gazette, 1 Nov 2015
4. Workplace Design: The Good, the Bad, and the Productive (Working Paper 16-147) — Harvard Business School (Housman and Minor), 1 Jun 2016
5. Netflix updates its culture document (press coverage of the 2017 memo) — The Register, 22 Jun 2017
6. Netflix culture memo, Dream Team section (mirror of the 2017 text) — Slab Library (mirror of the June 2017 memo text), 22 Jun 2017