Keith Rabois on Hiring

General Partner at Khosla Ventures

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General Partner at Khosla Ventures and member of the PayPal Mafia. Former executive at PayPal, LinkedIn, and Square. Known for his 'barrels vs. ammunition' framework and his contrarian, high-conviction approach to identifying and developing exceptional talent.

“The most important concept in hiring is the distinction between barrels and ammunition. Ammunition is people who can do great work when you aim them. Barrels are people who can take a vague idea and drive it to completion on their own. Most companies have plenty of ammunition and are starving for barrels.”

Keith Rabois has been an executive at PayPal, LinkedIn, and Square, and now invests in startups at Khosla Ventures. Across all of those experiences, he keeps coming back to one framework that he considers the most important concept in hiring: barrels versus ammunition.

"Ammunition is people who can do great work when you aim them. Barrels are people who can take a vague idea and drive it to completion on their own."

The distinction is simple but powerful. Ammunition is talented people who do excellent work when given clear direction. Barrels are the rare people who can independently take a vague idea, define the problem, build the plan, recruit help, drive execution, and ship. Most companies have plenty of ammunition and are starving for barrels.

"Most people vastly overestimate how many barrels are in their organization. A team of 50 might have three or four."

Rabois considers the number of barrels to be the binding constraint on any company's growth. You can have unlimited ammunition, but without barrels to aim it, nothing ships. His advice: when you find a barrel, hire them immediately, even if you don't have a defined role. Create one. The cost of a barrel sitting idle for a month is trivial compared to the cost of not having them at all.

"The single biggest constraint on any company's growth is the number of barrels it has."

The way to identify barrels is straightforward: give someone a project with vague instructions and a deadline. If they come back having defined the problem, built the plan, and shipped something — that's a barrel. If they come back with questions about what to do next — that's ammunition. Both are valuable. But barrels are the multiplier.

Philosophy

Core beliefs about hiring and talent

Rabois's most influential idea is the distinction between barrels and ammunition. Ammunition is talented people who can do great work when aimed. Barrels are the rare people who can take a vague idea and independently drive it to completion. Most companies have plenty of ammunition and not enough barrels. Barrels are the bottleneck to growth.

The most important concept in hiring is the distinction between barrels and ammunition. Ammunition is people who can do great work when you aim them. Barrels are people who can take a vague idea and drive it to completion on their own. Most companies have plenty of ammunition and are starving for barrels.

Rabois's most famous framework, developed across his time at PayPal, LinkedIn, and Square.

If you find a barrel, hire them immediately. Don't wait for the right role to open. Don't worry about headcount planning. Create a role. The single biggest constraint on any company's growth is the number of barrels it has.

Most people vastly overestimate how many barrels are in their organization. A team of 50 might have three or four. Everything else — no matter how talented — is ammunition. That's not an insult. Ammunition is valuable. But barrels are the multiplier.

Hiring Process

How they structure interviews and evaluations

Rabois advocates an aggressive, conviction-driven approach to hiring. When you find a barrel, move heaven and earth to get them. Don't wait for the perfect role to open up. Create the role. The cost of missing a barrel is far higher than the cost of creating a slightly redundant position.

The way to identify barrels: give someone a project with vague instructions and a deadline. If they come back having defined the problem, built the plan, recruited the help they needed, and shipped something — that's a barrel. If they come back with questions about what to do next, that's ammunition.

When I interview for barrel potential, I ask candidates to walk me through a project they drove end to end. I'm listening for specifics: did they define the scope? Did they recruit the team? Did they make decisions without asking permission? Did they ship? If they describe contributing to someone else's initiative, they're ammunition.

Interview Questions

Questions they ask candidates

Rabois's questions are designed to identify barrels — people who take ownership of ambiguous projects and drive them to completion without being managed. He probes for evidence of independent initiative and end-to-end execution.

Tell me about something you built or shipped from scratch — where you owned it from the initial idea through to delivery. Walk me through every major decision you made.

The barrel test: Rabois is listening for end-to-end ownership, not contribution to someone else's project.

Describe a time when you took on something ambiguous that nobody asked you to do. Why did you do it and what happened?

Tests for the initiative and ownership instinct that distinguishes barrels from ammunition.

What's the last thing you shipped, and what would you do differently?

Shipping is the ultimate barrel test. Rabois wants evidence of completed work, not works in progress.

What They Look For

Traits and signals that excite them

Rabois looks for people who have independently driven a project from concept to completion — not people who contributed to someone else's initiative, but people who owned the entire thing. That's the barrel signal.

People who have a track record of shipping — not planning, not analyzing, not contributing, but actually shipping completed work. Barrels get things across the finish line.

Candidates who take ownership of ambiguity naturally. When faced with an unclear situation in the interview, they start structuring the problem and proposing solutions rather than asking for more guidance.

Dealbreakers

Warning signs that concern them

People who need to be aimed — who do excellent work when given clear direction but have never independently identified a problem and driven the solution. These are ammunition, not barrels.

People who only describe their work in terms of contribution to larger efforts. 'I was part of the team that...' or 'I helped with...' is the language of ammunition. Barrels say 'I built this' and can tell you every decision they made.

Candidates who need detailed requirements before they can start. Barrels operate on vague direction and figure out the details themselves. If someone can't move without a clear spec, they'll never drive an initiative independently.

Signals to Watch

Subtle cues they pay attention to

Speed of decision-making. Barrels make decisions quickly and adjust as they go. Ammunition waits for someone else to decide. In the interview, you can observe this in real time by posing an ambiguous problem and watching how quickly someone starts structuring a response.

Frameworks

Mental models and structured approaches

Barrels vs. ammunition: ammunition are talented people who can do great work when directed. Barrels are people who can independently take a vague idea, build the plan, recruit help, drive execution, and ship. Most companies are bottlenecked by a lack of barrels, not a lack of ammunition.

Barrels vs. ammunition: every person you hire is one or the other. Barrels can independently take a vague idea and drive it to completion. Ammunition needs to be aimed. Your company's growth is capped by the number of barrels you have. Hire and develop barrels above all else.

Interviewer Tips

Practical advice for running interviews

When you find a barrel, hire them even if you don't have a role. Create one. The cost of a barrel sitting idle for a month while you figure out their project is trivial compared to the cost of not having them.

When you find a barrel, move fast and don't be constrained by headcount plans. A barrel without a defined role will find valuable work within days. A defined role without a barrel can sit empty for months and nothing changes. That asymmetry tells you everything about what matters.

Test for barrel potential by giving candidates progressively more ambiguous problems during the interview. Start specific and get vaguer. Watch when they get uncomfortable. Barrels get excited by ambiguity. Ammunition gets anxious.

Frequently Asked: Keith Rabois on Hiring

Interview questions Keith Rabois is known for asking candidates.

Tell me about something you built or shipped from scratch — where you owned it from the initial idea through to delivery. Walk me through every major decision you made.+

The barrel test: Rabois is listening for end-to-end ownership, not contribution to someone else's project.

Describe a time when you took on something ambiguous that nobody asked you to do. Why did you do it and what happened?+

Tests for the initiative and ownership instinct that distinguishes barrels from ammunition.

What's the last thing you shipped, and what would you do differently?+

Shipping is the ultimate barrel test. Rabois wants evidence of completed work, not works in progress.

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