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Build a category-defining company with us

Karumi is a team that moves at lightspeed, backed by Y Combinator, building AI agents that understand a software product and demo it live. We hire people who ship, go deep, and own what they build.

See the open roles Write to the founders

Backed by Y Combinator

Toni Lopez and Pablo Omenaca, Karumi's founders, holding a Y Combinator sign

Life at Karumi

A focused team doing hard things, fast

  • Founders next to you

    No layers between you and the people who started the company. You hear the customer, argue the roadmap and make the call.

  • Ship in week one

    Something of yours goes to production in your first week. We iterate in front of customers, not in a backlog.

  • New York, Madrid, San Francisco

    Defining a category takes communication at the speed of light. We work in person, have the hard discussions every day, and decide fast.

What we look for

People who can expand

  • You ship

    You would rather put something rough in front of a customer today than something perfect in a doc next month.

  • You go deep on the problem

    Browser automation, agents that talk in real time, a knowledge brain that maps entire products. The hard parts are the job.

  • You own it

    You take a problem end to end, from the first customer call to production and back. Hard opinions loosely held, and default to action.

  • You leave your ego at the door

    The best idea wins, whoever had it. You say what you think, change your mind when the facts do, and tell us when we are wrong.

How we work

Operating principles

  1. Do things that don’t scale
  2. Ego is the enemy
  3. Seek the truth
  4. Hard opinions loosely held
  5. 80/20 rule
  6. Fail often, fail fast, fail cheap
  7. No BS
  8. Radical transparency
  9. Default to action
  10. Seek alpha

We're hiring

Join us

See all roles on Y Combinator

How to apply

Short process, straight to the founders

  1. Apply

    Apply to a role on Y Combinator, or email the founders what you have built. A link beats a cover letter.

  2. Meet a founder

    A first call with Toni or Pablo: what you have built, what you want to build next, and what we are working on.

  3. Build together

    A practical session on a real problem from our work, the way you would tackle it on the job. No brainteasers.

  4. Decide fast

    Meet the team, ask us anything, and get an answer quickly. We move in days, not months.

No role with your name on it? Send what you have built to [email protected]. The founders read every email.

An engineer in Spain who wants to go to the US? Hackspain is our direct line from Madrid.

Join us

Come build what’s next.

See the open roles Write to the founders