Hamming
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Build the security layer for voice and chat agents.

Voice AI is everywhere and it's fragile.

We're building the layer that makes voice and chat agents safe to put in front of customers: testing, red teaming, and monitoring.

See open rolesThe co-op program
Hiring in
San Francisco, Austin, New York, London, and remotely
Trusted by
Banks, healthtech, and high-growth voice AI teams where a wrong answer is a liability
Backed by
Y Combinator, Mischief, AI Grant, Coalition, Coughdrop Capital
Releases
Simple feature requests, shipped
Voice agents tested
Concurrent test calls
Languages and accents

We break it first.

With permission. Before anyone else does.

This job
will change you.

We move at a pace most people can't handle. That's the point.

Not for you if:

  • You want a slow, predictable environment
  • You wait for permission to ship
  • You think "good enough" is good enough
  • You would rather write the report than find the bug
  • You're not hungry to be the best

Perfect for you if:

  • You want years of growth in months
  • You're obsessed with winning
  • You have a finding you are still proud of, and the write-up to go with it
  • You adapt to the newest tools to perform at your max
  • You thrive in fast, high-ownership environments

Fast is how we
find the truth.

Our metric is speed, because through continued iteration we reach the truth faster. This is what a Tuesday looks like.

  • Customer problems drive everything

    When a customer reports an issue, the fix is often in production by end of day. We don't queue requests. We solve them.

  • Reliable under pressure

    Our systems handle production calls around the clock. Fast means nothing if a healthcare agent fails at 2am. We build for the edge cases.

  • We keep it human

    Direct, respectful communication, low ego, and a team that stays fun while we do serious work.

Ship log · Tuesday#eng-releases
  1. A customer reports a misroute in the shared Slack channel.
  2. Reproduced with the call attached. Fix picked up.
  3. Fix in review. The failing call is now a regression test.
  4. In production. Customer told in the same thread.
  5. Red team run authorized on a bank's support agent. Findings due tomorrow.
  6. Co-op's first PR merged with its tests. It ships in this week's release.
Illustrative day. Releases are weekly; simple fixes ship within 24 hours.

What you
would catch.

Voice agents are going into banking, healthcare, and customer support, where a failure is a breach, not a bad review. You would build and run the systems that find those failures first.

  • Healthcare · refill lineCall 0412

    A caller asks for someone else's prescription.

    They sound like family and they sound in a hurry. Whether the agent holds the line is a patient-privacy question.

    You find out before a real caller does.

  • Banking · disputesCall 2207

    A caller says the branch already approved it.

    The agent has to verify identity, keep the account private until it does, and escalate cleanly. One wrong turn is a regulator's letter.

    Your run is the evidence the board asks for.

  • Support · release dayFriday 17:50

    A prompt change ships on Friday.

    Nothing in the demo looks different. Every finding from the last six months reruns against the new agent before Monday.

    The one that regressed is filed with the call attached.

Who you'd
work with.

The people who built Hamming ran production ML at Tesla, Meta, and Citizen, where a wrong answer reaches a real person. Everyone talks to customers, and the fix for what they say is often in production the same day.

Small, senior, high-output. Low-ego collaboration where teaching and learning compound into real growth, across San Francisco, Austin, New York, and London.

Tesla
The ML behind hundreds of millions a year in sales
Meta
Messenger, where failures at that scale are silent
Citizen
Real-time safety alerts to millions of people
Y Combinator
S24
Waterloo · Northeastern · Georgia Tech · Harvard
Where our co-ops come from
70%
Of the team are former founders

Co-ops
ship here.

Apply for the next term

  • The toolkit you will use for the rest of your career.

    Claude Code, Devin, Cursor, Copilot. Every frontier tool, fully paid, on the day it ships. Most co-ops leave writing software very differently than when they arrived.

  • Founder training, with a YC pass.

    High ownership, high standards, and access to the YC ecosystem and events. Co-ops have come from Waterloo, Northeastern, Georgia Tech, and Harvard; several came back for a second term.
  • “I joined Hamming because I want to build my own company one day, and this was the closest thing to founder training I've found: high ownership, high standards, and real customers using what you ship.”
    Jivan
    Waterloo
  • “The entire team invested time in helping me ramp up on the codebase, and interns get a high degree of ownership. By the end of my first week, I was already owning customer tickets.”
    Arjun
    Georgia Tech
  • “I literally doubled my knowledge and changed the way I write software. The team moves incredibly fast.”
    Dominik
    Waterloo
  • “I relearned everything and pushed way past my comfort zone. The bar is high and the growth is real.”
    Duc
    Northeastern
  • “Every day Hamming pushes me to level up. It's hard not to be motivated when everyone around you is shipping.”
    Darwin
    Harvard
  • “If you're looking for a fast-moving career to accelerate, work hard, push yourself, and expand your knowledge base at the edge of the technology you're in, you're in the right place.”
    Shayan
    Waterloo

Pick your
target.

We're hiring across engineering and go-to-market. If you want to ship fast, own systems, and make voice and chat agents safe at scale, we'd like to talk.

If you don't see a perfect fit, write to careers@hamming.ai with a short note on what you'd want to own here and something you've built that scaled fast and stayed reliable.

What you get.

  • Every frontier tool, fully paid

    Claude Code, Devin, Cursor, Copilot. When the next breakthrough ships, you have it day one. This is where you build the toolkit you'll use for the rest of your career.

  • Ownership from week one

    Own features, talk to real customers, ship to production. The tooling, feedback loops, and ownership are designed for leverage, and most engineers leave writing software very differently.

  • Years of growth in months

    Founder-level growth without starting a company, in San Francisco, Austin, New York, London, or remotely.

Our investorsY Combinator, AI Grant, Coalition, Mischief, and Coughdrop Capital.Learn about our seed funding round