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Staff Full-Stack Engineer (AI Data)

horizonai talent • San Francisco Bay Area
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AI Summary

Seeking a Staff Full-Stack Engineer to build critical systems for a leading audio-data research company. You will own technical calls, ship products 0-to-1 across the stack, and manage terabytes of audio data. Requires 6+ years of full-stack experience, fluency in TypeScript and Python, and proven 0-to-1 product ownership. This is an onsite role in San Francisco offering competitive base salary, equity, and H1B sponsorship.

Key Highlights
Own technical calls and ship products 0-to-1 across the full stack.
Build systems that process terabytes of audio data for AI training.
Significant equity and staff-level authority in a rapidly growing AI startup.
Key Responsibilities
Own the technical calls for the organization.
Stay hands-on-keyboard while shipping products 0-to-1 across the stack.
Decide fast with limited data.
Build systems that move terabytes of audio.
Technical Skills Required
TypeScript Python Full-Stack Development
Benefits & Perks
$220K–$260K base plus equity
H1B visa sponsorship
Five days a week onsite in San Francisco
Nice to Have
Computer Science degree from a "Top 30" US program (or equivalent)
Real time at a startup while it was scaling hard.

Job Description


About the Company


Everyone's building on top of the models. Almost nobody's fixing the thing they're starved of - data. This is the company doing it. I'm running a search for a Staff Full-Stack Engineer at the first dedicated audio-data research company - and it's one of the rare AI seats where the traction is already real, not a pitch. Founded in 2024 by ex-Scale AI engineers who watched, up close, high-quality audio become the bottleneck for the next wave of AI. Here's the part that's hard to ignore: in under a year they've signed most of the FAANG names and the top AI labs as customers, hit eight-figure revenue, and raised a $50M Series B with NVIDIA on the cap table. Most startups spend three years trying to prove someone wants the thing. They're already past that.


About the Role


So the leverage is unusual. It's ~66 people, and the systems you'd build feed the models being trained at the biggest labs on earth. Your code, in the training pipeline for the frontier. That's not a line you get to write often. This is a build role, not a manage role. You'd own the technical calls for the org while staying hands-on-keyboard — shipping products 0-to-1 across the stack, deciding fast with limited data, and building systems that move terabytes of audio. Real staff-level authority, real equity while the number's still early, and research engineers next to you instead of three floors away.


Responsibilities


  • Own the technical calls for the organization.
  • Stay hands-on-keyboard while shipping products 0-to-1 across the stack.
  • Decide fast with limited data.
  • Build systems that move terabytes of audio.


Required Skills


  • A Computer Science degree from a "Top 30" US program (or equivalent)
  • 6+ years product-focused full-stack experience (they level on the way in, so a strong senior isn't ruled out).
  • Genuinely fluent in both TypeScript and Python.
  • Has actually owned something 0-to-1 - designed it, decided it, shipped it.
  • Did real time at a startup while it was scaling hard.


Disqualifiers


  • Pure big-tech experience with no startup exposure, tends not to translate here.
  • Inability to work in a limited-data, move-fast, own-the-outcome environment.


Pay range, Visa and compensation package


$220K–$260K base plus equity. Five days a week onsite in San Francisco. H1B visa sponsorship on the table for the right person.


If it's you, or it's someone you'd vouch for, drop me a message!


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