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Member of Technical Staff - Research

Polymath· Engineering
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Hybrid (San Francisco, CA)$150k - $300kFull-timePosted 3mo ago

About the role

Founding Member of Technical Staff - Research at Polymath, an applied research lab focused on long-horizon autonomous agents. Role involves core research and engineering to design, evaluate, and productionize environment benchmarks and post-training agents, with opportunities to publish and impact frontier AI capabilities.

Responsibilities

  • Investigating failure modes of frontier models
  • Creating rigorous benchmarks that evaluate long-horizon reasoning and tool use in dynamic environments
  • Post-training agents that can reason, plan, and act over extended time horizons
  • Publishing research
  • Wearing multiple hats: building benchmarks, creating environments, writing production code, and running rigorous experiments

Qualifications

  • Strong engineering & research fundamentals
  • Prolific user of AI tools
  • Experience post-training frontier models
  • Experience shipping production-quality code
  • Track record of publications

Skills

Required:Engineering fundamentalsResearch fundamentalsPost-training model experiencePublication track record

Benefits

  • Comprehensive health, dental, and vision insurance
  • Free meals with the team
  • Free Bay Club membership (right next door to our Embarcadero office)
  • Commuter benefits
  • 401(k)
  • Unlimited PTO
  • Top of the line tech
  • Frequent team activities and outings
Last updated Oct 25, 2026. Interested? Apply on the company site.
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About Polymath

Simulated worlds to train & evaluate long-horizon AI agents

We’re heading towards a future where AI agents will be able to perform useful work over long horizons, with little or no human supervision. To increase the reliability, performance, and safety of autonomous agents, they must be trained in simulation environments that reflect the real world. Polymath builds simulated worlds for agents to practice and learn through experience. We're a team of researchers and engineers from UC Berkeley, Hume AI, Plaid, and Amazon. We have years of experience post-training frontier models in industry, and building large scale data systems. Polymath is backed by Y Combinator.

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