Research Scientist

Fleet studies how environments produce intelligence. We believe intelligence is an emergent property of environmental pressures — the environment determines what capabilities develop, what behaviors survive, and what "good" looks like. We work with frontier labs on post-training across modalities — building benchmarks that expose where frontier models break, training recipes that close those gaps, and scalable oversight for long-horizon agents.

Backed by Sequoia Capital, Menlo Ventures, BCV, and SV Angel.

We're looking for a Research Scientist to join our core research team in SF. The work is open-ended: you'll study how environments produce intelligence, carry your own research threads, and collaborate directly with frontier labs.

• Benchmarks — identify where frontier models break and build the evaluations that expose those gaps
• Environment generation at scale — automated task and environment construction for agent training
• Denser reward signals and faithful simulations for long-horizon tasks
• Pushing best-in-class specialized models through better data and training recipes

• You carry your own research threads, each producing a concrete artifact: a paper, benchmark release, training recipe, or open-source code
• Direct collaboration with frontier labs

• Experience designing and running research experiments end-to-end
• High ownership — you manage your own research threads and are measured by what you produce

San Francisco (on-site). Highly competitive salary + equity.