Post-Training AI Research Engineer – RL & Agentic Infra

Fundamental AI Research Institute in San Francisco is seeking researchers experienced in LLM post-training, agentic infrastructure, RL environments, and evaluation harnesses to accelerate flagship AI research. Responsibilities include building and scaling post-training platforms and RL infra, developing benchmarks, contributing to deployment of large-scale models, and publishing results at top conferences.

Join a fast-growing team with ample GPU resources and a collaborative culture, offering a