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AI Researcher

RadixArkRemote - San Francisco, Palo Alto Office, Singapore

About the role

We’re looking for researchers and engineers who love training the best AI models. You’ll work on the full training stack, from data and recipes to post-training, RL, and evaluation, alongside a small, high-caliber team building at the frontier of AI systems.

What you might work on

  • Pre-training, mid-training, and post-training of large models

  • Reinforcement learning, reasoning, and reward modeling

  • Data, evaluation, and the research behind making models measurably better

You might be a fit if you

  • Have a track record of research or engineering on large-model training

  • Care about shipping results, not just publishing them

  • Are curious, direct, and comfortable with ambiguity

Apply for this role Opens jobs.ashbyhq.com — verified as the employer's own application page

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Where this listing came from

  1. 11 Nov 2026Ats Boards first sighting

Seen on 1 board over 0 days.