AI Researcher
- LocationSan Francisco; Palo Alto Office; Singapore
- Work typeHybrid
- Salary200k to 400k USD a year
- EmploymentFull-time
- Posted11 November 2026
- SourceRadixArk's careers page (Ashby)
Live checkFirst seen 9 h ago; still listed on RadixArk's careers page 1 h ago.
About the role
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
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