RadixArk
From company careers site
AI Researcher
- Location
- San Francisco; Palo Alto Office; Singapore
- Work mode
- Hybrid
- Employment type
- Full-time
- Salary
- $2,00,000 – $4,00,000 / year
About the job
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
From RadixArk's careers page (Ashby), checked 11 Nov 2026.
How to apply
- Select Apply on radixark.com. It opens RadixArk's own application form in a new tab, run on Ashby.
- Fill in the form and upload your résumé there. Jobiwork never sees your application.
- RadixArk will reply to you directly. No real employer asks you for money to apply.
Posted 11 Nov 2026 · checked 11 Nov 2026 · Report this job
