AI Researcher

RadixArk • Palo Alto, CA

2d • $200,000 - $400,000

About The Position

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.

Requirements

• Have a track record of research or engineering on large-model training.
• Care about shipping results, not just publishing them.
• Be curious, direct, and comfortable with ambiguity.

Responsibilities

• Work on pre-training, mid-training, and post-training of large models.
• Work on reinforcement learning, reasoning, and reward modeling.
• Work on data, evaluation, and research to make models measurably better.

What This Job Offers

• Job Type: Full-time
• Education Level: No Education Listed