Member of Technical Staff (Models)

San Francisco

As a Member of Technical Staff on Models, you'll own the post-training loop that improves the performance of our AI Employees. You will be defining how we train models to do mission critical work in the real world. **Areas you may work in:** * Post-training and fine-tuning * Turning agent traces and expert feedback into training data * Reward modeling and graders for non-verifiable outcomes * Distillation into smaller, faster, cheaper models * Designing and running training experiments **You may be a good fit if you:** * Have trained or fine-tuned models and shipped the result into a product * Have hands-on experience with SFT, preference optimization, or RLHF * Can read traces and tell whether a metric measures the thing that matters * Have strong software engineering fundamentals alongside ML depth * Want to work in person in San Francisco **Even better:** * You've adapted open-weight models to a specialized domain * You've built training data or evaluation infrastructure * You contribute to open source projects