# Research Scientist, Safety Post Training

**Company:** [Scale AI](https://hotfix.jobs/companies/scale-ai)
**Location:** San Francisco, CA, New York, NY
**Role:** AI Research
**Salary:** $216k – $270k/yr
**Experience:** 3+ years
**Skills:** RLHF, Dpo, Grpo, Post-Training, Mechanistic Interpretability, Red-Teaming, Machine Learning, Generative AI, Model Alignment, Ml Prototyping
**Posted:** 2026-05-18

> Develop and apply post-training methods and interpretability techniques to improve safety and understanding of frontier AI systems. Requires 3+ years of ML experience, expertise in RL techniques like RLHF and DPO, and published research in generative AI.

## Job Description

## Responsibilities
- Design and run post-training pipelines to study how training choices affect model safety, robustness, and alignment properties.
- Develop interpretability-informed evaluations that reveal how and why models produce unsafe, deceptive, or otherwise undesirable behaviors, and use those insights to guide targeted mitigations.
- Collaborate with policymakers, engineers, and other researchers to translate post-training and interpretability findings into actionable safety standards, evaluation benchmarks, and best practices.

## Requirements
- Commitment to promoting safe, secure, and trustworthy AI deployments.
- Experience with post-training and RL techniques such as RLHF, DPO, GRPO, and similar approaches.
- A track record of published research in machine learning, particularly in generative AI.
- At least three years of experience addressing sophisticated ML problems, whether in a research setting or in product development.
- Strong written and verbal communication skills.

## Nice to Haves
- Experience with mechanistic interpretability, probing, or other techniques for understanding model internals.
- Familiarity with red-teaming or adversarial evaluation of post-trained models.
- Experience studying failure modes introduced or masked by post-training, such as reward hacking, sycophancy, or alignment faking.

## Compensation and Benefits
Compensation packages include base salary, equity, and benefits. Eligible roles receive comprehensive health, dental and vision coverage, retirement benefits, a learning and development stipend, and generous PTO. This role may be eligible for a commuter stipend.

## Similar roles

- [Applied AI Scientist, Small Language Model and AI Training](https://hotfix.jobs/jobs/b2c9619f-893f-4a1a-8ee8-9ed9b61c7747) - Postman - San Francisco, CA - $219k – $276k/yr
- [Post-Training Research Scientist](https://hotfix.jobs/jobs/e2fdc8cc-0043-4e30-b984-61023e8945ac) - Baseten - San Francisco, CA - $210k – $285k/yr
- [Research Scientist - LLM](https://hotfix.jobs/jobs/e788a094-f375-428c-ab78-5a329d5fbfd0) - Retell AI - Redwood City, CA - $225k – $400k/yr
- [Research Engineer, AI Safety & Alignment](https://hotfix.jobs/jobs/d9785929-0479-4683-bf71-ede40bef62d2) - character.ai - Redwood City, CA - $225k – $400k/yr
- [Machine Learning Scientist (All Levels)](https://hotfix.jobs/jobs/8fb90ed5-41f4-4bec-86e0-f26424470fb1) - Abridge - San Francisco, CA - $205k – $300k/yr

**Apply:** https://hotfix.jobs/jobs/cee41457-c979-40d2-83be-bd75ac539bef
**Canonical:** https://hotfix.jobs/jobs/cee41457-c979-40d2-83be-bd75ac539bef