Research Engineer Post Training All Industry Levels Jobs in San Francisco, CA

About the Role This role is responsible for building and strengthening the engineering foundations that our post-training research teams depend

As a Research Engineer on our Post-Training team, you'll train our base models through the complete post-training stack to deliver the production Claude models that

About the Role As a Research Engineer / Scientist, you will research and develop improvements to our models.

across post-training.

About Hedra Hedra is a research and infrastructure lab advancing post-training and inference for multimodal and physical AI.

We’re hiring a Founding ML Research Engineer to work work through the full stack across data, pre-training, post-training & evals for training Generalist

You’ll work closely with researchers and engineers across post-training and the broader research organization.

As a Research Scientist working on Safety Post-Training you will develop and apply post-training methods and interpretability techniques to make frontier

We are looking for Research Scientists and Research Engineers with expertise in LLM post-training (SFT, RLHF, reward modeling).

Our work spans post-training open-weight models for specialized capabilities and pioneering new approaches to voice AI, turning research breakthroughs into reliable

We recently post-trained our first model built for legal work, and we’re now building the team to scale up our post-training efforts.

Underneath that is the most powerful engine you could ask for, which has been used to post-train multi-100B language parameter models on TPU, post-train robotics

, research, or AI safety Hands-on experience evaluating, post-training, or deploying language models or agentic systems Experience

/ post-training, or evals; and researchers with real depth in developing frontier biomedical AI capabilities.

, research, or AI safety Hands-on experience evaluating, post-training, or deploying language models or agentic systems Experience