Senior Applied Scientist, Reinforcement Learning

Hippocractic AI

Menlo Park, CAJobNo compensation foundPosted 3w agoVerified open 3 days ago

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At a glance

Compensation

No compensation found

Location

Menlo Park, CA

Work Authorization

Not specified

Requirements

Credentials this posting asks for.

Doctorate

Job overview

Hippocractic AI is hiring a Senior Applied Scientist, Reinforcement Learning. Hippocratic AI seeks a Senior Applied Scientist to lead reinforcement learning and on‑policy distillation post‑training pipelines, improving clinical reasoning, safety, and alignment of large language models used in healthcare. The role involves designing methods, building reward models, creating simulation environments, automating loops, running experiments, and collaborating across research, engineering, and clinical teams.

Key focus areas include Design RL and OPD post‑training methods, Build and evaluate reward models, verifiers, and LLM‑as‑judge pipelines, and Develop conversational AI environments and simulations for healthcare RL training with synthetic data.

Important skills include Reinforcement Learning, Clinical Reasoning, Experimentation, On-Policy Distillation, LLM Post-Training, and Reward Models.

Skills & qualifications

RequiredNice to have

Skills

Reinforcement LearningClinical ReasoningExperimentationOn-Policy DistillationLLM Post-TrainingReward ModelsVerifiersLLM-as-Judge PipelinesConversational AI EnvironmentsSimulations for Healthcare RL TrainingSynthetic DataAutomate Post-Training Loops With AgentsRun Rigorous ExperimentsCollaborationPythonPyTorchRLHFRLVR

Qualifications

MS or PhD in CS or Relevant Field3+ Years Experience in NLP, LLM Training, or RL1+ Years Experience in RL for LLM Post-TrainingExperience With Large-Scale (50B+ Parameter and Multi-Node) LLM Training

Full job description

About Us Hippocratic AI is the leading generative AI company in healthcare. We have the only system that can have safe, autonomous, clinical conversations with patients. We have trained our own LLMs as part of our Polaris constellation, resulting in a system with over 99.9% accuracy.

Why Join Our Team Reinvent healthcare with AI that puts safety first. We’re building the world’s first healthcare‑only, safety‑focused LLM — a breakthrough platform designed to transform patient outcomes at a global scale. This is category creation.

Work with the people shaping the future. Hippocratic AI was co‑founded by CEO Munjal Shah and a team of physicians, hospital leaders, AI pioneers, and researchers from institutions like El Camino Health, Johns Hopkins, Washington University in St. Louis, Stanford, Google, Meta, Microsoft, and NVIDIA.

Backed by the world’s leading healthcare and AI investors. We recently raised a $126M Series C at a $3.5B valuation, led by Avenir Growth, bringing total funding to $404M with participation from CapitalG, General Catalyst, a16z, Kleiner Perkins, Premji Invest, UHS, Cincinnati Children’s, WellSpan Health, John Doerr, Rick Klausner, and others.

Build alongside the best in healthcare and AI. Join experts who’ve spent their careers improving care, advancing science, and building world‑changing technologies — ensuring our platform is powerful, trusted, and truly transformative.

Location Requirement

We believe the best ideas happen together. To support fast collaboration and a strong team culture, this role is expected to be in our Palo Alto office five days a week, unless otherwise specified.

About the Role LLM post-training is where raw capability becomes reliable, safe behavior — and in healthcare, the stakes are as high as they get. You'll own the Reinforcement Learning (RL) and On-Policy Distillation (OPD) post-training pipeline end to end, to improve our models' clinical reasoning, safety, and alignment. Your models will be deployed to interact with millions of patients across diverse clinical use cases.

What You’ll Do

Design RL and OPD post-training methods (RLHF, RLVR, OPD, etc.)
Build and evaluate reward models, verifiers, and LLM-as-judge pipelines
Develop conversational AI environments and simulations for healthcare RL training with synthetic data
Automate post-training loops with agents (auto-research)
Run rigorous experiments to understand what drives post-training gains
Collaborate with research, engineering, and clinical teams

What You Bring

MS or PhD in CS or relevant field
3+ years or experience in NLP, LLM training, or RL
1+ years experience in RL for LLM post-training
Experience with large-scale (50B+ parameter and multi-node) LLM training
Strong Python and PyTorch coding skills
Experience with RLHF, RLVR, LLM-as-judge or similar methods for LLM post-training

Please be aware of recruitment scams impersonating Hippocratic AI. All recruiting communication will come from @ hippocraticai.com email addresses. We will never request payment or sensitive personal information during the hiring process.

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