Drimva

Anthropic

Research Engineer, Production Model Post-Training

$350K–$500K

San Francisco, CA +5 · Full-time · Posted Apr 1, 2025

Location
San Francisco, CA
New York City, NY
Seattle, WA
New York, New York, United States
San Francisco, California, United States
Seattle, Washington, United States
Experience
Years required correlate with internal job level; candidates at various experience levels are welcome, with a preference for senior engineers with hands-on frontier AI experience.
Education
Bachelor’s degree or an equivalent combination of education, training, and/or experience; relevant field demonstrated through coursework, training, or professional experience.
Visa sponsorship
Visa sponsorship is available, but not for every role or candidate; if an offer is made, the company will make every reasonable effort to obtain a visa.

About the job

Train and improve production Claude models by researching, implementing, and scaling post-training techniques focused on model capabilities, alignment, and safety.

What you'll do

  • Implement and optimize post-training techniques and recipes for frontier models.
  • Build and run reliable pipelines for model fine-tuning and evaluation; develop tools to measure and improve performance.
  • Translate research into production-ready implementations, debug training and model behavior, and establish reproducible practices.

What they ask for

  • Proficiency in Python, deep learning frameworks, and distributed computing.
  • Strong software engineering skills and experience building complex ML systems.
  • Experience training, fine-tuning, or evaluating large language models.
  • Ability to analyze and debug training processes and work with large-scale distributed systems and high-performance computing.

Nice to have

  • Experience with LLMs.
  • Interest in AI safety and responsible deployment.

Pay

$350,000 — $500,000 USD annual base salary

Tools

Python, deep learning frameworks

AI focus

Post-training frontier AI models, including Constitutional AI, RLHF, and other alignment methodologies, to improve capabilities, alignment, safety, and production quality.

Model-written summary · the original posting is authoritative

First seen Oct 8, 2026 · Last verified Nov 5, 2026 (UTC)