Research Engineer, Production Model Post Training

Anthropic • San Francisco, CA

266d • $315,000 - $510,000

About The Position

Anthropic's production models undergo sophisticated post-training processes to enhance their capabilities, alignment, and safety. As a Research Engineer on our Post-Training team, you'll develop and optimize the systems that transform our base models into the refined Claude models that users interact with. You'll work at the intersection of cutting-edge research and production engineering, implementing, scaling, and improving post-training techniques like Constitutional AI, RLHF, and other alignment methodologies. Your work will directly impact the quality, safety, and capabilities of our production models.

Requirements

• Strong software engineering skills with experience building complex ML systems
• Comfortable working with large-scale distributed systems and high-performance computing
• Experience with training, fine-tuning, or evaluating large language models
• Ability to balance research exploration with engineering rigor and operational reliability
• Adept at analyzing and debugging model training processes
• Enjoy collaborating across research and engineering disciplines
• Ability to navigate ambiguity and make progress in fast-moving research environments
• Keen interest in AI safety and responsible deployment
• Proficiency in Python, deep learning frameworks, and distributed computing

Nice To Haves

• Experience with LLMs is a significant plus
• Hands-on experience with frontier AI systems

Responsibilities

• Implement and optimize post-training techniques at scale on frontier models
• Design, build, and run robust, efficient pipelines for model fine-tuning and evaluation
• Develop tools to measure and improve model performance across various dimensions
• Collaborate with research teams to translate emerging techniques into production-ready implementations
• Debug complex issues in training pipelines and model behavior
• Help establish best practices for reliable, reproducible model post-training

Benefits

• Competitive compensation
• Generous vacation and parental leave
• Flexible working hours
• Optional equity donation matching
• Lovely office space for collaboration

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Industry: Publishing Industries
• Education Level: Bachelor's degree