Senior ML Systems Architect — Post-Training & Alignment

Character.AI; Redwood City (CA); On-site; USD 140,000 - 180,000; Full time

Job summary

Character.AI is seeking a Principal Research Engineer to lead the Post-Training team in Redwood City, California. This role involves driving technical vision and helping transform foundation models into engaging products. The ideal candidate will have a PhD in Computer Science or a related field and significant experience in machine learning and AI research.

Your responsibilities will include mentoring a team, leading initiatives in model development, and designing large-scale training systems. Join a diverse team and help shape the future of intelligent role-playing applications.

Qualifications

• PhD in Computer Science, Machine Learning, AI, or equivalent industry experience.
• Experience leading technical projects in machine learning, AI research, or distributed systems.
• Deep understanding of transformers and modern ML techniques.

Responsibilities

• Drive the technical roadmap for mid- and post-training systems.
• Lead development of alignment algorithms and optimization techniques.
• Design efficient training and inference systems for generative models.

Skills

Technical Leadership

Machine Learning

AI Research

Large-Scale Distributed Systems

Software Engineering

Communication Skills

Education

PhD in Computer Science or related field

Tools

Kubernetes

Docker

Large Language Models

Job description

Character.AI is seeking a Principal Research Engineer to lead the Post-Training team in Redwood City, California. This role involves driving technical vision and helping transform foundation models into engaging products. The ideal candidate will have a PhD in Computer Science or a related field and significant experience in machine learning and AI research.

Your responsibilities will include mentoring a team, leading initiatives in model development, and designing large-scale training systems. Join a diverse team and help shape the future of intelligent role-playing applications.