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Research Engineer, AI Safety & Alignment

About the role and teamJoining us as a Research Engineer, you'll be at the forefront of tackling one of the most critical challenges in AI today: safety and alignment. Your work will be pivotal in understanding and mitigating the risks of a

Company

Character.AI

Location

Redwood City, CA

Status

Open

Posted

2025-10-03T21:34:52.32+00:00

Character.AI seeks a Research Engineer for its Safety team, hybrid in Redwood City, California. The person would design evaluations and metrics for large language model safety and alignment, research alignment, value learning, and interpretability, run adversarial tests, and reduce bias or toxicity with RLHF and fine-tuning. The role also involves working with engineering and product teams and publishing research. The posting asks for a PhD or equivalent experience, GPU experience, data pipeline familiarity, and knowledge of transformers and reinforcement learning. Safety research tied to product integration is distinctive.