Research Engineer, Cybersecurity RL

Joins the Cybersecurity RL team within Anthropic's Horizons reinforcement learning group, helping its models get safely better at secure coding, vulnerability remediation and other defensive security work. The research engineer designs and builds RL environments, runs experiments and evaluations, ships work into production training runs, and collaborates with cybersecurity specialists inside and outside the company.

Anthropic wants cybersecurity research experience, machine learning experience and strong software engineering. Applied defensive work such as security engineering, fuzzing or detection and response, CTF or cyber range experience, and familiarity with RL and LLM training help. Based in San Francisco or New York.