Research Engineer, Cybersecurity Reinforcement Learning

Anthropic
San Francisco, CA, USA2025-12-09

About the job

We're hiring for the Cybersecurity RL team within Horizons. As a Research Engineer, you'll help to safely advance the capabilities of our models in secure coding, vulnerability remediation, and other areas of defensive cybersecurity. This role blends research and engineering, requiring you to both develop novel approaches and realize them in code.

Responsibilities

Designing and implementing RL environments; conducting experiments and evaluations; delivering your work into production training runs; collaborating with other researchers, engineers, and cybersecurity specialists across and outside Anthropic.

Qualifications

Minimum

Have experience in cybersecurity research.

Have experience with machine learning.

Have strong software engineering skills.

Can balance research exploration with engineering implementation.

Are passionate about AI's potential and committed to developing safe and beneficial systems.

Preferred

Professional experience in security engineering, fuzzing, detection and response, or other applied defensive work.

Experience participating in or building CTF competitions and cyber ranges.

Academic research experience in cybersecurity.

Familiarity with RL techniques and environments.

Familiarity with LLM training methodologies.