Research Engineer, Cybersecurity RL (Reinforcement Learning)
Anthropic · San Francisco, CA | New York City, NY · AI Research & Engineering · listed December 9, 2025
The shape of it
Seniority
Not stated
Where
Hybrid
Stated pay
$300,000 – $405,000 USD
Requirements listed
5
Length
987 words
In the posting’s own words
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.
What it asks for · 5
- 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.
Also a plus
- 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.
Tools and skills named
Models & research
- LLM3×
- Machine learning2×
- Evaluations
Security & compliance
- Security3×
Words the posting leans on
- experience11×
- cybersecurity8×
- research8×
- engineering7×
- defensive4×
- experience cybersecurity4×
- familiarity4×
- training4×
- engineer3×
- models3×
- response3×
- academic research2×
- applied defensive2×
- balance research2×
- beneficial systems2×
- building ctf2×
Counted from the posting after the mission statement and the legal notices are set aside. The ones near the top are the ones a screener is looking for.
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