Anthropic
Staff + Software Security Engineer, Labs
$320K–$485K
San Francisco, CA +3 · Staff · Full-time · Posted Oct 5, 2026
- Location
- San Francisco, CA
New York City, NY
Seattle, WA
San Francisco, California, United States - Experience
- Years required correlate with internal job level; no specific number stated.
- Education
- Bachelor’s degree or an equivalent combination of education, training, and/or experience; relevant field of study demonstrated through coursework, training, or professional experience.
- Visa sponsorship
- Visa sponsorship is available; the company states it cannot sponsor every role or candidate, and will make every reasonable effort to obtain a visa after an offer.
About the job
Leads short-cycle, high-risk security projects for AI research and infrastructure, building and testing prototypes and handing successful work to production teams or documenting lessons learned.
What you'll do
- Own security projects from scoping through prototype testing, handoff, or documented exit.
- Build novel security infrastructure and test research and infrastructure workflows against it.
- Write up findings and contingency plans, and help select future projects.
What they ask for
- Deep expertise in at least one area such as firmware or hardware security, applied cryptography, OS/kernel/hypervisor internals, formal methods, reverse engineering, or high-assurance systems.
- Strong programmer with Python and at least one of Rust, Go, or C/C++; able to stand up infrastructure.
- Evidence of independently choosing and completing projects, including prototypes or experiments, and working across technical domains.
- Bachelor’s degree or an equivalent combination of education, training, and/or experience; relevant field demonstrated through coursework, training, or professional experience.
Nice to have
- Experience in airgapped or high-side environments, or offensive security, red teaming, or vulnerability research.
- Familiarity with ML infrastructure and experience in rapid-iteration environments.
Pay
$320,000 — $485,000 USD base salary
Tools
Python, Rust, Go, C/C++, zero-knowledge proofs, hypervisor
AI focus
Use Claude to drive security work, including threat modeling, rewriting critical services, and validating hardware; develop security controls and infrastructure for AI training, research, and inference.
Model-written summary · the original posting is authoritative