Security Engineer, Offensive Security

Anthropic, the AI research lab behind Claude, is seeking an Offensive Security Engineer to join their mission of creating reliable and steerable AI systems. The Security Engineering team's mission is to safeguard AI systems and maintain user trust. In this role, you will go beyond standard pentesting to conduct red and purple team engagements simulating advanced threat actors across cloud infrastructure, endpoints, and bare metal deployments.

Key Responsibilities

• Red Teaming: Conduct red and purple team engagements simulating advanced threat actors across cloud (AWS/GCP), endpoints, and bare metal systems.
• AI Security: Work cross-functionally to define and execute AI-specific attack scenarios and contribute to AI-assisted security testing tooling.
• Penetration Testing: Perform targeted penetration testing on high-value deployments.
• Risk Communication: Translate complex attack narratives into actionable risk insights for both technical and executive audiences to inform security roadmaps.
• Collaboration: Work in close collaboration with the blue team (defenders) to improve detection and response.

Requirements

• Experience: 5+ years of hands-on experience in red teaming and offensive security operations.
• Technical Depth: Deep expertise in at least two of the following: macOS security, Linux Security, Cloud security (GCP/AWS/Azure), Kubernetes, or CI/CD pipelines.
• Engineering Skills: Strong coding skills in Python, Go, or similar languages for tool development.
• Adversarial Mindset: A track record of discovering novel attack vectors and chaining vulnerabilities creatively against well-defended environments.
• Reporting: Ability to write clear findings that drive action and prioritize fixes.

Preferred Qualifications

• Experience with state actor threat models (APT simulations).
• Background in testing AI/ML systems or agentic workflows.
• Experience with data center security or hardware-based attacks.

Logistics & Benefits

• Hybrid Policy: Staff are expected to be in one of the offices (SF or Seattle) at least 25% of the time, though the role is listed as "Remote-Friendly" with travel.
• Visa Sponsorship: Anthropic sponsors visas and retains immigration lawyers to assist offers.
• Compensation: Annual Salary range of $300,000 - $320,000 USD.
• Perks: Competitive benefits, equity donation matching, generous vacation, and flexible hours.