Software Engineer, Safeguards Infrastructure

• Build the foundational systems that power Anthropic's Safeguards infrastructure — including data storage and management, metric and evaluation systems, and tooling for human and agentic review. • Develop robust, multi-layered defences for real-time improvement of safety mechanisms that work at scale, detecting unwanted model behaviours and preventing disallowed use. • Ensure the day-to-day running of Safeguards systems to a high operational bar that serves both safety and customers while reducing human intervention required. • Work across the stack using Python to build systems that monitor models, prevent misuse, and ensure user well-being. • Be based at least 25% of the time in Anthropic's London office.

• Hold a bachelor's degree in Computer Science, Software Engineering, or have comparable experience. • Have 4–10+ years of experience in a software engineering position. • Have proficiency in Python. • Have the ability to work across the stack. • Have strong communication skills and the ability to explain complex technical concepts to non-technical stakeholders.

• Have experience building trust and safety, anti-spam, fraud, or abuse detection and mitigation mechanisms for AI/ML systems. • Have experience building metrics and measurement systems or data and privacy management systems. • Have worked closely with operational teams to build custom internal tooling. • Be proficient in TypeScript or Rust. • Have experience with Claude Code or similar agentic coding tools.

• Develop foundational infrastructure for Safeguards including data storage, metrics, evaluation systems, and review tooling. • Build real-time, multi-layered safety defences that operate at scale. • Ensure reliable day-to-day operation of Safeguards systems. • Build systems to detect unwanted model behaviours and prevent disallowed model use. • Reduce the amount of human intervention and oversight required through automation and robust system design.

• Earn £255,000–£325,000 per year. • Receive visa sponsorship — Anthropic retains an immigration lawyer and makes every reasonable effort to support visa applications. • Access optional equity donation matching, generous vacation and parental leave, and flexible working hours. • Work on foundational safety infrastructure at one of the world's most important AI safety organisations, directly upholding principles of safety, transparency, and oversight.

Anthropic is a public benefit corporation headquartered in San Francisco, with a mission to create reliable, interpretable, and steerable AI systems. The Safeguards team builds the foundational safety, oversight, and intervention mechanisms for Anthropic's AI systems — monitoring models, preventing misuse, and ensuring user well-being at scale.