Staff Software Security Engineer — AI Cloud Security

JobCubby; Greater London; Hybrid; GBP 255,000 - 325,000; Full time

Job summary

Anthropic is seeking a Security Engineer to join its Security Engineering team, safeguarding AI systems across multi‑cloud and on‑prem environments. You will design and implement network security controls, IAM, and secure CI/CD pipelines, while mentoring engineers and guiding security practices across projects.

The role requires hands‑on experience at scale, strong Python or systems language skills, and expertise in Kubernetes security.

Qualifications

• 8-15+ years of software engineering experience implementing and maintaining critical systems at scale.
• Strong software engineering skills in Python or at least one systems language (Go, Rust, C/C++).
• Experience implementing and operating critical systems at scale using DevOps and cloud automation practices such as infrastructure as code.
• Hands‑on network security engineering in cloud or on‑prem environments, for example VPC design, cloud firewall policy, egress control, private service connectivity or network segmentation.
• Working knowledge of Kubernetes security and networking, including network policy, service identity and container hardening.
• Experience with threat modeling and risk assessment for networked and multi cloud systems.
• Track record of driving engineering excellence through high standards, constructive code reviews and mentorship.
• Clear communicator who can translate technical concepts across organizational levels and bring clarity and ownership to ambiguous technical problems.
• Low ego, high empathy engineer who attracts talent and supports diverse, inclusive teams.
• Experience supporting fast‑paced startup engineering teams.

Responsibilities

• Build security for large‑scale AI clusters across multiple clouds and bare‑metal data centers, including IAM, network segmentation and encryption controls
• Design and implement network security controls: default‑deny ingress and egress, segmentation between research, training and production environments, private connectivity across clouds and data centers, cloud firewall policy and mTLS with service identity
• Ship these controls as secure defaults using infrastructure as code and GitOps workflows, so new clusters, VPCs and data center links inherit the right boundaries
• Build visibility into network traffic and boundary drift, with detection for exfiltration paths and automated remediation where it is safe to do so
• Design secure‑by‑design development workflows and CI/CD pipelines across our services, with expertise in Kubernetes security, container orchestration and identity management
• Threat model and assess risk for complex multi cloud and networked environments, and join infrastructure networking, cluster and data center teams at design time so topology, routing and firewall decisions carry our security requirements from day one
• Mentor engineers and contribute to hiring and growth of the Security team

Skills

8-15+ years experience

Python or systems language

DevOps & IaC experience

Network security in cloud/on‑prem

Kubernetes security & networking

Threat modeling & risk assessment

Leadership & mentorship

Clear cross‑level communication

Diversity & collaboration mindset

Startup engineering pace experience

Education

Bachelor’s degree

Tools

Kubernetes

Cloud platforms

Terraform / IaC

GitOps workflows

Job description

Anthropic is seeking a Security Engineer to join its Security Engineering team, safeguarding AI systems across multi‑cloud and on‑prem environments. You will design and implement network security controls, IAM, and secure CI/CD pipelines, while mentoring engineers and guiding security practices across projects.

The role requires hands‑on experience at scale, strong Python or systems language skills, and expertise in Kubernetes security.