Kubernetes SRE: Secure, Scalable Sandbox Infra

Cyrion AI; Greater London; On-site; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Equity

Health coverage

Learning budget

Hardware provided

Job summary

Cyrion AI is building a security-focused infra platform in London, seeking a Senior SRE to scale Kubernetes workloads and guarantee tenant isolation. You will own the infra that keeps agent testing safe and always-on, improving observability and efficiency.

You will join a highly concurrent system, manage on-call rotations, and drive cost and performance optimizations while shaping security practices across deployments.

Qualifications

• 4+ years in SRE/infrastructure roles operating production Kubernetes at scale.
• Strong grasp of network and workload isolation (namespaces, sandboxing).
• Experience with IaC (Terraform or similar) and CI/CD pipelines.

Responsibilities

• Operate and harden the Kubernetes infrastructure running agent workloads and sandbox replicas.
• Own on-call rotation, incident response, and postmortems for the platform.
• Improve observability (tracing, metrics, logging) across a highly concurrent system.
• Drive cost and performance optimization across compute-heavy scanning workloads.

Skills

Kubernetes at scale

SRE/Infrastructure

Observability

Network isolation

Tools

Terraform

CI/CD pipelines

Job description

Cyrion AI is building a security-focused infra platform in London, seeking a Senior SRE to scale Kubernetes workloads and guarantee tenant isolation. You will own the infra that keeps agent testing safe and always-on, improving observability and efficiency.

You will join a highly concurrent system, manage on-call rotations, and drive cost and performance optimizations while shaping security practices across deployments.