Infrastructure Security Engineer

Runway builds AI systems and world models that simulate the world through the combination of art and science. Runway is hiring an Infrastructure Security Engineer to secure the Kubernetes, cloud, software supply chain, research, and serving infrastructure used to train and deploy its models. The role is hands-on, involving security tooling, infrastructure and policy code, threat modeling, identity architecture, and production security controls.

Responsibilities:

• Design and ship security controls in our Kubernetes ecosystem: admission policy, RBAC, workload identity, network policy and runtime hardening across every cluster we run
• Harden the software supply chain from dependency intake through build and deploy, including package firewalling, artifact signing and provenance, and admission controls that block what doesn't pass
• Own cloud IAM and identity architecture: least-privilege roles, short-lived credentials and workload federation
• Secure research infrastructure and training pipelines, including access to model weights and datasets, without slowing down the people using them
• Threat model new platform components before they ship and turn the findings into concrete requirements the owning team can act on
• Build guardrails for AI agents and developer tooling operating inside our infrastructure
• Write infrastructure as code and policy as code, and treat security configuration with the same review and rollout discipline as any other change
• Give the incident response team what they need when infrastructure is involved: fast answers about how a system works and what to shut off

Requirements:

• • Hands-on experience securing Kubernetes in production: you've written admission policies, debugged RBAC and workload identity problems and understand how a cluster gets compromised
• • Working knowledge of cloud IAM and networking on at least one major cloud platform, including how identity federation and short-lived credentials actually work
• • Experience with infrastructure as code and GitOps-style deployment, and the habit of shipping security changes through the same pipeline as everything else
• • Comfort writing Python, Typescript, Rust or another language to build tooling, not just scripts
• • An understanding of software supply chain attacks and the controls that stop them: signing, provenance, SBOMs, admission enforcement
• • Clear writing. Design docs, threat models and explanations to engineers who don't work in security are all part of the job
• • Judgment about which controls to enforce, which to recommend and how to roll out a breaking change without breaking the company
• • Experience securing GPU or HPC-style compute, training pipelines or research environments
• • Experience with policy engines and admission controllers (Kyverno, OPA Gatekeeper, Falco or similar)
• • Multi-tenant isolation design in a cloud environment: ABAC, scoped credentials, per-tenant boundaries
• • Experience producing security architecture evidence for SOC 2, ISO 27001 or other audits and customer assessments
• • Open source contributions or published work in cloud or Kubernetes security