Senior Platform Security Engineer: Zero Trust & AI

Greenhouse Software, Inc.; United States; Remote; USD 135,000 - 214,000; Full time

Job summary

Radian Arc is seeking a Sr Platform Security Engineer to design and implement security across the GPU cloud platform, emphasizing zero-trust and platform security for multi-tenant workloads. You will drive IAM, network security, automation, and AI-assisted security operations to safeguard deployments.

You will collaborate with infrastructure teams to embed security into deployment practices, improve detection, and enable secure-by-design infrastructure at scale.

Qualifications

• 7+ years of experience in cloud security or infrastructure security engineering.
• Experience securing large-scale distributed infrastructure platforms.
• Strong understanding of security architecture in cloud environments.
• Experience securing Kubernetes and containerized platforms.
• Familiarity with multi-tenant infrastructure security models.
• Experience with SIEM platforms and security telemetry.
• Ability to triage vulnerabilities and investigate incidents.
• Experience building security automation workflows.

Responsibilities

• Design and implement zero-trust security architecture across the platform.
• Implement identity-aware access controls for infrastructure, services, and operators.
• Enforce least-privilege access models for both internal teams and customers.
• Secure access paths to infrastructure components including control planes, orchestration systems, management networks, and operational tooling.
• Design and operate secure authentication and authorization systems.
• Provide IAM capabilities for multi-tenant environments.
• Integrate identity systems with infrastructure and platform components.
• Secure the underlying infrastructure used by GPU cloud platforms, including storage systems and networking fabrics.
• Design and implement security controls for large-scale distributed infrastructure networks.
• Develop automation workflows that improve detection, response, and remediation.
• Build integrations between security systems and operational tooling.
• Automate vulnerability triage, remediation workflows, and incident response processes.
• Contribute to SOAR-style automation systems coordinating security operations across the platform.
• Improve detection coverage and response automation across the platform.
• Design and maintain patch management strategies across the platform infrastructure.
• Track vulnerabilities and coordinate remediation across engineering teams.
• Maintain vulnerability remediation workflows and reporting for security posture visibility.

Skills

Cloud security

Zero-trust architecture

Security automation

Incident response

Team collaboration

Tools

HashiCorp Vault

HashiCorp Boundary

Tailscale

PKI systems

IAM systems (Authentik/KeyCloak)

Kubernetes security

Job description

Radian Arc is seeking a Sr Platform Security Engineer to design and implement security across the GPU cloud platform, emphasizing zero-trust and platform security for multi-tenant workloads. You will drive IAM, network security, automation, and AI-assisted security operations to safeguard deployments.

You will collaborate with infrastructure teams to embed security into deployment practices, improve detection, and enable secure-by-design infrastructure at scale.