RadixArk builds large-scale inference and training systems for the entire AI community, making frontier-level AI infrastructure open and accessible. Backed by Accel.
About the role
RadixArk is looking for a Member of Technical Staff — Security to champion both our internal security posture and help us prepare for vendor audits and compliance requirements. As our first dedicated security engineer, you'll lay the foundation for security practices across our infrastructure, products, and operations—ensuring we can confidently serve enterprise customers and pass SOC 2 audits.
What they're looking for
- 4+ years working on security, infrastructure, or backend systems (or equivalent combination of hands-on experience and security training)
- Strong understanding of cloud platforms: AWS, GCP, or Azure (IAM, networking, data protection, secrets management)
- Proficiency in Linux/Unix system administration and command-line tools
- Hands-on experience with Kubernetes, container security, or infrastructure-as-code
- Solid understanding of network security, authentication/authorization protocols, and cryptography basics
- Experience conducting vulnerability assessments, penetration testing, or security audits
More about this role
RadixArk is looking for a Member of Technical Staff — Security to champion both our internal security posture and help us prepare for vendor audits and compliance requirements. As our first dedicated security engineer, you'll lay the foundation for security practices across our infrastructure, products, and operations—ensuring we can confidently serve enterprise customers and pass SOC 2 audits.
This is a unique opportunity to shape security from the ground up at a fast-growing AI infrastructure company. You'll work across backend systems, cloud infrastructure, and customer-facing APIs to build security into our products and processes before external auditors arrive.
- Build and document our internal security architecture, controls, and practices
- Create threat models for our systems and products that interact with customer data
- Develop an Incident Response Plan (IRP) and Business Continuity/Disaster Recovery (BC/DR) plan
- Establish vulnerability and patch management processes with clear SLAs
- Prepare security documentation for vendor audits, including SOC 2 readiness
- Define which systems and data handle customer data to determine SOC 2 audit scope
- Create and maintain an...
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