Radixark Member of Technical Staff — Security at RadixArk responsible for establishing and maintaining internal security posture and preparing for vendor audits and compliance. Leads SOC 2 audit readiness and security architecture development.
Responsibilities
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.
Security Posture & Compliance:
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
System Scoping & Inventory:
Define which systems and data handle customer data to determine SOC 2 audit scope
Create and maintain an inventory of infrastructure, applications, and third-party dependencies
Classify data flows and identify security boundaries between in-house and outsourced components
Qualification
4+ years working on securityExperience with ML infrastructureExperience writing security policiesFamiliarity with supply-chain securityEducation & BackgroundBachelor's degree in Computer ScienceRelevant security certifications (CISSP
Required
4+ years working on security, infrastructure
Preferred
Background in founding or early-stage startups—you understand scrappy, pragmatic security (not over-engineering on day one)
Experience with ML infrastructure, GPU/compute management, or high-performance systems
Involvement in SOC 2 audits or other compliance programs
Experience writing security policies, playbooks, and operational runbooks
Familiarity with supply-chain security, open-source risk, or dependency management
Education & Background:
Bachelor's degree in Computer Science, Engineering, Cybersecurity, or equivalent professional experience
Relevant security certifications (CISSP, CISM, CEH, OSCP, etc.) are a plus but not required
