Security Architect, AI Infrastructure

About the Role

We're building civilization-scale infrastructure for AI, and the Security Team plays a critical role in protecting the most valuable and targeted artifacts in technology: model weights. As a member of this team, you'll own the attack surface unique to frontier compute, design reference architectures, and ensure the security of training and inference environments.

Responsibilities

• Own the attack surface unique to frontier compute, including model weights custody, training environment isolation, accelerator and interconnect security, and multi-tenant boundaries under real adversarial pressure.
• Design reference architectures and standards for security engineering, maintaining a clean seam between design and build to enable both sides to move fast.
• Treat the workload as part of the threat model, architecting environments that remain defensible even when the running workload is adversarial.
• Conduct security design reviews for systems touching training and inference environments, from bare metal and fabric to scheduler and storage.
• Stay ahead of frontier compute trends (new accelerators, interconnect generations, confidential computing, agentic workloads) and develop architectures before they land.

Qualifications

• Experience securing AI, ML, or HPC infrastructure with high-value assets, such as lab infrastructure, supercomputing centers, or research environments that drew nation-state attention.
• Expertise in architecting isolation across layers: hardware, firmware, hypervisor, kernel, container, network fabric, and physical.
• Understanding of AI compute infrastructure as a system, including accelerators, high-speed interconnects, parallel storage, and schedulers, with knowledge of where each component breaks classical security assumptions.
• Original work in systems or ML security, either published or shipped, with the ability to turn research into actionable architecture for engineers.
• Ability to defend design decisions based on merits and adapt when presented with compelling counterarguments.

Skills

• Bonus: Depth in confidential computing and attestation, weights custody or cryptographic key custody at scale, and a publication record in systems or ML security.

Pay

Compensation Range: $275K - $344K

Fluidstack is an Equal Employment Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability, protected veterans’ status, or any other characteristic protected by law.