Security Architect, AI Infrastructure

Fluidstack; California City (CA); On-site; USD 150,000 - 190,000; Full time

Job summary

Fluidstack is building civilization-scale infrastructure for AI and seeks a security-focused engineer to own the attack surface of frontier compute, including model weights custody, training environment isolation, accelerator and interconnect security, and multi-tenant boundaries under real adversarial pressure.

You will run security design reviews for systems touching training and inference, track new accelerators and interconnect generations, and translate research into architecture that

Qualifications

• Experience securing AI compute infrastructure.
• Proven ability to translate research into engineering-ready architecture.

Responsibilities

• Own the attack surface of frontier compute: model weights custody, training environment isolation, accelerator and interconnect security, and multi-tenant boundaries under real adversarial pressure.
• Run security design reviews for systems touching training and inference environments, from bare metal to storage.
• Track new accelerators and interconnect generations and ensure architecture readiness before deployment.

Skills

Security engineering

ML/AI security

System hardening

Job description

About Fluidstack We exist to make humanity more free. Technology gave people more time for the things they wanted to do, instead of things they had to do. Powerful AI will be the biggest lever for human choice we've ever built - but only if models are aligned with what humanity actually wants. There are groups building AI who don't share these goals. Whoever deploys frontier compute infrastructure fastest will decide whether AI expands human freedom or shrinks it.

We acquire power, design and build data centers, and operate them - with teams spanning hardware and software. Come be a part of building civilization-scale infrastructure for AI.

We hire people who care deeply about this problem space. Love of the game. The frontier of AI is the most interesting problem of our time. You're securing the frontier of AI. The model weights training on our infrastructure are the most valuable and most targeted artifacts in technology, and we're standing up the compute to hold them faster than anyone ever has. The customers running on our infrastructure are building the most consequential technology in human history, and being responsible for the physical and logical security of that work makes everything else feel small.

Own the attack surface unique to frontier compute: model weights custody, training environment isolation, accelerator and interconnect security, and multi-tenant boundaries under real adversarial pressure.

Run security design review for the systems that touch training and inference environments, from bare metal and fabric to scheduler and storage.

Track where frontier compute is going (new accelerators, interconnect generations, confidential computing, agentic workloads) and have the architecture ready before it lands.

You've secured AI, ML, or HPC infrastructure where the assets were genuinely worth stealing: lab infrastructure security, supercomputing centers, or research environments that drew nation-state attention.

You can architect isolation at every layer it exists: hardware, firmware, hypervisor, kernel, container, network fabric, and physical.

You understand AI compute infrastructure as a system (accelerators, high-speed interconnects, parallel storage, schedulers) and know where each component breaks a classical security assumption.

You've done original work in systems or ML security, published or shipped, and can turn research into architecture that engineers actually build.

Bonus: Confidential computing and attestation depth. A publication record in systems or ML security.

We are committed to pay equity and transparency.

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