Security Engineer, Offensive Security

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 weve ever built - but only if models are aligned with what humanity actually wants. There are groups building AI who dont 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. Youre securing the frontier of AI.

The model weights training on our infrastructure are the most valuable and most targeted artifacts in technology, and were 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.
Run red and purple team operations emulating advanced threat actors across our cloud infrastructure, endpoints and bare metal deployments.
Pen test critical systems, including tenant isolation, bare metal GPU hosts, firmware and BMCs, and data center OT.
Partner with security and engineering teams on AI-specific attack scenarios, including agentic systems and other novel AI-enabled risks.
Contribute to AI-assisted offensive testing tools and workflows.
Present findings to technical and executive audiences as clear, actionable risk that shapes the security roadmap.
Live on the bleeding edge of AI-enabled offensive operations inside and outside our environments
You have years of hands-on experience in red teaming and offensive security operations.
You have deep expertise in at least two of: macOS, Linux, cloud (AWS, GCP, Azure), Kubernetes, CI/CD pipelines.
You write quality code in Python, Go, or similar languages.
You write findings that get fixed and help teams prioritize risk.
Bonus:

State-nexus threat models (frontier AI, government, critical infrastructure). Testing AI and ML systems (agentic workflows, model serving). Hardware and data center attacks (firmware, BMC, OT/ICS). Interest in AI safety and 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. You will receive a confirmation email once your application has successfully been accepted. io with your resume/CV, the role youve applied for, and the date you submitted your application-- someone from our recruiting team will be in touch.