Security Engineer, Infrastructure

About Fluidstack

We exist to make humanity more free. For most of human history, you farmed or you starved. 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're singularly focused on delivering 10 to 100s of GWs of compute faster than anyone else, rethinking every layer of the stack. We acquire power, design and build data centers, and operate them - with teams spanning hardware and software. Speed and scale are our key differentiators. Come be a part of building civilization-scale infrastructure for AI.

## We hire people who care deeply about this problem space. If that is you, please apply!

How We Operate

• Be a barrel. Full autonomy. Own things end to end, take on scope without being asked, no permission required to operate outside your core role.
• Insane urgency. We drive everything forward as fast as possible.
• Reason from first principles. Challenge every assumption. Zero analogy thinking, no egos, the best idea wins.
• Love of the game. The frontier of AI is the most interesting problem of our time. We put in long hours at high intensity to push the frontier forward.
• Build something that actually matters. If you're going to spend your time, spend it on something that matters to the world.

The Security Team

Examples of key problems the team is working on

• 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. A breach isn't a leak, it's the frontier walking out the door.
• Build the entire security program from scratch. Most leaders inherit someone else's system and spend a career patching it. Here you own it end to end, bare metal to boardroom, as we scale across continents.
• Your threat surface is measured in gigawatts. 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.

Role Scope

• Be the hands-on technical owner of the systems and pipelines that make the security program run: SIEM and data-warehouse architecture, data ingestion and enrichment, and security tool engineering across IT, OT, cloud, and bare metal.
• Design, deploy, and operate security tooling and data infrastructure: log-source onboarding, detection engineering, alert tuning, and pipeline management across IT and OT.
• Architect and maintain the security data platform: ingestion, normalization, enrichment, and routing of telemetry from endpoints, network, cloud, OT/ICS, and physical security tooling.
• Build and manage integrations across EDR, vulnerability management, SOAR, CASB, and identity platforms.
• Embed security into the software development lifecycle: CI/CD pipeline security, secrets management, artifact integrity, and review of security-relevant changes.
• Build tooling for automated security-data collection and quality validation, and partner with network, infrastructure, and IT teams to keep instrumentation complete across multi-site facilities.

What We're Looking For

The below is a starting point. We always make space for exceptional people, so if you don't fit this role exactly, tell us where you would.

• You've designed, implemented, and maintained security infrastructure and tooling, and you want to build a modern stack from the ground up rather than maintain what exists.
• You know security system architecture and work fluently with cloud and virtualization technologies.
• You build and operate security data pipelines (ingestion, normalization, enrichment, routing) across diverse source types.
• You integrate security tools (EDR, vuln management, SOAR, identity) and embed security into CI/CD.
• You collaborate across technical teams to make instrumentation complete and accurate everywhere.
• Bonus: SIEM and security data-lake architecture. Detection engineering. OT/ICS security. Infrastructure-as-code and pipeline automation.

Salary & Benefits

• Competitive total compensation package (salary + equity).
• Retirement or pension plan, in line with local norms.
• Health, dental, and vision insurance.
• Generous PTO policy, in line with local norms.

We are committed to pay equity and transparency.

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 and protected veterans’ status, or any other characteristic protected by law. Fluidstack will consider for employment qualified applicants with arrest and conviction records pursuant to applicable law.

You will receive a confirmation email once your application has successfully been accepted. If there is an error with your submission and you did not receive a confirmation email, please email careers@fluidstack.io with your resume/CV, the role you've applied for, and the date you submitted your application-- someone from our recruiting team will be in touch.