About Fluidstack

Technology is the most important tool humans have found for improving the human condition, but it is not a default good. It is a lever for ideology.

Today the most powerful technology in history is being built: machines that solve problems better than humans can. The most important mission of our generation is to imbue AI with democratic values: error-correcting institutions, freedom of speech, individual liberties. AI trains and runs on massive compute clusters. Whichever ideology builds the infrastructure the fastest is the ideology that will endure. Democracy is delicate and won't survive this technology by default.

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

Build Fluidstack's offensive security program from the ground up, including its methodology, tooling, and engagement cadence.
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

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 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've found novel attack paths and chained vulnerabilities into full compromise.
You've run adversary simulations against well-defended environments.
You write quality code in Python, Go, or similar languages.
You write findings that get fixed and help teams prioritize risk.
You've worked closely with blue teams.
Bonus: State-nexus threat models (frontier AI, government, critical infrastructure). Testing AI and ML systems (agentic workflows, model serving). Defensive experience (detection engineering, SIEM, EDR). Hardware and data center attacks (firmware, BMC, OT/ICS). Interest in AI safety and security.

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.