Security Engineer, Corp IT

Fluidstack; Austin (TX); On-site; USD 120,000 - 180,000; Full time

Job summary

Fluidstack is seeking an experienced security engineer to join the Security Team and protect our frontier compute infrastructure. You will secure the corp stack end-to-end, build detections, and drive zero-trust access across IdP, endpoints, and SaaS.

The role emphasizes hands-on incident response, IaC-based automation, and identity-centric security. You will partner with cross-functional teams to scale security as the company grows, with Okta and related technologies a strong plus.

Qualifications

• You've secured a fast-growing company's corp stack hands-on: IdP, MDM, email, SaaS.
• You've built detections that caught real attacks, and tuned out the noise that buries teams.
• You treat identity as the perimeter and have implemented that in practice.
• You automate anything you do twice, in code, not runbooks.
• You've responded to live incidents and made the containment call under pressure.
• Bonus: Okta or equivalent at depth. SIEM and SOAR engineering. macOS and Windows fleet security. Insider-risk programs.

Responsibilities

• Secure the corporate environment end to end: identity, endpoints, SaaS, and email for a workforce growing 10x.
• Build detection and response for the corp attack surface, from phishing to token theft to insider risk.
• Engineer zero-trust access: SSO, device trust, and least-privilege provisioning that scale with hiring instead of against it.
• Automate the controls so security runs as code and policy, not tickets and exceptions.

Skills

Corp stack security (IdP, MDM, email,

Detections for real attacks

Identity as perimeter

Automation in code

Incident response under pressure

Okta depth and SIEM/ SOAR familiarity

Job description

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.

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

• Secure the corporate environment end to end: identity, endpoints, SaaS, and email for a workforce growing 10x.

• Build detection and response for the corp attack surface, from phishing to token theft to insider risk.

• Engineer zero-trust access: SSO, device trust, and least-privilege provisioning that scale with hiring instead of against it.

• Automate the controls so security runs as code and policy, not tickets and exceptions.

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 secured a fast-growing company's corp stack hands-on: IdP, MDM, email, SaaS.

• You've built detections that caught real attacks, and tuned out the noise that buries teams.

• You treat identity as the perimeter and have implemented that in practice.

• You automate anything you do twice, in code, not runbooks.

• You've responded to live incidents and made the containment call under pressure.

• Bonus: Okta or equivalent at depth. SIEM and SOAR engineering. macOS and Windows fleet security. Insider-risk programs.

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 [e-mail] 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.