Controls Engineer, Virtualized PLCs

Fluidstack; Austin, Northern (TX, KY); Hybrid; USD 120,000 - 180,000; Full time

Job summary

Fluidstack is seeking an experienced Industrial Controls Engineer to advance the virtualized PLC platform and software-defined infrastructure for frontier compute. You will port and validate control applications, build test harnesses, and define reference architecture for software-based controls.

Ideal candidates have PLC programming experience (IEC 61131), familiarity with virtualization, and a disciplined approach to deterministic runtime behavior, safety, and documentation of control

Qualifications

• Experience programming industrial controls and PLC platforms.
• Familiarity with IEC 61131 languages and verification of control logic.
• Experience with virtualization or software-based control runtimes.
• Ability to document control narratives for engineers and operators.

Responsibilities

• Engineer the virtualized PLC platform: software-defined infrastructure.
• Port and validate control applications onto virtual runtimes with determinism and safety.
• Build test harnesses that prove virtual controls against hardware behavior.
• Define the reference architecture: networking, redundancy, and failover for controls as software.

Skills

Industrial controls programming

PLC platforms

IEC 61131 languages

Virtualization software runtimes

Testing control logic

Documentation

Codesys

RT-Linux

Tools

Codesys

RT-Linux

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.

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.

Role Scope

• Engineer the virtualized PLC platform: control logic moving from proprietary boxes to software-defined infrastructure.

• Port and validate control applications onto virtual runtimes without giving up determinism or safety.

• Build the test harnesses that prove virtual controls against hardware behavior before a site sees them.

• Define the reference architecture: networking, redundancy, and failover for controls as software.

What We're Looking For

• You've programmed industrial controls professionally: PLC platforms and IEC 61131 languages.

• You've worked with virtualization or software-based control runtimes.

• You test control logic like lives depend on it, because they can.

• You understand determinism, scan times, and what breaks when controls become software.

• You document control narratives engineers and operators both use.

• Bonus: Codesys or software PLCs. Hypervisors and real-time Linux. BMS and EPMS applications. Functional safety.

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.