Jobs in the United States

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Added 15 mins ago
Member of Technical Staff, Security
Sieve
San Francisco, CA
All roles at Sieve require you to be onsite in San Francisco 5 days per week.
Added 19 mins ago
O
Firmware Engineer, Robotics
OpenAI
San Francisco, CA
- $380,000 to $445,000 USD / year
…focused on robots to support skilled workers to build our future infrastructure. In the long term, we imagine everyone having a personal robot doing anything they need. Progress is rapid,…
Added 24 mins ago
R
Staff Software Engineer, Revenue & Billing
Rillet
San Francisco, CA
- $240,000 to $300,000 USD / year
…investors. We’re using that backing to build the financial infrastructure for the next generation of companies and help every business run its numbers at the speed of…
Added 25 mins ago
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Magnetics Engineer, Medium-Frequency Transformers
Fluidstack
Austin, TX · Phoenix, AZ
- $210,000 to $270,000 USD / year
…who don't share these goals. Whoever deploys frontier compute infrastructure fastest will decide whether AI expands human freedom or shrinks…
Added 25 mins ago
F
Controls and Firmware Engineer, Power Electronics
Fluidstack
Austin, TX · Phoenix, AZ
- $210,000 to $270,000 USD / year
…who don't share these goals. Whoever deploys frontier compute infrastructure fastest will decide whether AI expands human freedom or shrinks…
Added 25 mins ago
F
Power Electronics Engineer
Fluidstack
Austin, TX · Phoenix, AZ
- $210,000 to $270,000 USD / year
…who don't share these goals. Whoever deploys frontier compute infrastructure fastest will decide whether AI expands human freedom or shrinks…
Added 25 mins ago
F
DC Power Systems and Protection Engineer
Fluidstack
Austin, TX · New York, NY · San Francsisco, CA · Seattle, WA
- $210,000 to $270,000 USD / year
…who don't share these goals. Whoever deploys frontier compute infrastructure fastest will decide whether AI expands human freedom or shrinks…
Added 25 mins ago
F
Test and Validation Engineer, High Voltage
Fluidstack
Austin, TX
- $210,000 to $270,000 USD / year
…who don't share these goals. Whoever deploys frontier compute infrastructure fastest will decide whether AI expands human freedom or shrinks…
Added 25 mins ago
F
PCB Design Engineer, Power Stage Hardware
Fluidstack
Austin, TX · New York, NY · San Francsisco, CA · Seattle, WA
- $210,000 to $270,000 USD / year
…who don't share these goals. Whoever deploys frontier compute infrastructure fastest will decide whether AI expands human freedom or shrinks…
Added 25 mins ago
F
Mechanical and Thermal Engineer, Power Electronics
Fluidstack
Austin, TX · New York, NY · San Francsisco, CA · Seattle, WA
- $210,000 to $270,000 USD / year
…who don't share these goals. Whoever deploys frontier compute infrastructure fastest will decide whether AI expands human freedom or shrinks…
Added 34 mins ago
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Senior Core Infrastructure Engineer
Oracle
Nashville, TN
- $79,200 to $209,500 USD / year
–Collaborates with the team to ensure cloud infrastructure complies with relevant industry standards and regulations and that documentation is up-to-date
Added 35 mins ago
Associate Software Engineer, Fleet Support & Automation
Intramotev
St. Louis, MO
…- and most of those issues should not pull a core software engineer off their work. We are seeking an Associate Software Engineer, Fleet Support & Automation to be the first software…
Added 35 mins ago
Electrical/Power Systems Engineer
Duke Energy Carolinas, LLC
York, SC
However, hybrid employees must live within a reasonable commute to their designated Duke Energy facility, not greater than 50 miles one way · Please note that in order to be considered for this position, you must possess all of the basic/required qualifications
Added 35 mins ago
Electrical/ I&C / Digital Process Systems Engineer
Duke Energy Carolinas, LLC
York, SC
However, hybrid employees must live within a reasonable commute to their designated Duke Energy facility, not greater than 50 miles one way · Hybrid work arrangement: after onboarding, employees must work onsite at Catawba Nuclear Station at least two days per week, with two remote days
Added 36 mins ago
Software Engineer II- Full-stack Developer
Deloitte
Saint Louis, MO
Software Engineer II, AI & Engineering/Engineering as a Service AI & Engineering leverages cutting-edge engineering capabilities to build, deploy, and operate integrated/verticalized sector…
Added 36 mins ago
Software Engineer II- Full-stack Developer
Deloitte
Kansas City, MO
Software Engineer II, AI & Engineering/Engineering as a Service AI & Engineering leverages cutting-edge engineering capabilities to build, deploy, and operate integrated/verticalized sector…
Added 38 mins ago
Engineer I - IV
State of Delaware
Dover, DE
Applicants must have education, training and/or experience demonstrating competence in each of the following areas:
Added 43 mins ago
Senior Data Engineer, Operational Excellence - EDA Infrastructure
NVIDIA USA
Remote, United States
AI Infrastructure Engineers at NVIDIA build the systems, tooling, and data infrastructure that enable operation of our AI cloud services. We are enabling engineering teams to innovate while…
Added 46 mins ago
Staff Site Reliability Engineer
Jobgether
Remote, United States
This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Staff Site Reliability Engineer based in the United States.
Added 46 mins ago
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Senior Network Engineer
Jobgether
Remote, United States
- $97,500 to $162,500 USD / year
This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Network Engineer based in the United States.
Added 46 mins ago
Senior Data Engineer
Jobgether
Remote, United States
The Senior Data Engineer will design, build, and operate the core data infrastructure powering advanced blockchain intelligence and analytics products.
Added 47 mins ago
CP
Advanced Solutions 5G RF Engineer
Cellco Partnership
Basking Ridge, NJ · Irving, TX · Cary, NC · Temple Terrace, FL
- $74,000 to $142,000 USD / year
As the Senior 5G RF Engineer for the WCC Advanced Solutions Team, you will serve as the primary RF engineering resource responsible for designing private LTE/5G and in-building systems…
Added 1 hour ago
Field Engineer - Network Deployment
The GOR Group
Abilene · Abilene, TX
The GOR Group is partnering with a leading technology solutions provider to identify an experienced Field Engineer - Network Deployment to support complex network infrastructure…
Added 1 hour ago
Industrial Engineer
Saber Power Services
Baton Rouge, LA
…commissioning, and maintenance of medium- and high-voltage electrical infrastructure. Saber serves customers locally, nationally, and…
Added 1 hour ago
IT Systems Administrator
WD-40 COMPANY
San Diego, CA
You’ll join a lean global infrastructure team spanning the Americas and EIMEA, where everyone gets broad exposure. Day to day, you’ll work alongside our Americas senior engineers -…

Fluidstack

Magnetics Engineer, Medium-Frequency Transformers

Austin, TX, United States
Phoenix, AZ, United States

$210,000 to $270,000 USD / year

Apply on jobs.ashbyhq.com About employer

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Job details

Pay: $210,000 to $270,000 USD / year
Posting language: English
Posted: Nov 11, 2026

Original 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.

THE PRODUCT ENGINEERING TEAM

Product Engineering builds the power and cooling systems that let Fluidstack deliver gigawatt-scale AI data centers faster and denser than the grid-standard supply chain allows. The SST group is designing solid-state transformers as a core building block of that power architecture.

Examples of key problems the team is working on

Architect a medium-voltage solid-state transformer that can be manufactured, serviced, and scaled across gigawatt-scale campuses, not just demonstrated in a lab.
Define the interface between the SST and the MVDC distribution system, including protection, control boundaries, and fault behavior.
Build a semiconductor and magnetics supply strategy that survives a thin 10kV SiC market over a multi-year horizon.
Take converter hardware from topology selection through working prototypes on a schedule that data center construction actually depends on.

ROLE SCOPE

Design the medium-frequency transformer at the heart of every SST cell: hundreds of kilowatts at tens of kilohertz, insulated for tens of kilovolts DC to ground.
Choose core materials, winding structures, insulation, and liquid cooling that balance loss, size, and cost across thousands of units.
Prove each design on the bench with hi-pot, partial-discharge, impulse, and thermal-cycling tests, and set the acceptance tests every production unit must pass.
Review vendor transformer designs during co-development and sign off on their insulation margins before we commit to volume.
Turn the design into a part a supplier can wind, pot, and test at volume, and qualify a second source.

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. https://jobs.ashbyhq.com/fluidstack/05c2e69c-42f9-4fcb-9cf0-a467aaf98f1c

You've designed and built high-frequency transformers or inductors for power converters at tens to hundreds of kilowatts.
You've designed insulation for medium-voltage magnetics and run hi-pot, partial-discharge, and basic impulse tests yourself.
You've used FEA to predict losses, leakage inductance, and hot spots, then matched those predictions to measured data.
You've pulled heat out of a winding through its insulation system, by cold plate or liquid, without creating partial discharge.
You've taken a magnetic component from prototype to volume production with an outside supplier.
You've traced a test or field failure to its root cause in the insulation, core, or winding.
Bonus: Core materials (nanocrystalline, ferrite). Solid and cast insulation (epoxy, silicone potting). Magnetics FEA (ANSYS Maxwell, COMSOL). Integrated leakage design for resonant converters (LLC, DAB). Transformer and insulation standards (IEC 61558, UL 1446).

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.

Applicant Privacy Notice https://fluidstack.io/legal/applicant-privacy-notice AI Screening Notice https://fluidstack.io/legal/ai-screening-notice Ashby Bias Audit https://fluidstack.io/legal/ashby-bias-audit

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.

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Jobs in the United States