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 25 mins ago
F
Magnetics Engineer, Medium-Frequency Transformers
Fluidstack
Austin, TX · Phoenix, AZ
- $210,000 to $270,000 USD / year
…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…
Added 25 mins ago
F
Controls and Firmware Engineer, Power Electronics
Fluidstack
Austin, TX · Phoenix, AZ
- $210,000 to $270,000 USD / year
…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…
Added 25 mins ago
F
Power Electronics Engineer
Fluidstack
Austin, TX · Phoenix, AZ
- $210,000 to $270,000 USD / year
…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…
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
…EMT simulation (PSCAD/EMTDC, EMTP, PLECS, MATLAB/Simulink). Protection coordination and relay settings (ANSI device functions, IEC 61850). MVDC standards (IEEE 1709). Professional Engineer…
Added 25 mins ago
F
Test and Validation Engineer, High Voltage
Fluidstack
Austin, TX
- $210,000 to $270,000 USD / year
…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…
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
…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…
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
…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…
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
J
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
This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Data Engineer based in the United States.
Added 46 mins ago
J
Customer-Facing SAP Engineer – ABAP, BTP & AI
Jobgether
Remote, United States
- $100,000 to $275,000 USD / year
…next steps. Our partner is looking for a Customer-Facing SAP Engineer – ABAP, BTP & AI based in the United…
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
AT
AI Cybersecurity Engineer
Agilent Technologies
Colorado Springs, CO
- $139,440 to $217,875 USD / year
Develop security recommendations for AI data protection, model security, identity management, access controls, model governance, and third-party risk.
Added 1 hour ago
J
Systems Engineer (SQL)
Jobgether
Remote, United States
- $140,000 to $175,000 USD / year
As a Systems Engineer (SQL), you will be responsible for designing, implementing, securing, and maintaining complex database environments supporting critical government and defense IT…
Added 1 hour ago
J
DevOps Engineer
Jobgether
Remote, United States
- $115,000 to $155,000 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 DevOps Engineer based in the United States.
Added 1 hour ago
Data AI ServiceNow 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 Data AI ServiceNow Engineer based in the United States.
Added 1 hour ago
MT
NAND Custom Test Circuit Design Engineer
Micron Technology, Inc.
San Jose, CA
- $148,000 to $252,000 USD / year
…engineering solutions, and apply appropriate technical review, data protection, and engineering…
Added 1 hour ago
Senior Site Reliaiblity Engineer
Mirantis
Remote, United States
By submitting your resume, you consent to the processing and storage of your personal data in accordance with applicable data protection laws, for the purposes of considering your…
Added 1 hour ago
Software Dev Staff 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 Software Dev Staff Engineer based in the United States.
Added 1 hour ago
J
Principal Cloud Infrastructure Engineer
Jobgether
Remote, United States
- $133,000 to $213,000 USD / year
The Principal Cloud Infrastructure Engineer will serve as a technical leader responsible for designing, building, and operating mission-critical cloud platforms across a global enterprise…
Added 1 hour ago
J
Platform Engineer
Jobgether
Remote, United States
- $104,934 to $164,896 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 Platform Engineer based in the United States.
Added 1 hour ago
CCaaS Solutions Architect Genesys Cloud CX & NiCE CXone
Jobgether
Remote, United States
Design and implement integrations with CRM and ticketing platforms, including Salesforce, ServiceNow and Microsoft Dynamics 365, using REST APIs, Data Actions and webhooks.
Added 1 hour ago
MEP Engineer - 1S6J017
SNIPEBRIDGE
Remote, United States
Our client operates within the fast-moving data center and digital infrastructure sector, where engineering, construction, technology, energy, and operations come together to support…
Added 1 hour ago
MEP Engineer - 1S6J017
SNIPEBRIDGE
Remote, United States
Our client operates within the fast-moving data center and digital infrastructure sector, where engineering, construction, technology, energy, and operations come together to support…

Fluidstack

Mechanical and Thermal Engineer, Power Electronics

Austin, TX, United States
New York, NY, United States
San Francsisco, CA, United States
Seattle, WA, 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 mechanical and thermal architecture of the SST block: enclosure, busbars, cold plates, coolant loops, and a layout that fits megawatts of power electronics into a few cubic meters.
Get heat out of high-voltage parts, including transformers cooled through their insulation, while holding every creepage and clearance distance at tens of kilovolts.
Size the liquid cooling (glycol loops, heat exchangers, dielectric secondary loops) and close the thermal budget against measured losses at full power.
Design for manufacture, service, and transport: modules a technician can swap, enclosures rated for outdoor sites, and assemblies a contract manufacturer can build thousands of times.
Hand off drawings, tolerances, and test fixtures to suppliers, the test lab, and the certification body.

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 the enclosure and cooling for high-power converters (MV drives, inverters, SSTs, traction, or EV fast chargers) and shipped them.
You've laid out high-voltage busbars and conductors to meet creepage and clearance rules in a tight volume.
You've built liquid cooling for power electronics, from cold plates to heat exchangers, and matched your thermal models to test data.
You've designed parts for volume manufacture with a contract manufacturer and fixed what broke on the line.
You've designed hardware for outdoor or industrial sites: dust, humidity, vibration, and shipping loads.
Bonus: Thermal and flow simulation (CFD, Ansys Icepak, COMSOL). Mechanical CAD (SolidWorks, Creo, NX). Insulation coordination standards (IEC 60664, UL 840). Enclosure ratings (NEMA, IP). Design for manufacture and assembly (DFM, DFA).

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.

Apply on jobs.ashbyhq.com About employer

More about this job

Skills

Power electronics
CFD
Ansys
Dassault Systemes SolidWorks
PTC Creo
Siemens NX
Assembly

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Work requirements

Jobs in the United States