Mechanical engineer jobs in Round Rock, TX and nearby (276 jobs)

Mechanical engineer jobs within 25 miles of Round Rock, TX. Nearby towns and cities are included. Distances are straight-line, not driving distances.

Counted Nov 9, 2026

Hiring at a glance

View jobs

Open jobs: 276
Employers: 111

Advertised starting pay

Average starting payUSD / year: $131,700Across 34 listings

Employer-advertised starting pay, not employee salaries. Currencies and pay periods stay separate.

Where work happens

Remote: 0%0 listings
Hybrid: 4%11 listings
On-site: 22%60 listings

Not specified: 74% (205 listings)

Employers hiring include Amazon Data Services, Inc. (27), Saronic Technologies (10), UNIVERSITY OF TEXAS AT AUSTIN (10).

Sources & calculation notes

These figures describe the listings on this role page at the date shown, not the whole job market. Listings can change.

Employer-listed minimums from at least 10 listings per currency and pay period. These are advertised starting amounts, not employee salaries. Jobs without a minimum and unusual amounts are excluded.

Hybrid and on-site classifications may be inferred from descriptions. Check the original ad. How we count

Mechanical engineer jobs in Round Rock, TX and nearby

Within 25 miles

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Added 18 hours ago
G
Mechanical Engineer
GPAC
Austin, TX
- $100,000 to $140,000 USD / year
Mechanical Engineer (HVAC / Plumbing / Fire Protection) | 💰 Competitive Compensation ($100K–$140K+ DOE) | Full Benefits
Added 2 days ago
Building Mechanical Engineer
Jacobs
Austin, TX
We are looking for a driven Building Mechanical engineer to join our team for some of the most exciting infrastructure projects in the West Central region. You will join a core group of…
Added 2 days ago
G
Mechanical Engineer (Plumbing)
GPAC
Austin, TX
- $90,000 to $130,000 USD / year
I am currently working with a MEP firm local to you that is need of a Plumbing Engineer!
Added 2 days ago
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SENIOR MECHANICAL ENGINEER
GPAC
Round Rock, TX
- $120,000 to $150,000 USD / year
A regionally recognized mechanical construction and facilities services firm is seeking an experienced Senior Mechanical Project Manager to lead large-scale commercial and industrial…
Added 2 days ago
G
SENIOR MECHANICAL ENGINEER
GPAC
Austin, TX
- $120,000 to $150,000 USD / year
A regionally recognized mechanical construction and facilities services firm is seeking an experienced Senior Mechanical Project Manager to lead large-scale commercial and industrial…
Added 2 days ago
Mechanical Engineer-Tool Hookup
Samsung Austin Semiconductor, LLC.
Austin, TX
The Mechanical Engineer – Tool Hookup Scope is responsible for the design, integration, installation, and commissioning of mechanical utility connections to advanced semiconductor manufactur
Added 2 days ago
G
Senior Mechanical Engineer
GPAC
Austin, TX
- $110,000 to $150,000 USD / year
We are seeking an experienced Senior Mechanical Engineer who can perform engineering related duties for the design and planning phases of multiple and/or large, complex design and…
Added 2 days ago
G
Senior Mechanical Engineer, PE
GPAC
Austin, TX
- $135,000 to $155,000 USD / year
An established MEP consulting engineering firm in Austin is adding a Senior Mechanical Engineer to its building systems team. You'll lead HVAC and plumbing design on data center,…
Added 3 days ago
G
Mechanical Engineer (PE) - HVAC Design
GPAC
Austin, TX
- $90,000 to $150,000 USD / year
Mechanical Engineer (PE) - HVAC Design (Austin)
Added 3 days ago
Lead Mechanical Engineer (Mission Critical/Data Centers)
WSP USA
Austin, TX
…to work in collaborative and mentoring office settings. Our mechanical, electrical, plumbing, fire protection, controls, telecommunications, and security building system designs keep many…
Added 3 days ago
Entry Level Mechanical Engineer (Energy/Power)
Jacobs
Austin, TX
Jacobs' Energy and Power Solutions team is searching for driven Entry-Level Mechanical Engineers excited about starting a career focused on the energy and power market, ideal
Added 3 days ago
Data Center Mechanical Engineer, Lead Consultant
WSP
Austin, TX
Added 3 days ago
Mechanical Design Engineer
Neuralink
Austin, TX
…Neuralink. The EPC Team at Neuralink is looking for an experienced Mechanical Design Engineer to join our team. As part of the team, you will play an…
Added 4 days ago
Mechanical Engineer PE / PM – HVAC / Plumbing
Full Circle Recruiting, LLC
Austin, TX
Our client is a locally owned and highly respected engineering company in Austin that is looking to add a Mechanical Engineer PE / PM with HVAC and/or plumbing design experience to their…
Added 4 days ago
Mechanical Design Engineer (Vacuum Design, Semiconductor Industry)
blackapple
Austin, TX
Role: Mechanical Design Engineer (Vacuum Design, Semiconductor Industry)
Added 4 days ago
Mechanical Engineer I New College Grad - Bachelor's (Austin, TX)
Applied Materials, Inc
Austin, TX
Added 4 days ago
Mechanical Engineer - Actuation
Apptronik
Austin, TX
Added 4 days ago
IG
Lead Thermal Design Engineer
Insight Global
Austin, TX
- $130,000 to $160,000 USD / year
Bachelor’s degree in Mechanical Engineering, Thermal Engineering, or related technical field; Master’s degree preferred.
Added 4 days ago
SD
Senior Mechanical Engineer
SST Direct
Austin, TX
- $120,000 to $130,000 USD / year
DIRECT HIRE: The Senior Mechanical Engineer is responsible for developing and delivering mechanical engineering designs, drawings, specifications, and calculations across all phases of a…
Added 4 days ago
SD
Mechanical Engineer
SST Direct
Austin, TX
- $105,000 to $115,000 USD / year
DIRECT HIRE: The Mechanical Engineer supports the design and development of mechanical systems, drawings, specifications, and engineering calculations throughout all phases of a project,…
Added 5 days ago
Senior Mechanical Engineer- (Hybrid)
Cisco Systems, Inc.
Austin, TX
Added 6 days ago
Sr. Mechanical Design Engineer, Data Center Design Engineering
Amazon Data Services, Inc.
Austin, TX
Added 6 days ago
Sr. Mechanical Design Engineer, Data Center Design Engineering
Amazon Data Services, Inc.
Austin, TX
Added 6 days ago
Sr. Mechanical Design Engineer, Data Center Design Engineering
Amazon Data Services, Inc.
Austin, TX
Added 6 days ago
Mechanical Engineer III (Utilities & HVAC)
Dennis Group
Austin, TX
Dennis Group’s Mechanical Engineers design and implement mechanical systems as part of a broad engineering and architectural team in designing and building food and beverage production…

Fluidstack

Mechanical Engineer, Thermofluids

Austin, TX, United States
San Francsisco, CA, United States
Los Angeles, CA, United States

$210,000 to $260,000 USD / year

Apply About employer

Applications open in a new tab.

Job details

Pay: $210,000 to $260,000 USD / year
Experience: 10+ years of experience in thermofluids engineering, including thermodynamic cycle modeling, heat exchanger design, and high-pressure fluid system design.
Posting language: English
Posted: Oct 29, 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 THERMOFLUIDS R&D TEAM

Examples of key problems the team is working on

Reject 10s of GW of heat, starting now. Fluidstack is targeting 10s of GW of compute over the next two years. Every watt of it becomes heat that has to go somewhere, and no cooling team has ever been asked to open at that scale rather than grow into it.
Design and build the machines, because nobody can supply them. The merchant compressor market cannot deliver at this rate, and the vendor base behind today’s chillers will not scale to gigawatts. We are taking compressor and chiller design in house, working on machine architectures nobody sells today, and going from blank sheet to production faster than this industry thinks is possible.
Own every thermofluids problem behind the fleet, not just the chiller. Working fluid and cycle architecture, heat exchangers at a scale that dominates the cost of the plant, two-phase heat transfer at the chip, and thermal energy storage. All of it is open, and whatever this team lands gets built thousands of times.

ROLE SCOPE

Define what the machine has to be, owning the cycle model that sets the working fluid and the pressures, temperatures and flows the compressor, turbine and exchangers are designed against.
Design heat exchangers with surface areas running into millions of square meters, among the largest single drivers of a data center’s physical footprint.
Design the fluid system around the machine: piping, valves, headers, relief and isolation, sized against the pressure-drop budget the cycle can afford and the pressures the fluid actually runs at.
Run the trades that decide the machine: air-side temperature rise, face velocity and subcooling. Derive the operating points from coupled exchanger ratings rather than asserted approach temperatures, so infeasible designs get caught in the model instead of in hardware.
Take the cycle predictions onto the test stand and reconcile them against measured COP, then say plainly where the model was wrong.

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.

10+ years of experience in thermofluids engineering, including thermodynamic cycle modeling, heat exchanger design, and high-pressure fluid system design.
You’ve built a thermodynamic cycle model from fluid properties up and defended its assumptions to someone actively trying to break it.
You’ve sized real heat exchangers against published correlations, and you’ve caught a case where the correlation belonged to a different geometry than the one in front of you.
You’ve calibrated a model against a machine datasheet or test data and reported the gap honestly rather than tuning until it disappeared.
You’ve written the analysis that changed a design decision, in a form that people who never ran the code could read and act on.
You’ve sized a relief path and been the one who signed off that the system was protected.
You’ve held a result open when it was still open, instead of closing it early to be helpful.
You're comfortable with regular travel: expect 25% or more, depending on business needs.
Most of our engineering team, stakeholders, and work are based in Austin, TX, and we value working in person. We have a strong preference for Austin and run a hybrid model, but we're open to other locations for the right role and candidate.
Bonus: Vapor-compression and transcritical cycles (chillers, heat pumps, refrigeration). Propulsion and cryogenic fluid systems (feed systems, regenerative cooling, two-phase transport). Piping and relief design for high-pressure fluid systems. Real-gas properties and two-phase heat-transfer correlations (CoolProp, REFPROP, Cavallini, Gnielinski, Wang). Data center thermal architecture (CDUs, dry coolers, direct-to-chip).

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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