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Senior Thermofluids Engineer - Heat Exchanger Design & CFD

Approach Venture LLC

El Segundo, California • Today

Full-time

USD 170,000.00 - 230,000.00 per year

Job Details

Skills

Engineering Design
Energy
Data Centers
Budget
Systems Analysis/design
Manufacturing
Interfaces
Design Review
Inspection
Instrumentation
Testing
Aerospace
Startups
3D Computer Graphics
Aerodynamics
Management
Distribution
Network
Modeling
Optimization
Adobe AIR
Heat Transfer
Mechanical Engineering
Ansys
Ansys CFX
Computational Fluid Dynamics
Control Flow Diagram
Computer Hardware
AV
Audiovisual

Summary

Senior Thermofluids Engineer - Design and simulate the heat-transfer core of a new class of power hardware

El Segundo, CA | On-site

Opportunity Summary

We are looking for a hands-on thermofluids engineer who is equally comfortable building geometry in CAD and running internal-flow CFD on it. You will be the technical owner of the heat exchangers inside a megawatt-scale power unit, from first sizing calculations through detailed design, supplier builds, and test. This role suits someone who has done this work at an early-stage hardware company or a technical engineering consultancy, where you owned the problem end to end and could not hand the CAD or the simulation off to someone else.

The team is small and moving fast. Hardware is already on the floor and testing is underway, so your designs will be cut, welded, and run on a short cycle, and the results will feed straight back into your next iteration.

About Us

We are a venture-backed energy technology company building compact, factory-built power generation equipment for fast-growing electricity demand, including data centers. Our system pairs advanced turbomachinery with high-performance heat transfer hardware to deliver more power in a smaller footprint than conventional plants. We recently moved into a larger facility in El Segundo and are scaling the engineering team around our first full-scale units.

Job Duties

Own the thermal and hydraulic design of the recuperator, primary heater, and air-cooled heat rejection hardware
Size heat exchangers using effectiveness-NTU methods, pressure-drop budgets, and channel and core geometry trades
Create and revise detailed CAD of cores, headers, manifolds, and flow passages yourself
Run 3D CFD on internal flows, including conjugate heat transfer, flow maldistribution, and header and manifold losses
Use CFD results to drive geometry changes directly, closing the loop between analysis and design
Build and maintain 1D network models to predict performance at design point, part load, and off-design conditions
Balance thermal performance against pressure drop, structural limits, packaging, cost, and manufacturability
Partner with cycle, structures, turbomachinery, and manufacturing engineers on interfaces and requirements
Lead technical work with heat exchanger vendors and fabricators from design review through inspection and acceptance
Support build, instrumentation, and testing, then correlate models against test data

Qualifications

Bachelor's degree or higher in mechanical or aerospace engineering, or a closely related field
5+ years of hands-on engineering on thermal-fluid hardware
Experience at an early-stage hardware startup or an engineering consultancy, owning technical problems end to end with limited support
Deep, hands-on 3D CFD experience on internal flows such as channels, manifolds, headers, and piping, including conjugate heat transfer (external aerodynamics experience alone is not a fit)
Strong CAD skills, with a track record of building and modifying your own detailed mechanical models
Direct experience designing and sizing heat exchangers, including effectiveness, pressure drop, and flow distribution
Proficiency with 1D or network thermal-hydraulic modeling
Have taken at least one thermal-fluid design from concept through fabrication and test
Clear communicator who can walk through technical work in depth and defend design decisions

Preferred Experience

Supercritical CO? or other high-pressure, high-temperature, or near-critical working fluids
Compact, high-effectiveness heat exchangers such as printed-circuit, microchannel, or plate-fin designs
nTop or other implicit and field-driven design or topology optimization tools
Additively manufactured heat exchangers or complex internal flow geometry
Air-cooled or dry-cooling heat rejection systems
Combustion-side heat transfer, including fired heater design
Pressure-boundary mechanical design and familiarity with ASME BPVC
Commercial CFD tools such as STAR-CCM+, Ansys Fluent, or CFX
Correlating thermal and hydraulic models against test data

Why Join Us

Own a subsystem that directly sets the efficiency, size, and cost of the entire power unit
Do the CAD, the CFD, and the hardware rather than sitting in a pure analysis seat
See your designs built and tested in weeks, not years
Work alongside the founders and a small team of experienced turbomachinery and power hardware engineers
Early, meaningful equity ownership in a company in a high-growth phase
Medical, dental, and vision coverage
Fully stocked kitchen with coffee, snacks, and meals

Compensation Details

$170,000 - $230,000 + equity

#LI-AV

Employers have access to artificial intelligence language tools (“AI”) that help generate and enhance job descriptions and AI may have been used to create this description. The position description has been reviewed for accuracy and Dice believes it to correctly reflect the job opportunity.

Dice Id: 80183540
Position Id: dc9ab7d86bd4bd3d8bb4d17c94789139
Posted 22 hours ago

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70-80/hr

Job Details

Skills

Engineering Design
Energy
Data Centers
Budget
Systems Analysis/design
Manufacturing
Interfaces
Design Review
Inspection
Instrumentation
Testing
Aerospace
Startups
3D Computer Graphics
Aerodynamics
Management
Distribution
Network
Modeling
Optimization
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Summary

Own the thermal and hydraulic design of the recuperator, primary heater, and air-cooled heat rejection hardware
Size heat exchangers using effectiveness-NTU methods, pressure-drop budgets, and channel and core geometry trades
Create and revise detailed CAD of cores, headers, manifolds, and flow passages yourself
Run 3D CFD on internal flows, including conjugate heat transfer, flow maldistribution, and header and manifold losses
Use CFD results to drive geometry changes directly, closing the loop between analysis and design
Build and maintain 1D network models to predict performance at design point, part load, and off-design conditions
Balance thermal performance against pressure drop, structural limits, packaging, cost, and manufacturability
Partner with cycle, structures, turbomachinery, and manufacturing engineers on interfaces and requirements
Lead technical work with heat exchanger vendors and fabricators from design review through inspection and acceptance
Support build, instrumentation, and testing, then correlate models against test data

Qualifications

Bachelor's degree or higher in mechanical or aerospace engineering, or a closely related field
5+ years of hands-on engineering on thermal-fluid hardware
Experience at an early-stage hardware startup or an engineering consultancy, owning technical problems end to end with limited support
Deep, hands-on 3D CFD experience on internal flows such as channels, manifolds, headers, and piping, including conjugate heat transfer (external aerodynamics experience alone is not a fit)
Strong CAD skills, with a track record of building and modifying your own detailed mechanical models
Direct experience designing and sizing heat exchangers, including effectiveness, pressure drop, and flow distribution
Proficiency with 1D or network thermal-hydraulic modeling
Have taken at least one thermal-fluid design from concept through fabrication and test
Clear communicator who can walk through technical work in depth and defend design decisions

Preferred Experience

Supercritical CO? or other high-pressure, high-temperature, or near-critical working fluids
Compact, high-effectiveness heat exchangers such as printed-circuit, microchannel, or plate-fin designs
nTop or other implicit and field-driven design or topology optimization tools
Additively manufactured heat exchangers or complex internal flow geometry
Air-cooled or dry-cooling heat rejection systems
Combustion-side heat transfer, including fired heater design
Pressure-boundary mechanical design and familiarity with ASME BPVC
Commercial CFD tools such as STAR-CCM+, Ansys Fluent, or CFX
Correlating thermal and hydraulic models against test data

Why Join Us

Own a subsystem that directly sets the efficiency, size, and cost of the entire power unit
Do the CAD, the CFD, and the hardware rather than sitting in a pure analysis seat
See your designs built and tested in weeks, not years
Work alongside the founders and a small team of experienced turbomachinery and power hardware engineers
Early, meaningful equity ownership in a company in a high-growth phase
Medical, dental, and vision coverage
Fully stocked kitchen with coffee, snacks, and meals

Compensation Details

$170,000 - $230,000 + equity

#LI-AV

Dice Id: 80183540
Position Id: dc9ab7d86bd4bd3d8bb4d17c94789139
Posted 22 hours ago

Fitment

Dice Job Match Score™

To see how well you match this job, please log in or create an account.

Once logged in, be sure to complete your profile to get the most accurate match score.

Create job alert

Never miss an opportunity! Create an alert based on the job you applied for.

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