Relativity Space

Staff Fluid Systems Engineer

Long Beach, California · Staff+

Sponsorship not specified$164k-$246kDetected 18 hours ago

PythonData AnalysisThermal AnalysisAvionicsSystems EngineeringMechanical DesignHardware DesignThermodynamics

About the role

As a Vehicle Fluid Systems Engineer, you will be responsible for the fluid system architecture and function for a given vehicle fluid subsystem.
Conducting fluid and thermal analyses, including system sizing and characterization using a variety of base analytical methods (1D steady-state, fluid networks, etc.)
Relativity Space offers competitive salary and equity, a generous PTO and sick leave policy, parental leave, an annual learning and development stipend, and more!

Our Terran R vehicle will deliver customer payloads to orbit, meeting the growing demand for launch capacity.
Here, you're not just executing tasks; you're solving problems that haven't been solved before, helping develop a rocket, a factory, and a business from the ground up.
Whether you're in propulsion, manufacturing, software, avionics, or a corporate function, you'll collaborate across teams, shape decisions, and see your work come to life in record time.
You will apply expertise in system architecture, systems operations, and fluid thermodynamics applications to guide hardware design, system analysis, manufacturing, validation and operations.
Own the vehicle fluid subsystem architecture and schematics, including system control scheme, system and component selection and sizing
Leading and participating in system and hardware design and manufacturing reviews
Defining and supporting test objectives and test campaigns to validate system design, system models and overall system performance, including supporting integrated vehicle testing and launch

Bachelor's degree (Mechanical Engineering or relevant)
8+ years of experience working with fluid systems
Experience with one or more fluid or thermal modeling tools for internal compressible and incompressible analysis
Proficiency in Python or a similar programming language for scientific computing and automated test/simulation data analysis
Nice to haves, but not required:
Experience with launch vehicles and spacecraft

Relativity Space offers competitive salary and equity, a generous PTO and sick leave policy, parental leave, an annual learning and development stipend, and more!
$164,000 - $246,000 USD

Now is a unique moment in time where it's early enough to leave your mark on the product, the process, and the culture, but far enough along that Terran R is tangible and picking up momentum.
is only one part of our total rewards package.
To see some of the benefits & perks we offer, please visit here.
We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

The Stage Fluids team designs and delivers the propellant, pressurant, pneumatics, and other fluid systems that turn structures into functioning rockets.
The team has full ownership across design, production, test, and flight, maintaining a holistic view of Terran R, focused not on isolated parts but integrated functionality.
Working on-site at the factory means you're never far from the hardware, enabling rapid iteration and tight feedback loops across design and manufacturing.
You won't just be handed
At Relativity Space, we are committed to transparency and fairness in our compensation practices.
We are an equal opportunity employer and value diversity at our company.
At Relativity Space, we're building rockets to serve today's needs and tomorrow's breakthroughs.
Joining Relativity means becoming part of something where autonomy, ownership, and impact exist at every level.

If you need a reasonable accommodation, please contact us at accommodations@relativityspace.com.

This listing is sourced directly from Relativity Space's careers page and normalized into a canonical job model.