Aerospace & DefenseDirect Greenhouse career site

Senior Fluid Systems Engineer

Pay: $132,000 – $198,000 per year
Location: Long Beach, CA · On-site
Job type: Full-time
Level: Senior
Experience: 4+ years
Education: Bachelor's degree
Listed: 30 days ago

Skills & highlights for this role

fluid system architecture
thermodynamics
fluid dynamics
Python

Also useful

launch vehicle experience
spacecraft experience

Stated benefits & perks

Pto
Parental leave
Learning stipend

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. 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
Conducting fluid and thermal analyses, including system sizing and characterization using a variety of base analytical methods (1D steady-state, fluid networks, etc.)
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

About You

Bachelor's degree (Mechanical Engineering or relevant)
4+ years of experience working with fluids systems
Experience applying engineering fundamentals in system design, thermodynamics, fluid dynamics, and heat transfer
Experience with one or more fluid or thermal modeling tools for internal compressible and incompressible analysis
Proficiency in Python or a similar programing language for scientific computing and automated test/simulation data analysis

Nice to haves, but not required

Experience with launch vehicles and spacecraft

Additional information

At Relativity Space, we are committed to transparency and fairness in our compensation practices. Actual compensation will be determined based on experience, qualifications, and other job-related factors.

Pay and benefits

Compensation is only one part of our total rewards package. Relativity Space offers competitive salary and equity, a generous PTO and sick leave policy, parental leave, an annual learning and development stipend, and more! To see some of the benefits & perks we offer, please visit here.

Hiring Range: $132,000—$198,000 USD

Please note: Relativity Space does not accept unsolicited resumes, candidate profiles, or referrals from recruitment agencies or search firms. Any unsolicited submission - via email, our website, social media, or directly to an employee - will be deemed the property of Relativity Space, and no fee will be owed absent a current, fully executed agreement with Talent Acquisition that specifically authorizes submissions for the applicable role.

About Relativity Space

At Relativity Space, we're building rockets to serve today's needs and tomorrow's breakthroughs. Our Terran R vehicle will deliver customer payloads to orbit, meeting the growing demand for launch capacity. But that's just the start. Achieving commercial success with Terran R will unlock new opportunities to advance science, exploration, and innovation, pioneering progress that reaches beyond the known.

Joining Relativity means becoming part of something where autonomy, ownership, and impact exist at every level. 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. Relativity is a place where creativity and technical rigor go hand in hand, and your voice will help define the stories we're writing together.

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. The most meaningful work of your career is waiting. Join us.

About the Team

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 requirements: you'll be expected to ask the right questions, collaborate with partners across the company, and ultimately find the best solutions for Terran R.

Equal opportunity and legal notices

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

Read the original posting

From Relativity Space's careers page, first listed on Rolev.ai on October 10, 2026. Rolev.ai is not the employer.

How Rolev.ai helps with this application

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Common questions

What is the salary for the Senior Fluid Systems Engineer role at Relativity Space?

The Senior Fluid Systems Engineer posting at Relativity Space states compensation of $132,000 – $198,000 per year. It is listed as a full-time position. Final pay may depend on location, experience, and interview evaluation on Relativity Space's official career site.

Where is the Senior Fluid Systems Engineer job at Relativity Space located?

This Senior Fluid Systems Engineer position at Relativity Space is located in Long Beach, CA (On-site). Always check Relativity Space's application page for specific state eligibility or relocation policies.

What qualifications are required for Senior Fluid Systems Engineer at Relativity Space?

For the Senior Fluid Systems Engineer role, Relativity Space highlights 4+ years of relevant experience; a bachelor's degree; experience with fluid system architecture, thermodynamics, fluid dynamics, Python. Rolev.ai can score your existing resume against these requirements and show any skill gaps before you apply.

How do I apply for the Senior Fluid Systems Engineer position at Relativity Space?

This listing links directly to Relativity Space's Greenhouse application page. You can apply directly on Relativity Space's site, or use Rolev.ai to check your resume fit, generate a zero-hallucination tailored resume and cover letter for this posting, and autofill the Greenhouse application form in 1 click with the Rolev.ai Chrome extension. You always review the form and press Submit yourself.

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