Relativity Space
Overview
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. Joining Relativity means becoming part of something where autonomy, ownership, and impact exist at every level. You’ll collaborate across teams, shape decisions, and see your work come to life in record time. 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’ll be expected to ask the right questions, collaborate with partners across the company, and ultimately find the best solutions for Terran R. About the Role
To be successful in this role, you should thrive in ambiguity and be able to lead your own projects to completion. A high degree of drive and autonomy is required. You must be flexible to changes in strategic direction and willing to push your understanding and intuition to ensure we are producing the best possible product. You will be directly responsible for mission-critical systems and processes as a technical authority for one or multiple fluid systems and/or processes on the launch vehicle. You will have a significant influence on a fast-growing startup and oversee rapid progress in an environment that encourages growth and risk. You will be responsible for the design and analysis of the fluid systems that ensure reliable and efficient operation of Terran R vehicles. Specific responsibilities will include: Conducting trade studies to produce architectures and designs that satisfy system requirements Sizing at the system and component level Conducting fluid and thermal analyses, including system performance prediction and characterization using a variety of analytical methods (1D steady-state, transient, fluid networks, etc.) Creating tools to enhance our team’s analysis capabilities and streamline workflow Participating in design and manufacturing reviews Owning and leading test campaigns to validate system design and performance Anchoring models with data from test and launch About You
Bachelor’s degree (Mechanical Engineering or relevant) 5+ 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 Experience with programming languages such as Matlab, Python, or C++ Nice to have
Experience with launch vehicles and spacecraft Compensation & Benefits
Relativity Space is committed to transparency and fairness in compensation. Actual compensation will be determined based on experience, qualifications, and other job-related factors. Compensation is part of our total rewards package, which includes competitive salary and equity, a generous PTO and sick leave policy, parental leave, an annual learning and development stipend, and more. For details on benefits, please visit our careers page. Hiring Range: $142,000 — $181,500 USD Equal Opportunity
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. If you need a reasonable accommodation, please contact us at accommodations@relativityspace.com.
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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. Joining Relativity means becoming part of something where autonomy, ownership, and impact exist at every level. You’ll collaborate across teams, shape decisions, and see your work come to life in record time. 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’ll be expected to ask the right questions, collaborate with partners across the company, and ultimately find the best solutions for Terran R. About the Role
To be successful in this role, you should thrive in ambiguity and be able to lead your own projects to completion. A high degree of drive and autonomy is required. You must be flexible to changes in strategic direction and willing to push your understanding and intuition to ensure we are producing the best possible product. You will be directly responsible for mission-critical systems and processes as a technical authority for one or multiple fluid systems and/or processes on the launch vehicle. You will have a significant influence on a fast-growing startup and oversee rapid progress in an environment that encourages growth and risk. You will be responsible for the design and analysis of the fluid systems that ensure reliable and efficient operation of Terran R vehicles. Specific responsibilities will include: Conducting trade studies to produce architectures and designs that satisfy system requirements Sizing at the system and component level Conducting fluid and thermal analyses, including system performance prediction and characterization using a variety of analytical methods (1D steady-state, transient, fluid networks, etc.) Creating tools to enhance our team’s analysis capabilities and streamline workflow Participating in design and manufacturing reviews Owning and leading test campaigns to validate system design and performance Anchoring models with data from test and launch About You
Bachelor’s degree (Mechanical Engineering or relevant) 5+ 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 Experience with programming languages such as Matlab, Python, or C++ Nice to have
Experience with launch vehicles and spacecraft Compensation & Benefits
Relativity Space is committed to transparency and fairness in compensation. Actual compensation will be determined based on experience, qualifications, and other job-related factors. Compensation is part of our total rewards package, which includes competitive salary and equity, a generous PTO and sick leave policy, parental leave, an annual learning and development stipend, and more. For details on benefits, please visit our careers page. Hiring Range: $142,000 — $181,500 USD Equal Opportunity
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. If you need a reasonable accommodation, please contact us at accommodations@relativityspace.com.
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