Engine Systems & Test Team- Staff Engine Systems Development Engineer

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. 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 a company where autonomy, ownership, and impact are valued at every level. Here, you're not just executing tasks; you're solving unprecedented problems, 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 quickly. Relativity fosters a culture of creativity and technical rigor, where your voice helps define our collective story. This is a unique moment to leave your mark on our product, process, and culture, with Terran R becoming tangible and momentum building. The most meaningful work of your career awaits. Join us. About the Team: The Propulsion team at Relativity develops high-performance, manufacturable engines for Terran R. Engineers oversee the entire lifecycle of their parts, from design through production to qualification and flight. The team emphasizes bottoms-up decision-making, ownership, and accountability. As we qualify our engines, we are exploring modifications for future versions, including thrust upgrades, new cycles, and design for mass production. About the Role: This role may span several areas depending on your skills and the team's needs. Core responsibilities include driving engine system trades (architecture + CONOPS), managing engine interfaces, negotiating requirements to optimize vehicle integration, and supporting overall engine system development. Additional tasks may involve analysis, simulation, testing, and tool development. You will coordinate with technical teams and apply your deep technical expertise to solve complex problems. Success in this role requires leading collaborative projects with minimal oversight, being a self-starter eager to learn and improve, and having a significant influence in a fast-growing startup environment. The role involves approximately 15% travel to test and launch sites and may require shifted schedules or weekend work for critical milestones. About You: Experience applying engineering fundamentals in fluid mechanics & thermodynamics Proven ownership, problem-solving, and team collaboration skills from academic or professional experience Drive to meet ambitious schedules with creative solutions Bachelor's degree in science, engineering, technology, or mathematics Working knowledge of liquid-propellant rocket engines 8+ years of relevant experience, preferably in complex engineering systems and testing environments Nice to Have: Knowledge of fluid components like valves and instrumentation Knowledge of engine subsystems such as combustion devices and turbomachinery Relativity Space values transparency and fairness in compensation. Actual salary will depend on experience and qualifications. Our total rewards include competitive salary and equity, generous PTO and sick leave, parental leave, an annual learning stipend, and more. For details, please visit our benefits page. Hiring Range: $176,000—$225,500 USD We are an equal opportunity employer and do not discriminate based on various protected statuses.

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