Why us?

POLARIS Raumflugzeuge GmbH develops innovative transportation systems that redefine access to space for payloads and passengers. We are continuing to expand our team and are looking to fill the position of Turbopump Design Engineer (m/f/d).

Your mission

• Design and develop turbopumps for LOX/RP1 rocket engines
• Perform rotor dynamic, fluid dynamic, thermal, and structural analyses of turbopump components
• Use CFD, FEA, and 0D/1D system modelling tools for performance prediction and optimization
• Work on shaft seals, bearings, and lubrication systems
• Collaborate with cross-functional teams, including propulsion, mechanical, and materials engineers, to integrate turbopump systems into the overall rocket engine design
• Define and verify key performance parameters, such as flow rates, pressures, and efficiency, through simulation and testing
• Close collaboration with analysis, manufacturing, procurement, quality, and suppliers
• Oversee the testing and validation of turbopump components and systems to ensure compliance with aerospace standards

Your profile

• Degree in Space Engineering, Aerospace Engineering (M.Sc.) or similar
• Minimum of 2 years of full-time experience
• Extensive knowledge in turbomachinery, including pumps, turbines and their integration
• Profound understanding of physics, fluid dynamics, manufacturing processes, rocket engine/propulsion systems
• Deep understanding of cryogenic fluids (e.g., LOX) and materials suitable for high-pressure, high-temperature environments.
• Proficiency with Creo and ANSYS Fluent for design and verification
• Proactive thinking, high level of motivation, flexibility, and team-working skills
• Proficiency in both German and English

What we offer

• Long-term prospects with a permanent employment contract
• Being part of an international, highly motivated team
• Flat hierarchies and short decision-making processes
• Flexible working hours
• Use of our company fitness program with EGYM Wellpass
• Take benefit of attractive employee discounts through Corporate Benefits
• The opportunity to contribute your ideas and actively shape the company

Join us in shaping the future of space transportation and making a positive impact. If your profile fits our requirements, apply now by sending your complete application portfolio, including CV, certificates and a cover letter outlining your relevant experience and why you are the ideal candidate for this role.

About us

Our mission is to pioneer a new era of space transportation by flying to space and back like an aircraft — taking off and landing at airports, and reusing our spaceplanes for hundreds of missions. We combine unprecedented cost efficiency with unique flexibility and safety, enabling breakthrough advances in both space transportation and hypersonic flight. This vision is currently pursued by almost 80 employees every day.

At POLARIS we value on-site collaboration, so we generally do not offer home office. Please apply only if you feel comfortable with this working model – it saves valuable time for everyone involved.