Turbopump Design Engineer (m/w/d)

POLARIS Raumflugzeuge GmbH develops innovative transportation systems that redefine access to space for payloads and passengers. As we expand our operations, we are seeking a skilled and driven individual to join us at our headquarters in Bremen as a Turbopump Design Engineer.

Join our dynamic and fast-growing startup and be part of our exciting journey to revolutionize space transportation and hypersonics. We are a passionate team dedicated to pushing boundaries, fostering innovation, and creating impactful solutions that make a difference.

• 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 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
• Oversee the testing and validation of turbopump components and systems to ensure compliance with aerospace standards 

• Successfully completed aerospace or mechanical engineering degree (M.Sc./M.Eng.) 
• Minimum of 5 years of experience in turbopump design. Direct experience with LOX/RP1 systems is highly preferred
• Extensive knowledge in turbomachinery, including pumps, turbines and their integration 
• Proficiency with CAD (Creo/Inventor) and CFD (ANSYS Fluent) software for design and verification 
• Work experience in a start-up environment is an advantage 
• Deep understanding of cryogenic fluids (e.g., LOX) and materials suitable for high-pressure, high-temperature environments
• Familiarity with rocket propulsion systems and turbopump architecture
• Hands-on experience in building and testing prototype pumps 
• Proactive thinking, high level of motivation, flexibility, and team-working skills 
• Proficiency in both German and English 

Join us in shaping the future of space transportation and making a positive impact. 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. We look forward to welcoming you to our team!