Why us?

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 and Simulation Engineer (m/f/d).

Your mission

We are looking for a detail-oriented hands-on engineer (m/f/d) to design, execute and manage turbopump design and integration activities for our spaceplane demonstrators. In this role, you will work with cross-functional teams-mechanical, electrical, fluid system and control-to validate turbopump performance, reliability, and safety. 

• Design and develop turbopumps for LOX/RP1 linear aerospike rocket engines.
• Use CFD, FEA, and analytical system modelling tools for performance prediction and optimization of key performance parameters like mass flow rates, pressure differences and overall efficiency.
• Re-iterate the design by performing FEA and CFD analysis.
• Collaborate with cross-functional teams, including propulsion, structures, and fluid system engineers, to integrate turbopump into the rocket engine unit.
• Selection of suppliers and components in close collaboration with manufacturing and procurement teams 
• Conduct hydrodynamic sizing, design, and analysis work for inducers, impellers, diffusers, nozzles, turbines, and other turbomachinery.
• Additionally, design the accessories for the pump, including casing, shaft seals, bearings, and lubrication systems. 
• Support turbopump testing team for data review and inspections.
• Perform fault tree investigations and root cause analysis

Your profile

• Master’s degree in Mechanical or Aerospace Engineering (or related field) with 2-3 years of experience, or Bachelor’s degree in Mechanical or Aerospace Engineering with 4-5 years of relevant experience.
• Demonstrated experience in turbomachinery including high-performance pumps, rotors, turbines, volutes, nozzles, shafts, seals, and bearings. 
• Strong foundation of gas-turbine thermodynamics, fluid mechanics, material science, rocket propulsion systems, hydrodynamic/aerodynamic design, and fundamentals of turbomachinery.  
• Extensive knowledge of cryogenic fluids (e.g. LOX) behavior in high temperature and high-pressure environments.
• Proficiency with CAD software (CREO/CATIA/Solidworks) as well as FEM/CAD simulation software (Ansys Workbench)
• Excellent written and verbal communication; able to produce clear technical documentation.

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.