Why us?

POLARIS Raumflugzeuge GmbH develops innovative transportation systems that redefine access to space for payloads and passengers. With now 70 dedicated colleagues, we are working at two locations to make our vision reality. We are continuing to expand our team and are looking to fill the position of a Rocket Engine Flow Simulation Engineer (m/f/d).

Your mission

• Perform CFD simulations for liquid rocket engines with a focus on hot gas flow and cooling channel analyses
• Analyze combustion flows, conjugated heat transfer (CHT), pressure losses, and flow instabilities
• Simulate regenerative cooling systems and assess thermal loads
• Support the design of combustion chambers, nozzles, and cooling structures through numerical analysis
• Couple CFD results with thermal and structural analyses
• Validate and calibrate CFD models using experimental and test data
• Conduct trade studies to optimize performance, efficiency, and thermal margins
• Work closely with design, systems, test, and manufacturing teams
• Document models, assumptions, results, and design recommendation

Your profile

• Degree in Space Engineering, Aerospace Engineering (M.Sc.) or similar
• Minimum of 2 years of full-time experience
• Strong background in CFD, particularly for compressible flow, supersonic flow, hot gas flow conjugated heat transfer, cryogenic flow, reactive flows in rocket engines
• Profound understanding of fluid dynamics, thermodynamics, and heat transfer
• Profound understanding of cooling channel design
• 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
• 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

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.