CDI - Preliminary design engineer (m/w/d)

At HyPrSpace, we’re developing a hybrid rocket engine versatile enough to redefine the whole aerospace landscape. This is about making advanced propulsion affordable and accessible for a wide range of applications, from civilian to defense. Our technology is a game-changer for the entire aerospace sector : it is more efficient, cost-effective, safer and greener.

We’re a united team of 100+ (and still growing) aerospace enthusiasts developing a revolution in this industry : a patented hybrid rocket engine that actually works.

HYPRSPACE

POWERING AEROSPACE FUTURE WITH THE NEXTGEN PROPULSION TECHNOLOGY

At HyPrSpace, our mission is clear: to make advanced propulsion technology affordable and accessible for a wide array of applications, from civilian to defense. With our pioneering hybrid rocket engine, we're introducing a new era of aerospace capabilities—more efficient, cost-effective, safer, and sustainable.

Role overview :

By joining HyPrSpace as a Preliminary Design Engineer, you will be part of the Systems team (7 people) and play a key role in the early phases of our propulsion systems and launch vehicle development.

Reporting to the Systems Team Leader, you will work on the feasibility of new projects, develop new concepts, and propose improvements for both propulsion systems and vehicles. You will contribute to internal R&D projects as well as partner-driven studies.

Your role is central to technical decision-making: you will ensure the technical synthesis of preliminary studies, covering all relevant engineering disciplines (mechanical, thermal, aerodynamics, combustion, performance…), while integrating cost and manufacturability constraints from the earliest design phases.

Contract: Full-time – Permanent

Your key responsibilities :

In this role, you will:

• Conduct preliminary design and feasibility studies for new propulsion systems and launch vehicle concepts.

• Perform and/or coordinate multidisciplinary analyses, including mechanical, thermal, aerodynamics, combustion and performance aspects.

• Produce technical trade-offs and support decision-making by comparing concepts based on performance, risk, cost, and schedule.

• Ensure technical consistency and synthesis across all engineering disciplines involved in the studies.

• Take cost constraints, industrialization considerations, and manufacturability into account from early design phases.

• Contribute to technical documentation, clear synthesis notes, and engineering recommendations for internal and external stakeholders.

Your profile :

Education:

• Engineer (Master’s degree or equivalent) with a strong background in physics, mechanical engineering, aerospace, thermal sciences, or a related field.

Experience:

• Minimum 5 years of experience in engineering development roles.

• Experience in the space, aeronautics, or automotive industry.

Skills & competencies:

• Strong physical intuition and solid expertise in at least one technical domain (mechanics, thermal analysis, combustion, rocket science, or similar).

• Ability to understand, coordinate, and synthesize inputs from multiple engineering disciplines.

• Results-oriented mindset with excellent problem-solving skills.

• Rigorous, analytical approach with the ability to clearly structure and write technical analyses.

• Comfortable working autonomously while contributing effectively within a team.

• Curious, proactive, and eager to explore new concepts and solutions.

• Fluent in English.

Ready to launch your career with us and help develop engines that fly ?

Apply now and become part of our growing team of over 110 Space Backers shaping the future of launch systems! You will have a direct impact on real hardware that fires on a test bench, not just slideware and will join a small, agile team with short decision chains and high ownership.

HyPrSpace is an equal opportunity employer, committed to building a diverse and inclusive team. Our selection process is based on competencies requirements for positions only. If you are eager to make a significant impact, come as you are, we want to hear from you.

We propose you a competitive compensation, tickets restaurants (lunch-voucheon) for each working day, and 75% of your public transportation pass taken in charge.

We also highly value well-being by offering flexible working hours, a 300€-allowance for sport and regular team events. All within the vibrant surroundings of Bordeaux, a nexus of culture, viniculture, and coastal life !

Finally, in 2026, we launched a retrospective in the form of a virtual escape room: the Lift-Off Challenge. It is a blend of challenging puzzle-solving and our history, technology, and DNA, making it an excellent way for you to dive deeper into our universe! Of course, your participation in the Challenge will have no impact on the recruitment process.