Internship 2026 – 0D / 1D Multiphysics Modeling

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 capabilitiesà—more efficient, cost-effective, safer, and sustainable.

Joining us :

Join the adventure at HyPrSpace, where innovation, collaboration, and humor blend to create groundbreaking advancements in space propulsion.

As part of the #SpaceBakers team, you’ll contribute to a unique, patented technological leap, embarking on the full lifecycle development of a launch vehicle. Immerse yourself in an environment that prioritizes a "test and learn" philosophy, ensuring your ideas not only take flight but soar.

At HyPrSpace, your work directly impacts our trajectory towards success, offering rapid skill development in an iterative, hands-on approach.

Enjoy competitive compensation and flexible working conditions, all within the vibrant surroundings of Bordeaux, a nexus of culture, viniculture, and coastal life !

Role overview :

As a 0D / 1D Modeling Intern at HyPrSpace, you will support the development of our hybrid propulsion technologies and associated fluid systems (LOx, pressurization, cryogenic circuits). You will contribute to the development, improvement, and validation of physical models used for the design and analysis of hybrid combustion chambers and complete fluid systems.

Your key responsibilities :

As part of your internship and in direct connection with your academic training, you will be involved in the following missions :

0D / 1D Model Development :

Build and improve models for :

Implement custom physical laws (hybrid regression models, conduction / radiation, pressure losses, etc.)

Hybrid combustion chambers (regression laws, heat transfer, mass / energy balance)

Fluid systems (GN2 / He, LOx, feed circuits, injectors)

Heat exchangers, valves, lines, calibrated orifices, blow-down systems

Simulation & Analysis :

Run simulation campaigns and perform post-processing

Identify model improvements and contribute to numerical stability

Compare results with experimental data from engine tests

Documentation & Industrialization :

Write technical notes on models and results

Structure the models for reusability and team integration

Develop complementary Python tools (post-processing with CoolProp, automated scripts, etc.)

Internship Details : Duration : 6 months

Start Date : January – April

Work Schedule : Full time

Location : On-site, Le Haillan, 33185, France

Who we are looking for :

Currently pursuing a 3rd year engineering degree or 2nd year Master’s in Thermal Engineering, Fluid Mechanics, Space Propulsion, or Numerical Modeling.

Experience with 0D / 1D modeling tools (e.g., ESPSS / EcosimPro, Simscape, AMESim…).

Programming experience in Python (NumPy, SciPy, CoolProp).

Knowledge of thermodynamics and compressible flow.

Knowledge of hybrid propulsion is a strong plus.

Tools / Software skills : ESPSS, Python (NumPy, SciPy, CoolProp).

Soft skills : rigor, curiosity, autonomy, and a strong interest in simulation and complex physical systems.

Autonomous and proactive mindset — test & learn !

What We Offer :

In return for your expertise and dedication, we're offering :

The opportunity to develop and validate models supporting hybrid propulsion systems

Hands-on experience with state-of-the-art propulsion and fluid systems

Mentorship from experienced engineers in a dynamic startup environment

Professional growth and development opportunities within our propulsion team

Apply!

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