Fluidic Engineer

About Exotrail

Space is becoming more strategic and competitive than ever. Tomorrow’s space leaders will not simply launch satellites into orbit, they will be able to move them, reposition them, extend their lifetime, and maximize their performance in space.

Since 2017, Exotrail has been developing and operating cutting-edge in-space mobility solutions for commercial, institutional, and defense customers. From our high-performance propulsion system spaceware™ to our orbital transfer vehicle spacevan™, we enable satellites to go farther, stay operational longer, and achieve more.

Today, more than 200 Exotrailers across Massy and Toulouse are working together to make space operations more efficient and sustainable.

Backed by over €75 million in funding, we are pursuing a clear mission:

Making space a sustainable frontier for future generations.

Job Description

We are looking for a Fluidic Engineer at our Massy site, to support the rapid growth.

Attached to the System Engineer Team, you will be responsible for the design, modelling, and optimisation of fluidic systems associated with electric space propulsion engines. The role ensures their performance and integration into propulsion systems.

The Fluidics Engineer contributes to all phases of development, from specification to validation, working closely with the Mechanical & Thermal department, other technical departments when required, and suppliers.

Fluidic Design and Architecture

• Design fluidic circuits for propulsion systems.

• Size fluidic components, including pressure regulators, control devices, and fluid transport lines.

• Define technical solutions that ensure stability, fluid cleanliness, and compatibility with other materials.

Modelling and Simulation

• Perform CFD simulations to understand internal phenomena, including fluid flows, pressure, and thermal effects.

• Model propulsion system performance.

• Investigate critical phenomena, including flow fluctuations, instabilities, and contamination.

• Correlate numerical models with manufacturer data and test results.

Specifications and Documentation

• Write fluidic specifications for equipment and systems.

• Contribute to requirements traceability from design through validation.

• Produce compliance matrices, calculation notes, and fluidic justification files.

• Prepare and present Design Justification Documents (DJD) for project milestones, including PDR, CDR, and QRR.

Validation and Testing

• Define the fluidic tests to be performed.

• Monitor test preparation and execution.

• Analyse test results and update fluidic models for correlation.

• Document the associated justifications in accordance with ECSS standards.

Project Support and Interfaces

• Communicate with component suppliers, including suppliers of valves, high-pressure lines, and pressure regulators.

• Participate in the analysis of non-conformities and the management of fluidics-related deviations.

Preferred Experience

Technical Skills

• Strong command of fluid mechanics and thermodynamics in a space environment.

• Knowledge of electric propulsion systems and their constraints.

• Experience with CFD tools such as Ansys Fluent or equivalent.

• Experience with CAD tools such as SolidWorks or CATIA.

• Understanding and application of ECSS and NPR standards in fluidics.

• Knowledge of material compatibility with rare propellants.

• Knowledge of fluid contamination control requirements.

• Strong documentation skills and sense of responsibility.

• Ability to raise alerts in the event of technical or supplier-related deviations.

• Ability to report fluidic risks and identify needs for technical arbitration.

Soft Skills

• Ability to work across multiple technical disciplines.

• Rigorous and structured approach, with strong summarisation skills.

• Clear technical communication in French and English, with rigorous documentation.

• Strong organisational skills.

• Adaptability.

Why Join Exotrail?

Joining Exotrail means contributing to ambitious missions that are redefining space logistics and satellite operations.

You will work on cutting-edge technologies supporting future space missions while collaborating with passionate experts in a fast-growing international company at the forefront of the New Space industry.

What We Offer

• Company health insurance with 70% covered by Exotrail

• 50% reimbursement of public transportation costs

• Up to 2 days of remote work per week, depending on the position

• Enhanced maternity and paternity leave coverage with no seniority requirement

• Learning and development opportunities

• Well-being benefits including Moka Care, dedicated conferences, and our ExoCare Program for Moments That Matter

• 35 days of paid leave per year (Annual Leave & RTT)

Working Environment

• Modern industrial facilities in Massy

• Free coffee, tea, and fresh fruit available on site

• International and multicultural teams

• Dynamic and rapidly growing space company

Quality of Life at Work

• Team events and afterworks

• On-site osteopathy sessions on both sites

• Collaborative and supportive work culture

Recruitment Process

Our recruitment process is designed to be efficient while giving you the opportunity to meet the key stakeholders involved in the role:

• HR Interview with our Talent Acquisition team to discuss your background, motivations, and career aspirations.

• Hiring Manager Interview to explore your experience, skills, and fit with the team and projects.

• Technical Interview with our experts to assess your technical expertise and problem-solving approach.

• Final Interview to discuss the role, expectations, and answer any remaining questions.

We strive to provide feedback throughout the process and ensure a positive candidate experience.

We look forward to getting to know you and exploring how you can contribute to Exotrail's mission.