Embedded Software Engineer (M/F)

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 an Embedded Software Engineer at our Massy site, to support the rapid growth. Attached to the System Engineer Team , you will contribute to the design, development, verification, and validation of embedded software dedicated to propulsion systems. You will also develop ad hoc software tools supporting testing and V&V activities.

Working closely with multidisciplinary teams, you will help ensure the quality, reliability, and compliance of software deliverables in accordance with space industry standards (ECSS, DO-178C, IEEE, MISRA) and internal development processes. You will collaborate with System, Electronics, Software, Test, Plasma, Mechanical & Thermal, Industrial, Quality, and Project teams in a highly technical and fast-paced environment.

Main responsibilities: Design, develop, test, and maintain embedded software for real-time constrained systems. Develop software tools for test benches, verification, and validation activities. Contribute to software requirements definition and ensure traceability between requirements, code, and tests. Define and execute automated test campaigns and support software qualification activities.

Collaborate with multidisciplinary teams on software architecture, technical reviews, and documentation Preferred Experience 💁‍♀️ Technical skills 3-5 years of experience in Embedded Software Strong proficiency in embedded C /C++ and Python for test automation tools. Experience with communication protocols such as CAN, RS422, RS485, and UART.

Knowledge of RTOS, low-level drivers, and embedded software architectures. Familiarity with ECSS, DO-178C, IEEE, and MISRA standards and development tools. Experience with GitLab , static analysis tools, debugging environments, and software configuration management. Soft skills Strong analytical, organizational, and problem-solving abilities.

Autonomous, rigorous, and detail-oriented mindset. Ability to work effectively within multidisciplinary and multicultural teams. Clear written and verbal technical communication skills. Professional proficiency in French and English . 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 Exo.

Care 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.