Electronics Engineer

  • 91370 Verrières-le-Buisson, France (PARIS)
  • International environment, Very good English
  • Space and Aviation manufacturing
  • Min 5 years of experience minimum
  • 65 000€ per year

We are hiring for a company which is a pioneering space technology company specializing in advanced propulsion systems for small satellites. They are global experts in satellite propulsion, pushing the boundaries of streamlined in-orbit mobility for the rapidly expanding satellite constellation industry. Their clients across the US, Europe, and Asia trust us to design and deliver high-performance, precision-engineered propulsion systems that push technological boundaries while meeting demanding timelines and budgets. They made history in 2019 and 2020 with the world’s first in-orbit demonstrations of a unique state-of-the-art fueled electric propulsion systems. Today, they are experiencing rapid growth, with over 300 systems ordered to date.


Your mission:

We are looking for an Electronics Engineer  to develop the advanced electronics and software powering of their propulsion systems. In this role, you will work on challenging problem, with complex electronic systems which require both high performance and exceptional reliability, all while operating in the extremes of the space environment.

As part of the Product Development Team, you are going to be at the intersection of cutting-edge research and mass production, transforming novel concepts into flight-ready systems that will shape the future of space propulsion. By joining them, you will be part of an international, collaborative, and creative team, that is passionate about developing our groundbreaking propulsion technology.

Main tasks and responsibilities

  • Create and refine advanced electronic hardware components, including PCB design, analogue and digital circuit development, and power management systems tailored for space propulsion applications. 
  • Develop and execute rigorous testing procedures to validate hardware performance and reliability under extreme conditions.
  • Utilize laboratory equipment for troubleshooting, debugging, and optimizing electronic systems.
  • Ensure electronics requirements are defined and properly followed, according to the global product design needs.
  • Contribute to the enhancement of hardware design processes, ensuring adherence to quality standards and best practices in the aerospace industry. 
  • Work closely with cross-functional teams—mechanical, software, industrialization engineers and physicists —to ensure seamless integration of hardware components within complete propulsion systems.

Required skills and qualifications

  • Masters degree in electronics engineering or related discipline.
  • Solid understanding of analogue and digital electronics design, including complex schematic diagrams.
  • Software development skills, with experience in creating small Arduino scripts or modifying existing software to autonomously test hardware designs is an asset.
  • Ability to build prototypes and debug them 
  • Background in design, simulation, prototyping and testing of power converters or similar. 
  • Proficiency with laboratory equipment for testing and debugging of electronics.
  • 5+ years industry experience is a nice to have.

For more than ten years, I’ve been driven by one idea — the future of Space and Defense depends on the people behind it. My career began in technical recruitment, where I had the privilege to hire engineers designing cutting-edge systems for aerospace and advanced manufacturing.

Co-founding Demexios was a natural next step: a way to transform my industry knowledge and relationships into a dedicated structure that helps clients recruit faster, smarter, and with strategic alignment.
Over time, I built long-term partnerships with companies leading technological sovereignty — from NewSpace startups developing electric propulsion to defense integrators modernizing tactical and surveillance systems. These collaborations allowed me to form a powerful network of decision-makers, project leaders, and experts who now trust Demexios to deliver when precision truly matters.
Today, my role is not just to connect candidates and companies — it’s to ensure that every hire strengthens our clients projects.

Across the landscape of global security, Matthieu Konarzewski was forging his path in the defense sector. With a robust background collaborating with startups and international firms in software, health, fintech, and beyond, Matthieu honed his dual skills in technology and talent acquisition over several forging experience.

His story took a defining turn during a high-stakes engagement with defense contractors, where he specialized in sourcing profiles for mission-critical roles in ballistics, radar systems, and high-security embedded technologies. Imagine Matthieu navigating the complexities of international defense networks, identifying experts in GNC (Guidance, Navigation, and Control) and FPGA development to fortify teams against emerging threats. “I’ve learned how a talented team makes all the difference in achieving concrete results,” Matthieu shares, emphasizing his commitment to being a reliable partner in building resilient organizations.

His focus on defense profiles has led to seamless placements that enhance national security and industrial innovation, all while fostering long-term client relationships.