Product Owner

  • 91370 Verrières-le-Buisson, France (PARIS)
  • International environment, Very good English + French is a plus
  • Space and Aviation manufacturing
  • Min 3 years of experience minimum
  • 70 000€ / 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.

As a Product Owner, you will play the important role of ensuring the technical success of the product. You will be responsible for following the product life cycle of the JPT150, the first iodine-filled Hall thruster to be used in space. You will interface with different teams, based on the maturity of the product, bringing knowledge and expertise across all technical teams. You will actively participate in the development of JPT150, driving the improvements and updates of the design, as well as accompanying it through in-orbit demonstration mission, lifetime test and industrialization process at a later stage.

As part of the Product Management team, you will interface with all aspects of the creation of the product, from early conception to production. This role requires a dynamic and multitasking individual who will drive people forward with strong expertise and a positive attitude.

Key responsibilities:

  • Ensure the product’s success from all technical aspects.
  • Defining and communicating the product vision and strategy.
  • Managing the product lifecycle and driving product enhancements.
  • Follow the product throughout its development cycle, interfacing with the different teams.
  • Collaborating with engineering teams to define product architecture and design.
  • Assemble and lead the debugging task forces when needed.
  • Report directly to the Head of Product Management Team.

Skills and qualifications:

  • PhD in Plasma Physics or a similar technical discipline is required, a MSc can be considered if paired with relevant work experience. Technological excellence is the most important criterion.
  • 2+ years of work experience in a space sector industry (not including studies).
  • Strong soft skills and great communication for interfacing with different teams and key clients.
  • Experience with space system engineering and design.
  • A driving personality and positive attitude.
  • Excellent communication skills in written and spoken English (French is a plus)

The successful candidate should be a self-starter with a passion for space technologies and the commercial space industry. Experience in design and development of new products is a plus. We value a proactive and inquisitive mindset, and the ability to work collaboratively with cross-functional teams.

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.