Systems Architect F/H

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Published on 10/11/2026

  • Contract type:  Permanent contract

  • Work time:  Full time

  • Location Rennes

The company

Founded in 2013, Cailabs designs, manufactures, and develops innovative photonic solutions for the space, industry, telecommunications, and defense sectors. A global specialist in laser shaping, the company has accelerated its growth in the space field with turnkey optical ground stations that integrate atmospheric turbulence compensation technology. This makes it one of the first companies to harness very high data rates enabled by optics in a commercial ground station.

Cailabs currently has more than 200 employees, including 41PhDs. With 29 patent families filed, the company is one of the most innovative companies in France. It is headquartered in Rennes, with offices in Paris and Washington (USA).

Post description

Would you like to use your experience in systems architecture to contribute to the development of complex technological products? Do you enjoy taking a step back to tackle multidisciplinary challenges and bringing together experts from a wide range of technical fields?

Join Cailabs!

 

As part of the Systems Architecture team, you will work closely with Technical Leads, other Systems Architects and experts from various technical disciplines.

Your role will be to provide an end-to-end view of the system, from understanding requirements through to integration and compliance demonstration. You will ensure the consistency of technical choices, effective interface management and end-to-end performance of systems combining optics, telecommunications, software, electronics and mechanics.

You will also play a key role in supporting technical decision-making by structuring and challenging technical topics, bringing together different areas of expertise and synthesizing analyses to facilitate trade-offs.

 

Your responsibilities: 

  • Gather and analyze needs and translate them into clear, consistent and traceable system requirements.
  • Define and develop functional and technical system architectures, while managing interfaces between the various subsystems.
  • Conduct multidisciplinary analyses, trade-off studies and impact assessments to ensure overall system performance.
  • Facilitate discussions with technical experts to align technical choices and support decision-making.
  • Contribute to system integration, verification and validation.
  • Build on existing architectures and contribute to their standardization to develop robust, repeatable and industrializable solutions.

Profile required

Yous strengths: 

  • You hold a Master’s degree or equivalent and have at least 5 years of experience working on complex technical systems or products.
  • You have a strong command of systems engineering fundamentals, including requirements, architecture, traceability, trade-off studies and impact analysis.
  • You have expertise in at least one technical field, such as optics, telecommunications, software, electronics or embedded systems, while being able to maintain a comprehensive view of the overall system.
  • You are curious, rigorous and pragmatic, with the ability to step back and take a broader perspective on complex technical challenges.
  • You are comfortable working cross-functionally and know how to communicate effectively and bring together experts from different technical backgrounds.
  • Experience in the space, aerospace, defense or telecommunications industries, as well as knowledge of tools such as Polarion, Enterprise Architect or Capella, would be appreciated.

By joining Cailabs, you will find: 

  • A role at the heart of technical decision-making for complex, multidisciplinary systems.
  • Close collaboration with Technical Leads and technical experts.
  • Cutting-edge photonics technologies, particularly for space laser communications.
  • A technology-driven company working across the entire product lifecycle, from prototype development through to industrialization.
  • An environment where you can have a direct impact on the consistency and robustness of our solutions.

Avantages

  • Plenty of opportunities to connect and enjoy time together: annual company seminar, team meals, games, sports activities and more.
  • 100% employer-covered health insurance.
  • A bonus scheme rewarding both collective and individual performance.
  • Relocation support if you are moving to Rennes.

Required languages

  • English English - Level advanced

Réf: 4d81155a-9dd0-4658-b237-9e0b0fa1db47

Apply

Systems Architect F/H

Permanent contract
Full time
Rennes

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