Optical Technician F/H

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Published on 21/11/2025

  • 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 150 employees, including 35 PhDs. 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 put into practice and develop your skills in assembling components in the field of optics?

Would you like to contribute to the manufacture of our products based on Cailabs' core technology?  

Then join the Cailabs Operations department!

Under the supervision of the workshop manager, you will take part in many stages of product assembly and make an active contribution to R&D projects in conjunction with the optical engineers.

Your main tasks will be to :

 

  • Assemble and align innovative optical systems,
  • Carry out system performance tests,
  • Record the performance of systems/sub-systems and ensure their reliability,
  • Resolve technical bottlenecks,
  • Participate in drafting and updating procedures,
  • Helping to define qualification processes for R&D projects (product robustness, in-chamber measurements, determining performance limits, etc.).

Profile required

  • You hold a 2–3-year degree (BAC+2/3) in photonic systems or an equivalent level, ideally a professional bachelor’s degree in LIOVIS.
  • You have at least 5 years of experience in an industrial environment and have worked on optomechanical systems.
  • You have worked in close collaboration with engineers.
  • You have experience in aligning and testing optical components.
  • You have knowledge of UV bonding and free-space optics micro-positioning.
  • You are meticulous, rigorous, and well-organized (the position requires good dexterity).
  • You are proficient with computer tools.
  • You are autonomous, proactive, and able to adapt to an evolving environment.
  • Your interpersonal skills are an asset for teamwork, both with Operations teams and R&D Technical teams.

Bonus skills:
You have knowledge of electronics (soldering and ESD awareness).

 

By joining Cailabs, you will find:

  • A dynamic team of engineers and PhDs who share your desire to apply their skills to stimulating technical challenges,
  • A collective drive and strong intellectual engagement in your work,
  • A company at the cutting edge of technology, from prototype development to industrialization phases.

And also:

  • Moments of sharing and friendly exchanges (annual seminar, team meals, group games, sports activities, etc.),
  • Health insurance covered at 100%,
  • A bonus system rewarding both collective and individual performance.

Joining Cailabs is, above all, the assurance that everything will be done to help you perform, improve, and take on new challenges.

More information at www.cailabs.com

Réf: ed2c7f9c-a0f1-4b4a-963e-1ad73feaf622

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Optical Technician F/H

Permanent contract
Full time
Rennes

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