R&D Engineering Internship – Optical Systems Calibration F/H

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Published on 27/10/2026

  • Contract type:  Internship - 6 months

  • 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

You will join the Research & Development teams working on free-space optical communication solutions. The internship will be carried out under the supervision of your internship supervisor, in close collaboration with the Software Development and Verification & Validation teams.

 

The aim of the internship project is to improve the calibration algorithms used in optical systems integrated into optical ground stations.

 

At the intersection of optics, instrumentation and software development, this internship will give you the opportunity to compare the physical behaviour of optical systems with the performance of calibration algorithms.

 

After analysing the performance and limitations of the existing calibration methods, your objective will be to design, develop and validate new approaches to improve the robustness, accuracy, speed and automation of our calibration algorithms.

 

You will develop these algorithm improvements in Python and experimentally evaluate the solutions using our existing test facilities. To do so, you will define test plans and performance criteria to validate your algorithms.

Profile required

Key skills:

  • Third-year engineering student or final-year Master’s student (Master 2), specializing in optics or scientific instrumentation, with a software development component
  • Advanced programming skills in Python for scientific computing, data processing and analysis, as well as a good understanding of software development fundamentals
  • Good knowledge of geometrical optics

Nice to have:

  • Experience in experimental data analysis
  • Experience in image processing
  • Curiosity and a strong interest in studying and modelling complex real-world systems
  • Rigorous and able to work independently

Work environment:

  • An innovative, fast-growing company
  • A young and dynamic team
  • 35-hour working week, Monday to Friday

By joining Cailabs, you will find:

  • A dynamic team of engineers and PhD graduates who share your desire to apply their skills to stimulating technical challenges
  • A collaborative environment that encourages knowledge sharing and provides strong intellectual stimulation
  • A cutting-edge technology company, working from prototype development through to industrialization

And also:

  • Opportunities to connect and enjoy time together as a team (annual seminar, team meals, games, sports activities, etc.)
  • A modern and pleasant working environment designed to encourage collaboration
  • Meal vouchers

Finally, joining Cailabs means benefiting from an environment where everything is done to support you in developing new skills.

More information: Cailabs website

Réf: aadd7ae8-3601-46c6-a9f9-b44505f7c382

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R&D Engineering Internship – Optical Systems Calibration F/H

Internship - 6 months
Full time
Rennes

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