Industrial Software Engineer F/H

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Published on 10/07/2026

  • 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 join a human-sized company and work at the heart of innovative projects within a multidisciplinary team combining software, electronics, optics, and industrial systems?

Join Cailabs!

As an Industrial Software Engineer, your role will be to develop, maintain, and enhance the control and monitoring software of our OGS subsystems. You will be involved in the programming of industrial automation systems (PLCs).

Your main responsibilities will include:

  • Leading the design, implementation, and maintenance of software intended for use in complex and innovative industrial environments.
  • Contributing to the design and development of industrial software using appropriate programming languages.
  • Testing and debugging developed software to ensure quality and reliability.
  • Maintaining and supporting software solutions once deployed to production.
  • Participating in the drafting of technical documentation for developed software.
  • Managing subcontracted developments and ensuring proper follow-up of outsourced activities.
  •  

Profile required

Holding a Master's degree (Bac+5) in Software Development, Industrial Computing, Automation Engineering, or an equivalent field, you have at least 5 years of experience in software development, validation, and integration, ideally within an industrial environment.

  • You have experience programming industrial PLCs, including safety systems.
  • You are comfortable with object-oriented software development, preferably in Python.
  • You are able to bridge software, electronics, and hardware, particularly during integration and commissioning phases.
  • You are proficient in English, especially for writing technical documentation and interacting in installation and deployment contexts.
  • You are rigorous, autonomous, and proactive.
  • You enjoy collaborating with a variety of technical stakeholders.

Nice to Have

  • Knowledge of electrical control cabinet wiring.
  • Previous experience integrating electromechanical components.
  • Familiarity with the Beckhoff environment.
  • An interest in mentoring and knowledge sharing.

Réf: 8acabbfb-dbe4-40fc-b361-32da2a807002

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Industrial Software Engineer F/H

Permanent contract
Full time
Rennes

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