Senior PLC Engineer

About the Role

Cosylab's team, working on control systems for accelerators and complex medical devices for radiation therapy, is looking for a new team member.

As a Senior PLC Engineer, you will primarily work with Beckhoff TwinCAT and motion control, strengthening our PLC team and eventually taking on technical ownership of challenging projects in the medical domain. Your work will directly contribute to systems where precision and reliability are essential.

Working on innovative scientific and technological achievements can be both personally and professionally enriching. You will have the opportunity to contribute to projects that have the potential to change the world and make a real impact on society.

Key Tasks and Responsibilities

• Developing PLC software solutions in TwinCAT.
• Analyzing requirements, proposing technical solutions.
• Write clean, readable, and well-structured code.
• Documenting and thoroughly testing your work.
• Collaborating with the client and the internal teams.
• Gradually take on technical ownership of projects, delegate tasks, and mentor colleagues.

Required Qualifications and Skills

• Proven experience in Beckhoff TwinCAT 3 programming and deployment.
• Strong understanding of motion control systems (servo drives, axes synchronization, kinematics).
• Proficiency in structured text (ST) and object-oriented programming concepts in TwinCAT.
• Experience with real-time PLC applications and fieldbus systems (e.g., EtherCAT).
• Strong communication and interpersonal skills with the ability to build strong relationships and collaborate effectively with internal and external stakeholders.

»Bonus« points if you have

• Ability to read and interpret electrical and mechanical schematics.
• Familiarity with industrial automation safety standards and debugging tools.
• Knowledge of scripting and higher-level programming (Python, C#, ...).
• Experience with GIT.
• Experience in collaboration in pre-sales engineering.

Education

• B.Sc. in Electrical Engineering, Computer Science, Physics, Mathematics, or other related technical disciplines.
• Fluency in spoken and written English.

What we offer

• Employment contract for an indefinite period with a six-month probationary period.
• A work environment with flexible working hours and a hybrid work model.
• Plenty of personal and professional growth opportunities combined with a competitive and periodically updated salary tailored to your skills, experiences, and results.
• Interesting work, full of challenges in an international working environment.
• High-impact learning culture: regular in-house and external training sessions and a team of international professionals eager to help you grow.
• Many recreational after-work activities, additional health insurance (Specialists+), unlimited coffee, soft drinks, fruit, and other well-being goodies.
• Cosylab events (Teambuilding, Picnic, New Year's Party, …).

You will fit perfectly if you share these values

• Think bold
  : We deliver exceptional solutions through courageous thinking, open communication, and the drive to continuously improve.
• Be modest:
  We set our egos aside in actively listening, respecting one another, and embracing the diversity of experience and perspective across the company.
• Work smart:
  We know we get more accomplished by working together, being accountable, focusing our efforts, and going the extra mile.
• Enjoy life:
  We prioritize balance and positivity, nurturing personal wellness and celebrating successes.
• Do good:
  We support one another and are passionate about solving difficult problems that ultimately help make the world a better place.

Apply latest by by Monday, November 10, 2025. Your application should include:

• CV,
• brief motivational letter and
• potential recommendations or references.

We're looking forward to meeting You

The Cosylab Team