Security Tester – Industrial Automation/Embedded Systems (f/m)

PHOENIX CONTACT BUSINESS SERVICES SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ is an international organization operating a Shared Services Center in Poznań, focusing on cybersecurity testing of industrial automation devices.

• Bachelor’s degree in computer science, cybersecurity, information technology or similar field.
• Strong programming skills in Python (experience with tooling, automation or protocol handling is a plus).
• Very good knowledge of Linux, including command line workflow, system configuration, and debugging.
• Excellent written and spoken English (min. B2 level).
• Practical experience working with communication protocols: understanding how protocol frames are structured, encoded, and transmitted.
• Analytical mindset and interest in cybersecurity testing.
• Good communication skills and willingness to learn new technologies.
• Willingness to occasional business trips to HQ in Germany.

Nice to have:

• Experience with fuzzing frameworks or vulnerability research.
• Familiarity with industrial communication protocols (e.g., Modbus, Profinet, EtherCAT).
• Basic understanding of embedded systems or industrial automation hardware.

• Develop and maintain tools for automated testing of industrial automation devices, mainly using Python.
• Extend existing testing frameworks and implement support for new communication protocols.
• Perform penetration testing and vulnerability assessments of industrial devices and communication interfaces.
• Identify, analyze, and document security vulnerabilities and test results in a clear and structured way.
• Collaborate closely with the development team.