Guillaume Ruetsch

Firmware Engineer

Saint-Louis, Grand Est, France

About

Firmware Engineer with a background in embedded systems and real-time software development for high-reliability applications. Experienced in designing low-level drivers, developing RTOS-based systems, and collaborating closely with multidisciplinary teams. Passionate about applying technology to solve real-world problems, especially in regulated and impactful fields.

Experience

  • AMETEK CTS (Permanent · 6 yrs 11 mos)
    • Firmware Engineering Teamleader
      Apr 2026 - Present · 3 mos

    • Firmware Engineer
      Aug 2019 - Mar 2026 · 6 yrs 8 mos

      Developed embedded C/C++ firmware for ARM Cortex-M microcontrollers (mostly STM32 products) to control EMC test equipment, including Burst, ESD, and Surge generators. Designed and implemented low-level drivers (I2C, SPI, UART, USB, Ethernet) for communication with sensors, displays, and high-voltage modules. Integrated and fine-tuned real-time functionalities using FreeRTOS to meet timing-critical requirements of compliance testing. Used Git for version control and participated in code reviews to maintain high code quality and traceability. Worked closely with international teams (hardware, mechanical, test engineering) to deliver robust and reliable embedded systems for critical applications.

  • Actemium Controlmatic Gmbh (Weil am Rhein (DE))
    • Planning Engineer
      Aug 2018 - Aug 2019 · 1 yr 1 mo

      Realized the hardware part of the automation of a sewage processing station, from the conception of the electrical scheme to the commissioning.

    • Engineer Internship
      Feb 2018 - Aug 2018 · 7 mos

      Realized the hardware part of the automation of a sewage processing station, from the conception of the electrical scheme to the commissioning.

  • Internship as Business Engineer’s Assistant at Santerne Alsace - Vinci Energies
    Jun 2017 - Jul 2017 · 2 mos

    Assist an business engineer in the globality of his job content - Follow-up from the business with customer and supplier - Creation of technical files for the business

  • Internship at Endress+Hauser Group
    Jul 2016 - Aug 2016 · 2 mos

    Actively involved with a production team with flexible working hours (sector DC-OP) - Assembly / Disassembly of pipes on their respective equipment