Senior Embedded Software Engineer .

Celag Sàrl, Lausanne, Switzerland

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Published on 23 September 2026 · first appeared in our records on 24 September 2026.

Stable posting: first seen on 24 September 2026, with no abnormal reposting.

This posting shows no salary, while 0% of open postings in the same sector in this country (Switzerland) do.

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--- base: meta-keywords: meta-viewport: width=device-width, title: Senior Embedded Software Engineer (Firmware / Zephyr RTOS). --- Senior Embedded Software Engineer (Firmware / Zephyr RTOS). =========================================================== Senior Embedded Software Engineer (Firmware / Zephyr RTOS). Senior Embedded Software Engineer (Firmware / Zephyr RTOS). =========================================================== For one of our customer, we are looking for a Senior Embedded Software Engineer (Firmware / Zephyr RTOS). ----------------------------------------------------------- As a senior developer, you will join a dynamic team working on a strategic project. You will work alongside a developer and a lead developer to contribute to the development and optimization of firmware for new, cutting\-edge products. **Your responsibilities:** * Develop and maintain firmware in C/C\+\+, primarily on Zephyr RTOS. * Work with STM32 microcontrollers, including bootloader management. * Design and implement drivers for various peripherals, such as user interface components (buttons, capacitive sensors, analog sensors, haptic actuators). * Develop and integrate communication interfaces: Wi\-Fi, UART, and proprietary protocols over serial interfaces (SPI). * Contribute to firmware testing, test automation, and CI pipelines. * Collaborate closely with the team to ensure seamless integration and optimal firmware performance. Required experience: * 3\+ years of embedded software / firmware development experience in C/C\+\+ * Expert\-level knowledge of Zephyr RTOS * Strong hands\-on experience with Arm Cortex\-M microcontrollers, including bootloaders ( MCUboot) * Solid knowledge of communication interfaces and protocols: Wi\-Fi, UART, SPI * Experience integrating wireless chipsets or modules with a host microcontroller * Experience in test automation for embedded systems * Proficiency in Python programming * Hands\-on experience with CI tools and processes * Experience using automation tools across Windows and Linux platforms * Solid understanding of software development best practices * A strong belief in and experience with Agile methodologies * Excellent problem\-solving skills and a collaborative, service\-oriented mindset * The ability to clearly communicate complex technical concepts * Soft skills: authenticity, openness, collaboration, humility, curiosity, and a bias for action Preferred skills: * Experience with Alif Semiconductor microcontrollers (Ensemble / Balletto families) * Experience with Infineon wireless solutions (AIROC Wi\-Fi / Bluetooth) * Knowledge of the BLE protocol * Experience testing human interface devices (HID) * Familiarity with GitHub, GitHub Actions, and Artifactory * ISTQB certification Languages: * Fluent in English and French (spoken and written) Education: * Bachelor's or Master's degree in Computer Science, Computer Engineering, Electrical Engineering, or a related field, or equivalent practical experience ![Celag Sàrl]( ) * Celag Sàrl Rue des Philosophes 31 1400 Yverdon\-les\-Bains * [](<>) jpidd778f11jm jpit0939jm jpiy26jm

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