LFUS) is a diversified industrial technology manufacturing company shaping solutions for the safe and efficient transfer of electrical energy. Headquartered in Chicago, Illinois, USA, we serve customers across industrial, transportation, and electronics markets worldwide. With approximately 16,000 employees we design and manufacture innovative technologies that support electrification, energy efficiency, and advanced automation. Our integral reach is matched by a culture that empowers innovation and long‐term growth. As a Senior Firmware Engineer, you will be responsible for the embedded firmware architecture, design, unit level and system testing of new solid‐state components and systems. Join the team at Littelfuse that is developing new, self‐contained smart components and systems that deliver protection and control functionality to electrical systems. About the JobDevelop and qualify embedded designs as part of a safety critical component or system. Establish and execute unit level and system level tests and work with QA engineers to develop automated robust test suites.




Establish a safety critical software process that meet requirements of UL 1988, IEC 60730, IEC 61508, and ISO 26262. Engage with contract manufacturers or in house manufacturing to implement design, prepare design documentation, and evaluate production processes to assure components meet performance, reliability and cost targets.
Develop and execute protection system component and system qualification and reliability test plans. Provide regular project updates as part of the overall project planning and execution.
About youMS in Electrical Engineering, Computer Science or BS in Electrical Engineering, Computer Science with equivalent experience. 10+ years of hands‐on experience designing embedded firmware for 32‐bit/64‐bit ARM architectures, including experience with bare‐metal and RTOS based developments (Free RTOS, Zephyr). Experience developing firmware for safety critical applications, includi

📌 Senior Firmware Engineer Fully Remote (San Sebastián)
🏢 Littelfuse
📍 San Sebastián