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# Senior Firmware Engineer

- **Company:** Littelfuse
- **Location:** Álava, Spain
- **Contract:** Permanent contract
- **Skills:** C (Programming Language), ARM Architecture, Communications Protocols, Software Debugging, Ethernet, Firmware, Failure Mode Effects Analysis, Joint Test Action (IEEE Standards), Modbus, Real-Time Operating Systems, Software Engineering, System Testing, Universal Asynchronous Receiver/Transmitter, System-level Testing, Information Technology
- **Published:** July 27, 2026
- **Apply:** https://www.buscojobs.com.es/senior-firmware-engineer-en-alava-ID-364722700

## About the Role

The candidate must be self?motivated and comfortable navigating uncertainties and customer?driven design requirements.
The role requires an understanding of the protection legacy that Littelfuse has established and the ability to collaborate across the business to draw upon that strength.
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 Job:Develop 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 meets the requirements of UL ****, IEC *****, IEC *****, and ISO *****.Develop DFMEA for safety?critical components and systems.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.Support occasional travel as required to evaluate suppliers and support production ramp?up.Develop and execute protection system components and system qualification and reliability test plans.Provide regular project
updates as part of the overall project planning and execution.About you:MS 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 with communication protocols (SPI, I2 C, UART, Modbus, CAN, Ethernet).
Working knowledge of cryptography, algorithms and encryption for embedded devices.Hands?on experience with hardware bring?up, debugging tools (JTAG, oscilloscopes, logic analyzers).
Experience developing firmware for safety?critical applications, including the ability to support product compliance testing.Demonstrate an entrepreneurial spirit, willingness to experiment and be able to manage ambiguity.We are an equal?opportunity employer that takes pride in giving every associate the means and courage to make a difference - everywhere, every day.

## Description

As aSenior Firmware Engineer, you will be responsible for the embedded firmware architecture, design, unit?level, and system testing of new solid?state components and systems.The candidate must be self?motivated and comfortable navigating uncertainties and customer?driven design requirements.The role requires an understanding of the protection legacy that Littelfuse has established and the ability to collaborate across the business to draw upon that strength.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 Job:Develop 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 meets the requirements of UL ****, IEC *****, IEC *****, and ISO *****.Develop DFMEA for safety?critical components and systems.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.Support occasional travel as required to evaluate suppliers and support production ramp?up.Develop and execute protection system components and system qualification and reliability test plans.Provide regular project updates as part of the overall project planning and execution.About you:MS 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 with communication protocols (SPI, I2 C, UART, Modbus, CAN, Ethernet).Working knowledge of cryptography, algorithms and encryption for embedded devices.Hands?on experience with hardware bring?up, debugging tools (JTAG, oscilloscopes, logic analyzers).Experience developing firmware for safety?critical applications, including the ability to support product compliance testing.Demonstrate an entrepreneurial spirit, willingness to experiment and be able to manage ambiguity.We are an equal?opportunity employer that takes pride in giving every associate the means and courage to make a difference - everywhere, every day.


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