Senior Firmware Engineer
LittelfuseSan Sebastián, Autonomous Community of the Basque Country, Spain
Posted January 20, 2026
Full Time
About the Company
Littelfuse is a leading global manufacturer of electronic components serving more than 100,000 end customers across industrial, transportation, and electronics end markets.
Job Description
Littelfuse is seeking a Senior Firmware Engineer to develop and qualify embedded designs, establish safety-critical software process, and engage with contract manufacturers. The role requires 10+ years of experience designing embedded firmware for ARM architectures, experience with communication protocols, and working knowledge of cryptography, algorithms, and encryption for embedded devices.
Requirements
- 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
- Experience with communication protocols (SPI, I2C, 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
