Senior Firmware Engineer

Littelfuse (NASDAQ: 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 global reach is matched by a culture that empowers innovation and long-term growth.

Guided by our principles We Care, We Succeed With Our Customers, and We Own the Outcome, we work collaboratively, think boldly, and deliver solutions that move industries forward.

Join our engineering team as a Senior Firmware Engineer, where you’ll design and develop the embedded platform for our next generation of safety products. This role is critical to delivering innovative, self-contained smart components and systems that provide protection and control functionality to electrical systems.

About the job:

Embedded Platform Development:
Lead the design, development, and qualification of embedded firmware for safety-critical components and systems using 32-bit ARM microcontrollers

Firmware Architecture:
Establish robust firmware architectures for both bare-metal and RTOS-based (FreeRTOS or equivalent) platforms

Testing & Validation:
Develop and execute unit-level and system-level tests; collaborate with QA engineers to build automated, reliable test suites

Cross-functional Collaboration:

Work closely with hardware engineers, software engineers, and other stakeholders to ensure seamless integration of firmware into the overall product architecture

Documentation:
Generate comprehensive design documentation, including specifications, test plans, and reports, to facilitate communication and knowledge transfer within the team Regulatory Compliance:
Ensure firmware designs comply with relevant industry standards, certifications, and regulatory requirements

Source Control and Versioning:
Utilize git tools for continuous integration of source code updates

About you:

Bachelor’s or master’s degree in Electrical Engineering, Computer Science, Computer Engineering, Telecom Engineering or related field

Minimum 7 years of hands-on experience designing embedded firmware for 32-bit ARM architectures

Strong C/C++ proficiency in embedded environments

Proficiency in both bare-metal and RTOS-based development (FreeRTOS or equivalent)
Proficiency in Python or other scripting languages

Experience with communication protocols: SPI, I2C, UART, Modbus, CAN, Ethernet Hands-on experience with hardware bring-up and debugging tools (JTAG, oscilloscopes, logic analyzers)
High level of verbal and written communication skills in English language

Strong analytical skills and ability to communicate effectively with engineers, management, and customers

Capable of working independently and as part of a team in a fast-paced environment

Bonus Skills

Experience with embedded hardware design.

Familiarity with simulation applications.

Experience with safety-critical software processes (UL 1998, IEC 61508, etc.).Knowledge of UL/cUL/CE standards and certification processes.

Littelfuse strives to empower associate growth and development in a culture of ongoing collaboration and respect for diverse global perspectives and expertise. Our Core Values – Respect, Customer Focus, Agility, Collaboration – support us in our mission to improve the safety, reliability, and performance of our customers’ products that use electrical energy.

We are an equal opportunity employer that takes pride in giving every associate the means and courage to make a difference – everywhere, every day.

We offer a variety of benefits, including accident insurance, work from home, flexible working hours as well as development opportunities like internal Lean Six Sigma Certification.#LI-DB9

At Littelfuse, we support employee growth and development. Guided by our culture principles, our teams work together to deliver value for customers and make a positive impact in the communities where we operate. We are an equal opportunity employer committed to fostering an inclusive workplace where everyone has the opportunity to grow and contribute. We offer competitive compensation and benefits, performance-based incentives, flexible work arrangements, and development opportunities.
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