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.
As a Functional Test Engineer (Experience in Debug), you will play a critical role in ensuring our products meet all architectural specifications and functional requirements. You will be responsible for creating validation environments, executing complex system-level test plans, and performing deep root-cause analysis on failures across hardware and software domains. You will work closely with design, architecture, firmware, and software teams to isolate defects, validate fixes, and ensure high-quality products are delivered to market.
About Your Job:
Executes functional validation plans and test suites at system and subsystem levels under a variety of operating conditions.
Acts as the first line of defense for system failures by isolating, reproducing, and debugging complex functional, performance, and power-related issues.
Performs deep-dive root cause analysis to determine whether failures originate from hardware, software, firmware, or test environment issues.
Develops and maintains automation scripts and tools (Python, LabView, etc.) to streamline test execution, data collection, and CI flows.
Collaborates cross-functionally with Hardware/ASIC Design, Firmware, Architecture, and Software teams to communicate findings, propose workarounds, and verify fixes.
Documents debug methodologies, maintains detailed bug tracking records, and provides regular status updates to project stakeholders.
Execute and triage complex system-level validation scenarios, including performance, power, and functional coverage.
Drive ownership of failure analysis from symptom to resolution, identifying cross-domain interactions.
Build and optimize validation tools, scripts, and infrastructure to improve efficiency and repeatability.
Utilize lab equipment (oscilloscopes, logic analyzers, protocol analyzers, JTAG, PLC, DAC cards) and software debuggers (GDB, logging, tracing tools) as required.
Partner closely with engineering teams to accelerate issue resolution and ensure design robustness.
Maintain clear, structured documentation of bugs, test coverage, and debug processes using Jira, Git, or similar systems.
About You:
10+ years of experience in system validation, functional testing, ASIC/SoC debug, or related engineering roles.
Strong understanding of computer architecture, microprocessors, memory subsystems (DDR, PCIe), and communication protocols (I2C, SPI, UART, USB).
Proficiency in scripting and automation languages such as Python, LabView, or Ladder Logic.
Working knowledge of C/C++ for firmware or driver-level debugging.
Experience with version control and bug tracking tools (Git, Jira, Bugzilla, or equivalent).
Exceptional analytical and problem-solving skills with a structured, investigative mindset.
Strong communication skills, able to explain complex technical issues to both technical and non-technical audiences.
Resilient, detail-oriented, and persistent in highly iterative debug environments.
Bachelor’s or Master’s degree in Electrical Engineering, Computer Engineering, Computer Science, or a related field (or equivalent experience).
Hands-on experience with ASIC or SoC bring-up and post-silicon validation.
Exposure to CI pipelines and automated validation frameworks.
Experience working in highly cross-functional, global engineering teams.
Strong documentation skills and ability to create repeatable debug playbooks.
Littelfuse is an equal opportunity employer committed to empowering every associate to make a difference — everywhere, every day.
#LI-KRL
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.
Skills Required
- 10+ years of experience in system validation, functional testing, ASIC/SoC debug
- Bachelor's or Master's degree in Electrical Engineering, Computer Engineering, Computer Science or related field
- Strong understanding of computer architecture and communication protocols
- Proficiency in scripting and automation languages such as Python and LabView
- Working knowledge of C/C++ for firmware or driver level debugging
Littelfuse Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Littelfuse and has not been reviewed or approved by Littelfuse.
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Retirement Support — A 401(k) plan includes a company match with an additional annual contribution, with plan details also referenced in corporate filings. This structure indicates dependable retirement support across U.S. roles.
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Wellbeing & Lifestyle Benefits — A Lifestyle Spending Account and tuition reimbursement, plus wellness resources and an Employee Assistance Program, expand the package beyond core insurance. Development programs such as Lean Six Sigma certifications reinforce a holistic rewards mix.
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Healthcare Strength — Core medical, dental, and vision coverage are standard and described as solid and workable. Coverage breadth is supported globally with EAP access.
Littelfuse Insights
What We Do
Littelfuse is an industrial technology manufacturing company empowering a sustainable, connected, and safer world. Across more than 15 countries, and with 17,000 global associates, we partner with customers to design and deliver innovative, reliable solutions. Serving over 100,000 end customers, our products are found in a variety of industrial, transportation, and electronics end markets—everywhere, every day. Headquartered in Chicago, Illinois, United States, Littelfuse was founded in 1927. View our broad and deep product portfolio: https://www.littelfuse.com/ Littelfuse has had a long-standing commitment to ensuring a diversified workforce through equal employment opportunities. Maintaining a diversified workforce is critical to the success of our organization. Each associate receives equal employment opportunity regardless of race, color, religion, creed, sex (with or without sexual conduct), marital status, national origin, citizenship, ancestry, age, physical or mental disability, medical condition, order of protection status, military status, sexual orientation, gender expression or identity, genetic information, unfavorable discharge from military service, and any other protected class under federal, state or local law
