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. We are seeking an Electrical / Electronics Engineer to support the design, development, and testing of advanced electronic systems from concept through production. As part of the R&D development team based in Cádiz, Spain, you will contribute to the development of electronic protection and safety products, with a focus on Residual Current Devices (RCDs), ground-fault detection devices, and related protective solutions used in low-voltage electrical systems. This role is ideal for an engineer with early professional experience who is eager to grow technically while working closely with senior engineers and a multidisciplinary team. You will gain hands-on exposure across the full product development lifecycle, from concept through validation and certification. About the job: Electronics Design & Development Support the design, development, modification, and evaluation of electronic circuits and subsystems under the guidance of senior engineers Assist with schematic capture, circuit analysis, and simulation activities PCB & Components Support PCB design activities, including layout reviews and basic signal integrity, power, and thermal considerations Assist with component evaluation and selection based on performance, availability, and cost Testing & Validation Participate in prototype builds, testing, troubleshooting, and analysis of test results Support validation activities to ensure product performance and reliability Collaboration Work closely with electrical, firmware, mechanical, and test engineering teams to support system-level integration Documentation & Compliance Contribute to technical documentation (schematics, test reports, design notes) Support compliance with applicable standards and certification requirements (IEC, CENELEC, UL, etc.) About you: Bachelor’s degree in Electrical Engineering, Electronics Engineering, Telecommunications, or a related field Minimum 3 years of experience in electronics design or development Solid understanding of analog and digital electronics fundamentals
Experience
with schematic capture and PCB design tools (e.g., Altium or equivalent) Familiarity with mixed-signal design concepts Good communication skills in English
Preferred Qualifications
Familiarity with low-voltage electrical protection standards (IEC, CENELEC, UL, etc.) Exposure to circuit protection technologies and methods Basic understanding of embedded hardware design and collaboration with firmware teams
Experience
with simulation tools and analysis applications Basic scripting knowledge (e.g., Python) for test or analysis support Awareness of CE marking and certification processes #LI-EW1 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. Our humble roots date back to 1927, where, in the back of a garage on Chicago’s northside, our founder, Edward Sundt, developed a small, fast-acting, protective fuse for use in sensitive test meters. Sundt wanted to call his new company producing these small fuses, “Little Fuse,” but wasn’t allowed to trademark two such common words. So, instead he went with the one-word, misspelled “Littelfuse.” For more than 95 years, Littelfuse has pioneered innovative products that help empower a sustainable, connected, and safer world. With the ever-evolving electrification and electronification of customer applications, our product technologies are closely linked to sustainable applications such as electric vehicles and EV charging infrastructure, renewable energy and energy storage, factory automation, power management and more. Throughout our history, our people have been the foundation of our success — and that remains true today. Now more than ever, our bright and talented people are a strategic advantage for the company. From the production line to the engineering lab, the office or distribution center, Littelfuse people are an important part of a diverse, talented team of the best and brightest in the industry. While Littelfuse has experienced tremendous growth in recent years, we still maintain a small-company, entrepreneurial approach where your efforts will drive our culture, our business, and the overall success of the organization. No matter where you work or what you do, your contributions will make a difference at Littelfuse — everywhere, every day. Littelfuse is an Equal Opportunity/Affirmative Action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, gender identity, sexual orientation, disability, protected veteran status, and/or any other protected class under federal, state, or local law.