Senior Electrical/Electronic Engineer

• Bachelor's degree (or higher) in Electrical Engineering, Electronics Engineering, Telecommunications, or a related field

• Minimum 7 years of experience in electronics design and development

• Strong foundation in analog and digital electronics

• Proficiency with schematic capture and PCB layout tools (Altium preferred)

• Experience with mixed-signal design

• Strong communication skills in English, with experience working in international environments

• Experience with RCD technologies (Type A, Type B)

• Exposure to Arc Fault Detection (AFD / AFDD) technologies

• Experience in embedded hardware design and collaboration with firmware teams

• Familiarity with simulation tools and analysis applications

• Knowledge of Python or other scripting languages for testing or data analysis

• Understanding of certification and compliance processes (CE marking, IEC, UL, etc.)

• Experience in pure analog circuit design and testing

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.

We are looking for an experienced Senior Electronics Engineer to lead the design, development, testing, and support of advanced electronic systems from concept through to production. Based in Cádiz, Spain, you will be part of the R&D development team, working on electronic protection and safety products, with a strong focus on Residual Current Devices (RCDs), ground-fault detection devices, and related protective functions used in low-voltage electrical systems. This role offers the opportunity to contribute across the full product lifecycle-from concept and design through prototyping, validation, certification, and production support-while collaborating with multidisciplinary engineering teams.

• Design, develop, modify, and evaluate electronic systems and subsystems for protection and safety products

• Define design approaches, architectures, and key parameters to meet performance and compliance requirements

• Create detailed schematics, perform circuit analysis, and run simulations to validate designs

• Apply strong expertise in both analog and mixed-signal circuit design

• Lead and/or oversee PCB design activities, including signal integrity, power distribution, and thermal considerations

• Evaluate and select electronic components based on performance, reliability, availability, and cost

• Plan and execute prototype testing, analyze results, troubleshoot issues, and iterate designs

• Ensure designs meet performance, reliability, and safety standards

• Work closely with firmware, mechanical, and test engineers to ensure seamless system integration

• Develop and maintain technical documentation, including design specifications, test plans, and reports

• Ensure compliance with applicable standards and certification requirements (IEC, CE, UL, etc.)