Our client, a leading organisation in the Defence & Security sector, is currently seeking a talented RF Design Engineer to join their Hampshire-based team and work on cutting-edge electronics that protect what matters most. Key Responsibilities: Design and develop RF and analogue circuits and systems from concept to implementation Conduct hands-on testing, troubleshooting, and performance optimisation Participate in design reviews and provide expert technical input Prepare high-quality technical documentation and reports Mentor junior engineers and provide guidance across projects Collaborate with project teams and stakeholders to deliver solutions on time and to specification Job Requirements: Bachelor's or Master's degree in Electronics Engineering (or equivalent) Proven experience in RF design engineering and circuit layout tools (e.g., Microwave Office, Altium) Experience designing solutions for low SWaP-C, harsh environments, and high-frequency applications (LF up to X Band) Familiarity with LNA, receiver design, high-power amplifiers, and radiation hazard analysis Strong problem-solving skills, technical leadership, and excellent communication Benefits: Be part of a stimulating, collaborative, and purpose-driven team Work on challenging projects with real impact on national security and defence Enjoy a competitive salary with flexible benefits covering health, wellbeing, savings, and lifestyle Thrive in a supportive, inclusive, and innovative environment that values your ideas Security requirements: Must be a British Citizen with eligibility to achieve SC and DV clearance Residency in the UK for at least 5 years (SC) and 10 years (DV) If you're ready to apply your RF expertise to projects that really matter, in a role that offers autonomy, challenge, and growth, we want to hear from you. Apply now to join our client's dynamic and talented team in Southampton