Role: Senior RF Design Engineer Location: Hertfordshire, Hybrid Salary: Up to £65,000 depending on experience bonus benefits About the Role Our client is looking for a hands on RF Design Engineer to research, design, and test advanced radio-frequency technology for integration into complex defence systems. You will work on cutting-edge RF circuits, prototypes, and modifications, ensuring designs perform reliably in challenging environments. This role offers a blend of practical laboratory work and technical design, giving you the opportunity to see your designs through from concept to testing. Key Responsibilities * Design, prototype, and test RF circuits across a wide frequency range (30 MHz – 30 GHz) * Work on components such as LNAs, HPAs, filters, oscillators, synthesizers, and modulators * Conduct design proving tests and trials in the laboratory * Apply knowledge of EMC, vibration, and thermal considerations for harsh environments * Use RF design software (e.g., Microwave Office) for circuit layout and analysis * Support design for manufacture and test, liaising with production teams * Document and present results, issues, and solutions to internal teams and customers Experience & Skills Required * Strong practical RF design experience at the component and circuit level * Hands-on lab skills: soldering, fault-finding, use of spectrum analyzers, VNAs, power meters * Good knowledge of analogue, digital, and power supply design * Experience designing RF for harsh environments * Skilled in RF simulation and layout tools (Microwave Office or equivalent) * Excellent communication and report-writing skills * Team player with initiative and a passion for electronics Benefits * Company bonus * Pension * Flexible working & leave * Enhanced parental leave and healthcare benefits * Excellent site facilities Security: Candidates must hold British Citizenship due to security vetting requirements