We have an exciting opportunity for a Senior RF Design Engineer to join a leading engineering company specialising in RF technology for defence, aviation, and secure communications. This role offers a salary of £60,000 - £65,000 and involves working across the full product lifecycle in a fast-paced, innovative environment. Key Responsibilities: RF system architecture, simulation, and circuit design. PCB layout, schematic capture (Altium), and RF component selection. Design of RF amplifiers (up to 200W), filters, transmitters, and receivers. Hands-on testing, troubleshooting, and production support. Leading design reviews and mentoring junior engineers. Required Experience & Skills: 5 years in RF design, ideally within defence or aerospace. Proficiency in RF simulation tools, PCB design software, and test equipment (e.g., oscilloscopes, network analysers). Expertise in RF power amplifiers (GaN, LDMOS), antenna design, and EMC considerations. Strong analogue and digital electronics knowledge. Preferred Qualifications: 7 years in RF engineering. Familiarity with MIL-STD and DO-160 compliance. Experience with Altium Designer, Cadence AWR Microwave Office, and AnsysHFSS. This is a fantastic opportunity to work on cutting-edge technology in a collaborative, high-impact environment. Hybrid working available (3 days onsite, 2 days WFH).