RF Filter Engineer - Contract

We are working with a leading RF/Microwave technology company at the forefront of innovation who is looking for a freelance RF Filter Engineer to support them with their ongoing projects.

The Role

• Outside IR35
• 6-12 month contract
• Hybrid work model with several UK locations

• Design, simulate, and optimise microstrip and waveguide filters, including bandpass, low-pass, high-pass, and notch filters.
• Perform full-wave electromagnetic simulations using tools such as HFSS, CST, ADS, or equivalent.
• Develop and validate filter designs through prototyping, tuning, and testing in a lab environment.
• Work with mechanical and manufacturing teams to ensure design for manufacturability (DFM) and performance integrity.
• Perform tolerance analysis, material selection, and thermal stability assessments to meet aerospace requirements.
• Support RF system integration, ensuring filters meet performance specifications in real-world conditions.
• Prepare detailed technical reports, design documentation, and presentations for internal and external stakeholders.

• Degree (or higher) in Electrical Engineering, RF/Microwave Engineering, or related discipline.
• Proven experience in RF/microwave filter design, specifically microstrip and waveguide structures.
• Strong proficiency in electromagnetic simulation tools (HFSS, CST, ADS, or similar).
• Hands-on experience with RF test equipment (VNA, spectrum analysers, network analysers).
• Understanding of aerospace EMC/EMI requirements and environmental considerations.
• Experience in material selection for high-frequency applications, including ceramics, PCB substrates, and metal waveguides.
• Strong problem-solving skills with the ability to work independently and within a multi-disciplinary team.