Senior Radio Frequency Engineer (m/f/d)

Molex; Cumbernauld; On-site; GBP 50,000 - 70,000; Full time

Job summary

Molex is looking for a Senior RF Engineer to join their Engineering team in Cumbernauld, UK. In this role, you will lead the development of advanced RF circuits for diverse applications, conduct simulations, and ensure designs meet high-performance standards. Candidates should have at least 5 years of RF design experience and proficiency in tools like Keysight ADS and Altium Designer. The position is based onsite at the UK Headquarters. A valid work permit for the UK is required.

Qualifications

• Minimum of 5 years of hands-on experience in RF design, simulation, and testing.
• Expert-level proficiency with Keysight ADS, Ansys HFSS and SIwave simulation tools.
• Proven track record of delivering high-performance RF designs from concept through production.
• Deep understanding of RF principles including impedance matching, filter design, and electromagnetic compatibility.

Responsibilities

• Lead the design and development of advanced RF circuits and subsystems.
• Perform detailed simulations using ADS, HFSS, and SPICE.
• Translate designs into manufacturable layouts using Altium Designer.
• Conduct rigorous bench testing and validation of prototypes.
• Work cross-functionally with mechanical and digital teams.

Skills

RF design

Simulation

Testing

Problem solving

Collaboration

Tools

Keysight ADS

Ansys HFSS

Altium Designer

Job description

The Electronic Systems business unit is a segment of Molex's Aerospace & Defense Solutions division. With primary locations in California, New Hampshire, Pennsylvania USA and Cumbernauld UK, we design and manufacture high performance mission critical electronics:

• Rugged power supply and computing systems in VITA VPX and VNX+ form factors
• RF and Satcom: ADC/DAC digital direct sampling and processing systems
• FPGA accelerated computing platforms featuring AMD and Altera devices in PCIe form factors
• Microelectronics: Custom ruggedised and miniaturised assemblies

We are currently looking for a Senior RF Engineer to join our Engineering team based onsite at our UK Headquarters in Cumbernauld.

What You Will Do

As a Senior RF Design Engineer, you’ll be the technical cornerstone of our RF product development. Your designs will not only meet exacting performance standards but also push the boundaries of what’s possible in high-frequency systems. You’ll guide projects from concept to production, ensuring that every circuit, simulation, and test delivers excellence.

• Lead the design and development of advanced RF circuits, subsystems, and modules for applications ranging from wireless communications to radar.
• Perform detailed simulations using ADS, HFSS, and SPICE to optimize performance, minimize losses, and ensure compliance with specifications.
• Translate designs into manufacturable layouts using Altium Designer, collaborating closely with PCB layout engineers to meet RF performance goals.
• Conduct rigorous bench testing, validation, and troubleshooting of prototypes, using state-of-the-art RF test equipment.
• Work cross-functionally with mechanical, digital, and manufacturing teams to ensure seamless integration of RF designs into complete systems.

Who You Are (Basic Qualifications)

• A minimum of 5 years of hands‑on experience in RF design, simulation, and testing.
• Expert‑level proficiency with Keysight ADS, Ansys HFSS and SIwave simulation tools.
• Proven track record of delivering high‑performance RF designs from concept through production.
• Deep understanding of RF principles, including impedance matching, filter design, and electromagnetic compatibility.
• Strong problem‑solving skills and the ability to work independently on complex technical challenges.

What Will Put You Ahead

• Strong working knowledge of Altium Designer for PCB layout and RF board design.
• Experience of AMD RFSoC or Altera FPGA devices and tools.
• Mil‑Spec design practices and compliance (VPX, VNX+ etc)
• Detailed understanding of latest ADC, DAC and clock circuitry from leading suppliers such as TI and ADI

Please note that we are unable to consider applications from anyone who does not have a valid work permit to work in the UK.