RF Engineer

We are seeking a RF Engineer to play an important role within our Research and Development team. Sepura develops Mission Critical TETRA/LTE radios (sub‑6GHz), Cellular, BT, WiFi, GNSS, NFC and delivers the right solutions to customers worldwide, including police, fire, ambulance services, and critical mining and industrial customers. The company is a global leader in innovative communications solutions and is transitioning from TETRA to LTE ESN services.

The role offers an exciting opportunity to develop next‑generation communication devices at Sepura Ltd in Waterbeach, Cambridge.

• Component evaluation, and sourcing
• Support on design (down to discrete component level)
• Integration with Digital, Audio, and MMI subsystems
• Circuit simulation
• Test definition and documentation
• Validation of designs
• Root‑cause analysis of failures with updates to design to resolve faults
• Schematic creation and PCB layout supervision

This role may require some travel; the successful candidate will need a full, clean driving licence, their own car, and be able to travel overseas. Travel expenses will be covered.

As an RF Engineer you will be expected to verify designs, identify product issues and resolve complex engineering challenges with proactive presentation of solutions. You will also be involved in component selection and design with support from senior engineers as required.

• Bachelor’s or Master’s degree in Electronics Engineering, Telecommunications, or a related field

• Understanding of RF systems and technologies, including design, simulation, and testing
• Proven hands‑on design experience with practical engineering intuition
• Good problem‑solving and analytical abilities
• Radio product development/integration up to 6GHz, ideally within the telecommunications or critical communications industry
• Excellent time‑management and communication skills, with a history of delivering projects/tasks on time and with high quality

• RF Tx/Rx architectures
• RF receivers & transmitters
• RF power amplifiers
• Frequency generation (VCO)
• Matching networks
• EMC/EMI

• Component selection and evaluation skills
• Experience using RF simulation and modelling tools such as ADS, CST, or equivalent
• Familiarity with RF testing equipment, procedures, protocols, and facilities (e.g., anechoic chambers, screening rooms)

• TETRA/PMR – 100‑900 MHz
• LTE/4G/5G – Sub‑6GHz
• GSM – 800/900/1800 MHz

• Excellent communication and interpersonal skills, with the ability to collaborate effectively across teams
• Ability to manage multiple activities concurrently and organise support where needed
• Strong practical skills with PCBs, including component‑level rework and modifications

• GNSS – 1.0‑1.6 GHz
• WiFi – 2.4‑6 GHz
• NFC
• Discrete design experience
• Knowledge of MIMO/5G including validation testing