We are on the lookout for a Senior Hardware Engineer with proven ATEX product design experience.
26th February 2026
The Baseband Hardware Team is involved in the whole product lifecycle from initial specification of critical subsystems, through detailed design and testing of the finished product.
Join Sepura Ltd at an exciting time of growth and progress your career within this innovative technology company, based in Waterbeach, Cambridge.
Role
The role requires a self‑motivated individual who likes contributing to a team, can adapt to changing requirements, and effectively communicate progress with both design and verification of the platform. As a senior engineer you will take responsibility for delivering small product features or significant parts of larger features.
Day to Day
Our customer base includes many different industries and markets around the world. Our complete TETRA and LTE solutions are developed specifically for users in multiple sectors to face their critical communications challenges. There is no typical day here at Sepura.
You will be supported by your manager and team, and collaborate with other departments across the business.
Baseband Hardware Activities
* Designing intrinsic safety (IS) circuitry for ATEX‑certified products, including identifying infallible connection requirements, applying current‑limiting techniques for DC‑DC converters, and ensuring compliance with temperature‑classification and encapsulation standards. Diagnose non‑conformances and implement thermal‑management solutions such as heat‑sinking.
* Developing advanced microprocessor‑based systems, integrating a wide range of sensors such as accelerometers, magnetometers, proximity detectors, gyroscopes, and barometers to support mission‑critical functionality.
* Designing high‑efficiency, low‑power power‑supply architectures, ensuring robust performance across challenging operational environments.
* Creating and validating audio amplifier designs up to 10 W, optimising for clarity, efficiency, and reliability.
* Conducting design verification and system‑level testing, including EMC validation, to ensure compliance with internal standards and external regulatory requirements.
* Producing high‑quality engineering documentation, including functional specifications, detailed design descriptions, and supporting artefacts for modules and complete product assemblies.
Qualifications
* A bachelor’s degree in a relevant engineering discipline, or equivalent industry experience demonstrating strong technical capability.
Experience and Skills
* Proven experience developing products for ATEX‑certified environments, with a solid understanding of intrinsic safety principles and compliance pathways.
* Strong written communication skills, with the ability to produce clear, accurate, and structured technical documentation.
* Expertise in microprocessor system design, including power‑supply requirements, low‑power architectures, and power‑saving strategies.
* Proficiency with key serial communication interfaces, including I²S, I²C, UART, and USB (USB 3.0 experience considered especially valuable).
Nice to Have
* Demonstrated success in designing for EMC and ESD robustness, from component selection through to system‑level mitigation.
* Experience integrating baseband and RF functional blocks, ensuring reliable performance across complex mixed‑signal architectures.
* Background in audio system design, particularly with low‑power audio amplifiers up to 10 W.
* Familiarity with embedded Linux environments, including driver integration, board bring‑up, or system‑level debugging.
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