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Senior Electronics & Systems Engineer

Oni
Oxford (On-site), UKfull_timePosted 14 Sept 2026

About the role

Join ONI and Explore the Boundaries of Scientific Discovery!   At ONI, we are driven by a profound mission: to propel scientific discovery and combat diseases by granting everyone the ability to visualize, comprehend, and share the intricate microscopic details of life. Our revolutionary Nanoimager and Aplo Scope stand at the forefront of advancing cellular studies on a molecular level, making substantial contributions to the evolution of scientific knowledge. We are actively seeking an enthusiastic and self-motivated Senior Electronics & Systems Engineer to join our pioneering team located in Oxford. We believe in the power of relentless curiosity and the pursuit of excellence, and we invite you to join us in shaping the future of scientific exploration and healthcare breakthroughs. In this role you will be the go-to technical resource for electronics design, working closely with engineering, software and R&D product teams. Electronics design is at the core of the role, but we are looking for someone who enjoys working beyond the boundaries of the PCB - developing embedded firmware, integrating sensors and actuators, and understanding how electronics interact with optics, mechanics, software and the physical world. You will have significant technical ownership across the product lifecycle, from circuit and system design through prototyping, bring-up, verification and production. You will also develop production firmware and work further up the software stack where needed to integrate, automate and test the systems you develop. The role is ideal for an engineer who enjoys solving complex multidisciplinary problems, takes ownership of product outcomes and thrives in a collaborative, fast-paced environment. Your role at ONI: Own electronics designs from concept through architecture, schematic design, PCB development, bring-up, verification and production. Design robust analogue and digital electronics, including power supplies, signal conditioning, sensor interfaces, communications and control electronics. Make appropriate component and architecture choices, balancing performance, cost, availability, manufacturability and product requirements. Undertake PCB design and layout as an integral part of electronics development, working with external PCB designers where appropriate, and considering signal integrity, grounding, noise, EMC/ESD, thermal performance and DFM/DFT. Work with manufacturing partners and suppliers to ensure designs are manufacturable, testable and robust through production. Bring up new hardware and systematically debug complex problems using oscilloscopes, logic analysers, hardware debuggers and other laboratory instrumentation. Develop and maintain production embedded firmware, typically for microcontrollers, alongside low-level firmware for hardware bring-up, control, test and diagnostics. Develop and debug interfaces to sensors, actuators and other hardware, including analogue front ends, ADCs/DACs and common digit

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Oni

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