Systems Integration Engineer - Compute

Quantum Computing Jobs UK; Kidlington; Hybrid; GBP 60,000 - 90,000; Full time

Job summary

Infleqtion, a global quantum technology company, is expanding its UK team in Kidlington, Oxford. The Instrumentation Software Engineer will develop software/firmware interfaces to control optical and atomic physics systems for next‑gen clocks and PNT devices, working across RF, analogue, digital and optical domains.

You will integrate diverse subsystems, perform system bring-up and debugging, and collaborate with multidisciplinary teams to ensure end-to-end integration and reliable operation in

Qualifications

• Experience developing software/firmware interfaces for instrumentation
• Ability to integrate RF, analogue, digital, optical, and mechanical subsystems
• Experience with system bring-up, fault isolation, and test plans

Responsibilities

• Develop software/firmware interfaces for optical/atomic physics systems
• Integrate devices and subsystems into complex systems
• Define and execute integration, verification and validation test plans
• Diagnose system-level performance and integration issues
• Collaborate with electronics, FPGA, software, mechanical, optics and physics teams
• Support installation, deployment, and maintenance in labs and operations environments
• Contribute to risk management and continuous improvement

Skills

Instrumentation

Software engineering

Embedded systems

RF/analog/digital interface

Systems integration

FPGA/firmware

Lab testing

Cross-functional teamwork

Education

Bachelor's or Master's in Engineering/Physics

Tools

Lab measurement equipment

Circuit design tools

Job description

Job Type Permanent

Work Location Hybrid

Posted 5 Oct 2026 (4 days ago)

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Job Type Permanent

Work Location Hybrid

Posted 5 Oct 2026 (4 days ago)

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Share

Save job

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Infleqtion is a global quantum technology company solving the world’s most challenging problems. The company harnesses quantum mechanics to build and integrate quantum computers, sensors, and networks. From fundamental physics to leading edge commercial products, Infleqtion enables “quantum everywhere” through our ecosystem of devices and platforms.

LOCATION

Infleqtion has offices in the USA, United Kingdom and Australia. This is a permanent, full-time position at our Kidlington, Oxford office. Our flexible working policy enables all full-time employees to work from home up to 2 days a week, if work permits.

Position Summary

As part of our strategy for growth in the UK, we are expanding our Engineering Team and recruiting an Instrumentation Software Engineer. In this role you will develop software and firmware interfaces to control and monitor optical and atomic physics systems for the development of next generation atomic clocks and PNT systems. These systems offer orders of magnitude improvements in sensing and accuracy compared to current technologies.

Job Responsibilities

Technical Responsibilities

• Integrate electronics devices, instruments, third-party devices, and subsystems into larger complex systems comprising RF, analogue, digital, optical, and mechanical elements.
• Translate system-level requirements into practical integration architectures, interfaces, cabling, power, communications, and control schemes.
• Develop system interconnects including cable assemblies, harnesses, RF connections, grounding, shielding, power distribution, and signal routing.
• Perform system bring-up, commissioning, troubleshooting, fault isolation, and performance optimisation.
• Identify and resolve integration issues including grounding, EMI/EMC, signal integrity, timing, communications, power distribution, and environmental effects.
• Develop and maintain system diagrams, interface control documentation, wiring diagrams, integration procedures, and configuration records.
• Define and execute integration, verification, and validation test plans at subsystem and system level.
• Use laboratory test and measurement equipment to diagnose system-level performance and integration problems.
• Support installation, deployment, commissioning, and maintenance of systems in laboratory and operational environments.
• Work closely with electronics, software, FPGA, mechanical, optical, physics, and systems engineering teams to ensure successful end-to-end integration.
• Support supplier selection and integration of third-party equipment and externally developed subsystems.
• Contribute to system risk management, failure analysis, reliability improvement, and continuous improvement activities.
  
  

Personal And Team Responsibilities

• Collaborate effectively with team members to ensure deadlines are met
• Work within multi-disciplinary teams including physicists, engineers, and technicians to develop solutions
• Adapt to changing circumstances and manage ambiguity effectively