Systems Engineer in Oxford

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.

This position is a full-time position based at our Oxford (UK) site.

Position Summary

Infleqtion is seeking a talented and experienced Systems Engineer to join our dynamic team, where you will play a pivotal role in transforming hardware prototypes into manufacturable and scalable products. You will collaborate closely with a diverse team of technical experts, hardware and software engineers, and physicists to ensure the seamless integration of complex systems, and within our product lifecycle process.

Key Responsibilities

• Lead systems engineering for quantum product development, including system-level design and requirements capture.
• Develop and maintain core systems engineering and interface documentation (e.g., Product Requirement Documents, System Requirement Documents, Interface Control Documents etc.) and ensure full traceability from requirements through to implementation and verification.
• Define and execute modelling, simulation, and analytical activities to support design, verification, validation, and lifecycle performance.
• Coordinate assembly, Integration & Test (AI&T) and Verification & Validation (V&V) planning, including processes, procedures, test strategies, and engineering support for execution with a multi-disciplinary team.
• Collaborate with physicists, engineers, and product teams to support development of system architectures.
• Identify, assess, and mitigate technical risks, assumptions, and dependencies; support reliability analysis.
• Contribute to and promote best practices, tools, and continuous improvement in systems engineering across programmes.

Qualifications

• Masters or PhD in Systems Engineering, Electrical Engineering, Physics, or a related field or equivalent industry experience.
• Significant experience in systems engineering (ideally 10+ years) within complex, multidisciplinary, high-tech or hardware environments.
• Proven experience across the full system lifecycle, including requirements management, system architecture development, and verification & validation.
• Experience working with product lifecycle processes for R&D projects within deep and emerging technologies.
• Strong technical documentation skills.
• Experience working with cross‑functional teams (engineering, science, product, or commercial stakeholders).
• Experience with product lifecycle management and systems engineering frameworks such as UML, IEEE 15288, INCOSE, MSBE, SysML, IEEE 29148 etc.

Desired Skills

• Experience with complex, high-tech or deep‑tech systems combining mechanical, electrical, RF, optical, and software components.
• Excellent problem‑solving and analytical skills.
• Experience in quantum technologies, precision instrumentation, or optical systems.
• Exposure to AMO physics and quantum control systems.
• Experience in regulated or high‑reliability industries (e.g., aerospace, defence, medical devices).

Working Conditions and Physical Requirements

Work will normally be performed in an office and laboratory environment and around technical equipment including computers and lasers. Able to sit, stand, bend, lift and carry up to 40 pounds without assistance. Able to efficiently use automated office equipment such as laptops, copiers, and printers; able to effectively engage in communications (via phone, computer, or in-person). Any required Personal Protective Equipment will be provided and must be properly used in accordance with company requirements.

Total Rewards

• Competitive salary.
• Incentive Stock Option Plan.
• Generous company 10% pension contribution regardless of employee contribution.
• Unlimited PTO subject to fair usage.
• BUPA healthcare after probation period.
• Cycle to work and Technology scheme.

Travel

Up to 10% travel may be required.

Equal Opportunity

Regardless of your interest in the quantum industry, you can take pride in the fact that Infleqtion is building an ecosystem of quantum technologies and commercial products, driving the industry towards the future. Studies reveal that while men apply for jobs when they meet an average of 60% of the requirements, women and other groups tend to apply only when they meet all the criteria. If you believe you have the potential but don't meet every single point in our job advertisement, please don't hesitate to contact us! We would love to chat with you and see how you could bring great value to our team. Our goal is to find exceptional individuals who can enrich our team culture, actively contribute, and have a genuine passion for their work. Here you have freedom to embrace your whole self: who you love, your gender identity and expression, skin colour, age, appearance, disability, neurodiversity, DNA, military/veteran status, citizenship, and other factors that make up who you are. Your uniqueness is valued, welcomed, and appreciated here. We are dedicated to providing a positive workplace and base all employment decisions on your qualifications, performance, merits, as well as business needs. We are proud to be an Equal Employment Opportunity Employer.