Senior AMO Physicist - Quantum RF

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.

Full‑time position based at our Kidlington, Oxford office. Work from home is permitted up to two days per week based on business needs and manager approval.

As part of our strategy for growth in the UK, we are expanding our physics team and recruiting an experimental AMO physicist to join our quantum RF team. In this role, you will actively contribute to ongoing research & development projects and assist in the exploration of new concepts and approaches for future quantum RF sensor systems. Working closely with a team of physicists and engineers, you will play a vital role in the collaborative efforts of the team.

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• Translate product requirements into atomic system designs.
  
• Execute modelling, simulation, and analytical calculations to design systems required to meet product performance.
  
• Design and execute testing and verification plans.
  
• Integrate complex opto‑mechanical systems, electronics, and software into quantum devices.
  
• Perform technical tasks needed for the success of the project from equipment setup to system demonstration.
  
• Identify materials and components to meet project requirements.
  
• Document project progress and identify, track and resolve any project issues.
  

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• Work collaboratively with team members against tight deadlines.
  
• Ability to work with multi‑disciplinary teams to develop commercial and non‑commercial products and/or draft new quantum‑led projects.
  
• Comfortable working in a fast‑paced, evolving environment where priorities may shift based on project needs and technological advancements.
  
• Open to learning new techniques, integrating feedback, and collaborating with multidisciplinary teams to navigate ambiguity effectively.
  
• Ability to assess complex situations, adapt quickly, and make informed decisions under uncertainty.
  

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• Contribute to external reports and publications, author/co‑author papers, proposals, presentations and reports, give invited talks, attend project workshops and conferences.
  
• Explain and present complex quantum systems to internal and external stakeholders with a wide range of technical and non‑technical backgrounds.
  

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• Entrepreneurial drive, intellectual agility and personal eagerness to develop with the needs of the business.
  
• Good verbal and written communication skills, able to effectively share information with technical and non‑technical staff, both in writing and orally.
  
• Good collaboration skills, able to work in a team environment where engagement and participation are an expected part of successful job performance.
  

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• PhD in experimental atomic, molecular, and optical (AMO) physics.
  
• Rydberg physics and their interactions, particularly when applied to Rydberg‑atom electrometry.
  
• Working knowledge of control systems and signal processing.
  
• Proficiency in a programming language (e.g. Python, Rust, C++).
  
• Ability to problem‑solve and debug complex systems comprised of optics, analogue and digital electronics, software and quantum devices.
  

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• Experience working with laser systems; optical design, alignment, and control.
  
• Demonstrable laboratory experience with atomic and molecular physics experiments.
  
• Proven track record of integrating complex hardware and software into systems.
  
• Familiarity with mechanical, optical, and electronic design packages (e.g. Solidworks, Zemax, Altium).
  
• Prior experience in project management is a plus.
  
• Understanding of Health, Safety, and Environment (HSE) practices and modeling workplace safety culture.
  

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 15 kg 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.

Up to 10% travel may be required.

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.

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• Competitive salary
  
• Unlimited PTO
  
• Generous company 10% pension contribution regardless of employee contribution
  
• Cycle to workscheme
  
• Tax‑efficient technology schemes
  
• Incentive Stock Option Plan
  
• BUPA Private Healthcare Insurance once probationary period is successfully completed
  

If you're excited about this role but don't meet every requirement, we'd still love to hear from you! Apply, and we'll be in touch. If you need assistance or accommodation, please feel free to contact us at UK‑