Senior Cryogenic Engineer

Job Description

Job Title: Senior Cryogenic Engineer. Location: Geneva, Switzerland

Responsibilities:

Cryogenic System Development

• Support and develop advanced cryogenic platforms for the SNSPD product line.

• Focus on next-generation rack-mountable cryogenic systems.

• Oversee the development lifecycle of cryogenic subsystems;

• Ensure reliable and robust 2K cryogenic systems.

• Make systems suitable for deployment in internal and customer environments.

• Ensure cryogenic platforms remain maintainable and adaptable as technology evolves.

System Integration and Testing

• Lead system-level specification of cryogenic platforms.

• Manage the integration and testing of cryogenic systems designed for SNSPD requirements.

• Work with internal engineering teams, subcontractors, and external partners.

• Design, configure, and improve deployable cryogenic systems;

• Provide operational support for existing platforms.

Qualifications:

• Master's degree in Applied Physics, Systems Engineering, Mechanical Engineering, or a related field.

• PhD preferred.

• At least 5–7 years of experience in the cryogenic industry.

• Proven experience designing, evaluating, and maintaining complex cryogenic systems.
• Hands-on experience with:
  • Dilution cryostats
  • Sorption cryostats
  • 1K cryostats

• Strong understanding of cryogenic wiring, sensors, and electronics.

• Experience with CAD-based design and manufacturing processes.

• Ability to work with cryogenic vendors, subcontractors, and external design partners.

• Experience integrating complex systems across multidisciplinary teams.

Preferred:

• Expertise in fibre optics or free-space optics.

• Experience with superconducting nanowire single-photon detectors (SNSPDs).

• Experience leading system integration projects.

Benefits:

IonQ offers:

• Competitive compensation.

• Equity plan.

• Medical, dental, and vision plans.

• Matching 401(k).

• Unlimited paid time off.

• Paid holidays.

• Parental and adoption leave.

• Legal insurance.

• Home technology stipend.

Details of participation in benefit plans will be provided when a candidate receives an offer.

Compensation:

Compensation will depend on the candidate's education, qualifications, experience, office location, market data, and internal team equity.

The job posting does not provide a specific salary range.

Application Instructions:

Apply through IonQ's official careers portal.

The application requires:

• First and last name.

• Preferred first name.

• Email address and phone number.

• Country and city of residence.

• Resume or CV.

• Answers about your education and cryogenic industry experience.

• Details of your experience with dilution, sorption, and 1K cryostats.

• English and French language proficiency.

• LinkedIn profile.

A cover letter and personal website are optional.

Applicants must also provide information about work authorization, visa sponsorship requirements, third-country national status, and specified citizenship or location details. Privacy notice and background check consent are also required.

Additional Information:

• The position is based in Geneva, Switzerland.

• IonQ is an equal opportunity employer committed to fair treatment and equal employment opportunities.

• Pre-employment screening may include identity, employment history, education, sanctions and watchlists, adverse media, public records, and criminal or court records where legally permitted;

• Candidate information may be processed internationally, including in the United States and Switzerland, with applicable data-transfer safeguards.

• Providing information and consent for background checks is voluntary, but failure to provide required information or consent may prevent employment from starting or continuing.