Quantum Physicist (Quantum Computing)
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Before you apply
Salary$135k – $170k
LocationChicago, Illinois, United States
Work modeon-site
Typefull-time
SeniorityMid
Experience4+ yrs
DepartmentQuantum Computing
EquityIncluded
Company size201–500 people
PostedOct 16, 2026 · 2w ago
Verified live1d ago
At a glanceSummarised by Seekless from the posting.
PhD in atomic, optical, AMO, quantum physics, or a related field, or at least four years of comparable research or professional experience
Hands-on experience conducting experiments involving atomic, optical, quantum, or precision-measurement systems
Experience applying quantitative atomic or optical physics models to experimental design or to the specification of laser, optical, RF, or control systems
Hands-on experience with lasers and optical systems, together with related technologies such as acousto-optic or electro-optic modulators, RF instrumentation, imaging systems, or ultra-high-vacuum equipment
Experience using Python for experiment control, data analysis, automation, or hardware integration
Evidence of designing and analyzing physics experiments or developing an experimental subsystem
Experience with neutral atoms, trapped ions, Rydberg physics, optical tweezers, quantum-gate protocols, or another coherent-control platform
Experience with high-power or short-wavelength lasers and optical power-delivery systems
Experience characterizing or mitigating laser-frequency, phase, pointing, or intensity noise
Experience with analog electronics, RF systems, or feedback control
Experience with high-numerical-aperture imaging, beam shaping, or optical projection
Experience integrating optical, electronic, vacuum, control, and software subsystems
Familiarity with Linux, Git, command-line tools, and collaborative software-development practices
This position may require access to information protected under U.S. export control laws and regulations for quantum computing technology. Please note that any offer for employment may be conditioned on authorization to receive software or technology controlled under these U.S. export control laws and regulations without sponsorship for an export license.
Skills
Python
Linux
Git
Benefits
Health insurance
Dental insurance
Vision insurance
Short term disability
Long term disability
Health savings account
Unlimited PTO
401(k)
Life insurance
Accidental death and dismemberment insurance
Flexible savings account
Paid family leave
Paid maternity leave
Paid paternity leave
Employee assistance program
Student loan repayment
Equity program
About the company
Infleqtion is on a mission to commercialize atom-based quantum technologies that deliver orders-of-magnitude improvements in sensing and computing applications. As a deep-tech startup, we embrace a results-driven, fast-paced, and customer-focused approach to innovation. We are seeking self-motivated, energetic individuals with exceptional problem-solving and technical skills to help drive our Quantum Computing mission forward. We encourage applications from experimental physicists with expertise in Atomic, Molecular, and Optical (AMO) physics, particularly those with experience in the coherent control of quantum systems such as ultracold atoms, trapped ions, and diamond NV centers.
Responsibilities
Role and Responsibilities
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Design, build, calibrate, operate, and improve neutral-atom quantum computing systems and subsystems.
•
Execute R&D projects involving quantum processor hardware, quantum-gate protocols, laser and optical systems, calibration, control, or system integration.
•
Translate defined technical goals into experimental plans, subsystem requirements, and measurable performance targets.
•
Design and analyze experiments and physics-based models to understand system behavior and guide technical decisions.
•
Independently execute well-defined technical work from planning through implementation and validation.
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Develop Python-based tools for experiment control, data analysis, calibration, automation, and hardware integration.
•
Own assigned subsystems through testing, troubleshooting, maintenance, documentation, and routine operation.
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Collaborate with physics, software, electrical, mechanical, and systems-engineering teams.
•
Provide technical guidance to junior team members and supervise interns as appropriate.
Requirements
•
PhD in atomic, optical, AMO, quantum physics, or a related field, or at least four years of comparable research or professional experience.
•
Hands-on experience conducting experiments involving atomic, optical, quantum, or precision-measurement systems.
•
Experience applying quantitative atomic or optical physics models to experimental design or to the specification of laser, optical, RF, or control systems.
•
Hands-on experience with lasers and optical systems, together with related technologies such as acousto-optic or electro-optic modulators, RF instrumentation, imaging systems, or ultra-high-vacuum equipment.
•
Experience using Python for experiment control, data analysis, automation, or hardware integration.
•
Evidence of designing and analyzing physics experiments or developing an experimental subsystem.
Nice to have
It is a plus if you have:
•
Experience with neutral atoms, trapped ions, Rydberg physics, optical tweezers, quantum-gate protocols, or another coherent-control platform.
•
Experience with high-power or short-wavelength lasers and optical power-delivery systems.
•
Experience characterizing or mitigating laser-frequency, phase, pointing, or intensity noise.
•
Experience with analog electronics, RF systems, or feedback control.
•
Experience with high-numerical-aperture imaging, beam shaping, or optical projection.
•
Experience integrating optical, electronic, vacuum, control, and software subsystems.
•
Familiarity with Linux, Git, command-line tools, and collaborative software-development practices.
If you are overqualified for this role, consider applying to our senior-level role
Legal
Note
This position may require access to information protected under U.S. export control laws and regulations for quantum computing technology. Please note that any offer for employment may be conditioned on authorization to receive software or technology controlled under these U.S. export control laws and regulations without sponsorship for an export license.
WORKING CONDITIONS and PHYSICAL REQUIREMENTS
Work will normally be performed in an office and laboratory environment and around technical equipment including computers and lasers. We ask that candidates be 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.
TRAVEL
Up to 10% travel may be required.
NOTE: Infleqtion does not accept unsolicited resumes from agencies. Infleqtion is not responsible for any fees related to unsolicited resumes.
Benefits
•
Salary Range: per year 135,000 - 170,000
•
100% company-paid medical, dental, vision, short/long-term disability
•
Employer-funded Health Savings Account
•
Unlimited PTO
•
401(k) match
•
Company-paid Life and AD&D Insurance
•
Flexible Savings Account
•
Paid FMLA, Maternity/Paternity Leave
•
Employee Assistance Program
•
Student Loan Repayment
•
Equity Program
Notice to Recruitment Agencies:
Infleqtion does not accept unsolicited resumes from agencies. Infleqtion is not responsible for any fees related to unsolicited resumes.