Quantum Physicist

Infleqtion

Quantum Physicist focusing on atom-based quantum technologies at Infleqtion. Designing, building and calibrating Quantum Computers as part of R&D projects.

Posted 7/13/2026full-timeBoulder • Colorado, Illinois, Wisconsin • 🇺🇸 United StatesMid-LevelSenior💰 $130,000 - $211,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in Quantum Computing, including the design and calibration of systems based on neutral atoms, and proficiency in Python for experimental software development. Strong ability to lead R&D projects, mentor team members, and effectively communicate complex concepts to diverse audiences.

Highest-signal resume keywords

PhD In Atomic PhysicsPython ProgrammingLaser System DesignQuantum Processing UnitsProblem Solving Skills

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Quantum ComputingMathematical ModelingAtomic PhysicsLaser CalibrationSystem TuningExperimental DesignData AnalysisOptical SystemsHigh Power Laser OperationAnalog Electronics

Soft Skills

Excellent Communication SkillsCollaboration SkillsAutonomous WorkMentoringFast Learning Rate

Tools & Technologies

LasersAcousto-Optic ModulesRF Signal GeneratorsUltra-High-Vacuum SystemsGitLinuxCommand Line Interface

Industry Keywords

Atomic PhysicsOptical PhysicsR&D ProjectsQuantum Gate ProtocolsAMO Physics

Tech Stack

Tools & technologies

LinuxPython

About the role

Key responsibilities & impact

Design, build, calibrate and maintain Quantum Computers based on neutral atoms.
Participate and/or lead Research and Development projects for laser systems, Quantum Processing Units, quantum gate protocols, etc. for Quantum Computers.
Create, test, and validate mathematical models of atomic physics behavior, and use the results to inform system design by translating high-level system requirements into specialized engineering subsystems.
Self-start and successfully execute on a new R&D activity given a well-defined goal and constraints (e.g. resources, timeframe): gather requirements from stakeholders, drive definition of solution space, drive project execution.
Develop, test, run, and debug software for conducting experiments and system tuning in production.
Design, assemble, and test laser and optical systems.
Ownership of subsystems to maintain high availability and high performance.
Mentor and teach junior team members as indirect reports. Supervise interns.

Requirements

What you’ll need

PhD in atomic physics, optical physics, or related field; or equivalent related professional experience (4+ years); If you have substantially more experience than this and are excited to apply, please do! We will also consider hiring at the **Senior Quantum Physicist **level.
Proficiency in using tools commonly found in an atomic physics lab, such as lasers, acousto-optic modules, RF signal generators and analyzers, and ultra-high-vacuum systems.
Proficiency in writing Python code for running physics experiments.
Proficiency in calculating atom-light interaction for input laser specifications.
Excellent verbal and written communication skills, ability to effectively share information with technical and non-technical staff at all levels of company hierarchy.
Excellent collaboration skills, ability to work in an agile efficient team environment where engagement, feedback, and participation are an expected part of successful job performance.
Demonstrated problem solving skills and fast learning rate.
Ability to work both autonomously—taking high-level goals as input to develop and execute an optimal plan while gathering necessary resources—and collaboratively, by soliciting and incorporating input from colleagues.
* It is a plus if you have:*
Experience in operating high power CW laser (> 1 Watt) and/or short-wavelength visible laser (< 500 nm) and designing their laser power delivery systems
Experience with characterization and mitigation of laser frequency and intensity noise
Experience with analog electronics and use of servo loops for laser and subsystem stabilization
Experience with image projection through a high numerical aperture (NA) imaging system
Experience in integrating heterogeneous subsystems for a complex physics experiment
Familiarity with Git, Linux, and command line interface (CLI) tools
Enthusiasm for staying up-to-date with latest developments in AMO physics and reviewing relevant papers for the team

Benefits

Comp & perks

100% company paid Employee coverage for Medical, Dental, Vision, and Short/Long Term Disability insurance programs
Employer funded Health Savings Account
Unlimited Paid Time Off
401(k) Matching Programs
Company paid Life and AD&D Insurance
Flexible Healthcare Savings Account
Paid FMLA Leave
Paid Maternity/Paternity Leave
Employer Assistance Program
Student Loan Repayment