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Infleqtion is a global quantum technology company developing quantum computers, sensors, and networks. The Quantum Spectrum (QRF) team builds fieldable radio-frequency sensing systems based on Rydberg atoms, combining atomic physics, lasers, photonics, RF electronics, embedded controls, and precision hardware.
You will own defined experimental campaigns addressing quantum RF sensor sensitivity, noise, stability, bandwidth, dynamic range, and repeatability. This is a hands-on laboratory role reporting to the Director of R&D, Quantum RF, where you independently execute experiments and testbeds under senior technical direction.
Key responsibilities include: building, aligning, commissioning, operating, and troubleshooting persistent testbeds integrating lasers, optics, atomic-sensing hardware, RF instrumentation, controls, and data acquisition; designing and executing controlled experiments to isolate performance limitations and convert results into hardware, operating-point, calibration, or control-system improvements; characterizing vapor cells and RF resonators for thermal, optical, geometric, material, and field-delivery effects; establishing and maintaining laser-frequency locks and optical-power stability; calibrating and characterizing RF delivery through electrodes, resonators, antennas, and test configurations; developing automated instrument-control and data-analysis workflows in Python; analyzing experimental data with appropriate uncertainty and noise treatment; translating findings into design recommendations, test procedures, and technical reports; collaborating with RF, optical-mechanical, electrical, embedded-software, and systems personnel; and providing occasional support for laboratory and field demonstrations.
Required: Bachelor's in physics, applied physics, optical engineering, electrical engineering, or related field plus 4+ years hands-on experimental experience (or Master's + 2 years, or PhD with directly relevant research). Demonstrated hands-on experience building, aligning, operating, and troubleshooting complex experimental apparatus integrating lasers/optics, electronics, RF/microwave hardware, thermal/mechanical hardware, and software/controls. Practical experience with laser alignment, photodetection, electronic instrumentation, and diagnosing noise and stability issues. Working knowledge of RF measurements and experience with signal generators, spectrum analyzers, oscilloscopes, or vector network analyzers. Ability to design controlled experiments, analyze noisy data, assess measurement uncertainty, and draw defensible conclusions. Experience automating experiments and analyzing data using Python or comparable scientific programming. Ability to independently plan and execute defined laboratory work, document results clearly, and collaborate across disciplines while seeking senior direction for broader strategy. Comfortable in fast-moving environments where designs, schedules, and constraints evolve quickly.
