Senior R&D Engineer, Photon Detector Model and Design

PsiQuantum’s mission is to build the first useful quantum computers—machines capable of delivering the breakthroughs the field has long promised. Since our founding in 2016, our singular focus has been to build and deploy million-qubit, fault-tolerant quantum systems. 

Quantum computers harness the laws of quantum mechanics to solve problems that even the most advanced supercomputers or AI systems will never reach. Their impact will span energy, pharmaceuticals, finance, agriculture, transportation, materials, and other foundational industries. 

Our architecture and approach is based on silicon photonics. By leveraging the advanced semiconductor manufacturing industry—including partners like GlobalFoundries—we use the same high-volume processes that already produce billions of chips for telecom and consumer electronics. Photonics offers natural advantages for scale: photons don’t feel heat, are immune to electromagnetic interference, and integrate with existing cryogenic cooling and standard fiber-optic infrastructure. 

In 2024, PsiQuantum announced government-funded projects to support the build-out of our first utility-scale quantum computers in Brisbane, Australia, and Chicago, Illinois. These initiatives reflect a growing recognition that quantum computing will be strategically and economically defining—and that now is the time to scale. 

PsiQuantum also develops the algorithms and software needed to make these systems commercially valuable. Our application, software, and industry teams work directly with leading Fortune 500 companies—including Lockheed Martin, Mercedes-Benz, Boehringer Ingelheim, and Mitsubishi Chemical—to prepare quantum solutions for real-world impact. 

Quantum computing is not an extension of classical computing. It represents a fundamental shift—and a path to mastering challenges that cannot be solved any other way. The potential is enormous, and we have a clear path to make it real. 

Come join us. 

Job Summary:

The Detector Design Team develops high-performance photon-number-resolving detectors, with a strong emphasis on device architecture, layout, and system-level integration. Detector performance is governed by the physical design of the signal path, materials, and cryogenic electrical readout and control, requiring careful translation of underlying physical models into robust layouts and circuits. The team leads detector design and physics-based simulation, and works closely with fabrication and test owners to develop new detector technologies and to plan and execute experimental characterization. We operate in rapid learning cycles of design → simulation → fabrication → measurement → model-driven analysis → next design.

The successful candidate will lead key aspects of detector design and layout optimization, focusing on physics-informed modeling, simulation, and data analysis of high-speed superconducting and cryogenic systems, and on using experimental results to validate and refine physical models that guide subsequent designs.

Responsibilities:

• Strong background in programming to build data analysis infrastructure and detector design layout.
• Drive superconducting model-experimental closure by mapping superconducting model & simulation results to experimental data, incl. error analysis.
• Development of physics-based and electronic predictive models of the detectors.
• Superconducting detectors design.