Senior System Integration Engineer

PsiQuantum•Milpitas, CA

1d•$140,000 - $200,000

About The Position

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. The Senior System Integration Engineer reports into the System Design organization. This role is responsible for system connectivity, rack layout design, and overall system readiness and integration to enable system commissioning.

Requirements

M.S. or PhD in Physics, Optical or Electrical Engineering with 5+ years industry experience.
3+ years industry experience validating and testing optical systems.
Expertise in cross-functional product development.
Experience in complex system integration and fiber networking.
Experience working with optical test equipment including power meters, optical backscatter reflectometers (OBR), optical spectrum analyzer (OSA).
Strong organizational skills, excellent communication skills, attention to detail and ability to multitask.
Strong critical thinking, creative, innovative, analytical, and detail oriented problem-solving skill.
Ability to work independently with limited direction.

Nice To Haves

Expertise with advanced fiber optic technologies such as sensing, timing distribution, clock distribution, or submarine telecoms applications.
Knowledge, expertise and experience with optical transmission systems, laser sources, optical fiber to die coupling technologies.

Responsibilities

System integration of electro-optic components through racks, ducts and cryostats.
Define overall system connectivity for complex systems and subsystems.
Rack layout design, documentation, bring up procedures.
Support design leads to acquire necessary equipment for subsystem operation and testing.
Design of smaller subsystems to enable validation of boxes and subsystems.
Write and maintain connectivity and integration documentation.
Maintain rack and top-level system designs, including optical and electrical connectivity BOMs.
Python scripting, calling Controls SW APIs / drivers to control lab equipment and proprietary systems.
Write and maintain documentation of system performance.
Coordinate cross-functionally to meet requirements and schedule with System Design leads, Electronics Design, Validation, System Commissioning, System Architecture, and Quantum Operating Software teams.
Adapt to new challenges and develop new skills to suit the task at hand.
Other duties and responsibilities as assigned.