Senior Fiber Assembly Process Engineer

PsiQuantum•Milpitas, CA

4h•$110,000 - $177,000

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.

Requirements

MSc or PhD in photonics, optics, physics, engineering, or a related field, or equivalent industry experience.
5+ years of experience in fiber optics, optical system development and assembly.
Strong understanding of fiber optics and fiber splicing & measurement equipment.
Familiar with key opto-mechanical packaging and assembly equipment.
Proficiency in Python and JMP.
Experience with mechanical and/or optical instrumentation automation and control.

Nice To Haves

Familiarity with back-end semiconductor packaging is a plus.

Responsibilities

Study and root-cause sources of fiber splice loss and loss variability.
Develop and deploy advanced fiber processing equipment working with industrial partners.
Develop advanced measurement methodologies for validating fiber and fiber splice losses at datacenter scale.
Use optical simulation tools to model behavior & performance fiber-fiber interfaces for a wide range of advanced fiber designs.
Assess modal properties, loss mechanisms, dispersion, coupling, and other key fiber characteristics relevant to demanding optical applications, through optical modeling and experimental validation, model closure.
Work with the optical packaging and assembly validation teams to develop and deliver test methods for the performance and reliability of fiber interfaces.