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Fiber Assembly Process Engineer
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Milpitas, CA
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PsiQuantum

Fiber Assembly Process Engineer

Milpitas, CA, United States

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Job details

Experience: 5+ years of experience in fiber optics, optical system development and assembly.
Posting language: English
Posted: Nov 9, 2026

Original job description

[We will consider candidates at all levels - Associate to Senior]

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 Senior Fiber Assembly Process Engineer will be responsible for the development of advanced assembly instrumentation for high-performance and high throughput fiber splicing, and study and address fiber and splice reliability at the scale of datacenters. This role combines fiber engineering, opto-mechanical automation, optical assembly manufacturing and semiconductor process development.

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.

Experience/Qualifications:

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 optical fibers 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.
Familiarity with back-end semiconductor packaging is a plus.

PsiQuantum provides equal employment opportunity for all applicants and employees. PsiQuantum does not unlawfully discriminate on the basis of race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, military or veteran status, marital status, domestic partner status, sexual orientation, genetic information, or any other basis protected by applicable laws.

Note: PsiQuantum will only reach out to you using an official PsiQuantum email address and will never ask you for bank account information as part of the interview process. Please report any suspicious activity to recruiting@psiquantum.com.

We are not accepting unsolicited resumes from employment agencies. Base pay is one part of the total compensation package. Full-time roles are eligible for equity and benefits. Our compensation ranges reflect the cost of labor across multiple U.S. geographic markets, and we pay based on defined geographic zones. This position may be filled within one of the following U.S. geographic zones, each with its own salary range.

Actual compensation may vary outside of these ranges and is dependent on various factors including, but not limited to, a candidate's qualifications, relevant education and training, competencies, experience, geographic location, business needs, and internal equity. Your recruiter can share more details about the salary range applicable to your location during the hiring process.

Zone 1 - Bay Area and NYC
Zone 2 - Examples include Los Angeles and Washington DC
Zone 3 - Examples include Austin, Chicago, and Sacramento
Zone 4 - Examples include Nashville and Phoenix/Tempe and many remote locations

This position includes the following benefits: competitive health coverage for you and your dependents, 401(k) with company match, equity grants, access to financial wellness tools and planning resources, wellness benefits, family support programs, life and disability insurance, paid leave programs, company-designated paid holidays, discretionary time off (DTO), and an end-of-year company shutdown. Some of these benefits have eligibility requirements and may vary based on location, role, or employment status. Many of these benefits are subsidized or fully paid for by the company.

The estimated annual base salary range for this role is:

Zone 1

$150,800 - $177,200 USD

Zone 2

$135,700 - $159,500 USD

Zone 3

$120,700 - $141,800 USD

Zone 4

$105,500 - $124,000 USD

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More about this job

Skills

Assembly
Quantum mechanics
Packaging
Photonics
Fibre optics
Python
Optical engineering
Recruitment

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