Senior Fiber Assembly Process Engineer

PsiQuantum; Milpitas (CA); On-site; USD 110,000 - 160,000; Full time

Job summary

PsiQuantum is seeking a Senior Fiber Assembly Process Engineer to develop advanced assembly instrumentation for high-throughput fiber splicing and to study fiber and splice reliability at datacenter scale.

You will blend fiber engineering, opto-mechanical automation, optical assembly manufacturing, and semiconductor process development to deliver robust fiber interfaces and scalable solutions.

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 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 with industrial partners.
• Develop advanced measurement methodologies for validating fiber and splice losses at datacenter scale.
• Use optical simulation tools to model fiber-fiber interfaces for diverse designs.
• Assess modal properties, loss mechanisms, dispersion, and coupling in fiber interfaces through modeling and experiments.
• Collaborate with packaging and validation teams to deliver tests for fiber interface performance.

Skills

Fiber optics

Fiber splicing

Python

JMP

Automation

Instrumentation

Optical design

Education

MSc or PhD in photonics/optics/physics/engineering or related field

Tools

Python

JMP

Optical measurement equipment

Semiconductor packaging experience

Job description

PsiQuantum’smission 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 approachisbased on silicon photonics. Byleveragingthe 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: photonsdon’tfeel heat, are immune to electromagnetic interference, and integrate with existing cryogenic cooling and standard fiber-optic infrastructure.

In 2024,PsiQuantumannounced 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.

PsiQuantumalso 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. Itrepresentsa fundamental shift—and a path to mastering challenges that cannot besolvedany other way. The potential is enormous, and we have a clearpathto 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 [e-mail]****.

We are not accepting unsolicited resumes from employment agencies.

The ranges below reflect the target ranges for a new hire base salary. One is for the Bay Area (within 50 miles of HQ, Palo Alto), the second one (if applicable) is for elsewhere in the US (beyond 50 miles of HQ, Palo Alto). If there is only one range, it is for the specific location of where the position will be located.Actual compensation may vary outside of these ranges and is dependent on various factors including but not limited to a candidate’s qualifications including relevant education and training, competencies, experience, geographic location, and business needs. Base pay is only one part of the total compensation package. Full time roles are eligible for equity and benefits. Base pay is subject to change and may be modified in the future.

U.S. Base Pay Range

$110,000—$160,000 USD

Bay Area Pay Range

$150,000—$177,000 USD