Jobs in the United States

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Senior Software Engineer
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PsiQuantum

Associate Characterization and Test Engineer

Milpitas, CA, United States

Apply on psiquantum.com About employer

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Job details

Experience: 0–3 years of experience in engineering characterization, testing, laboratory operations, or product development.
Posting language: English
Posted: Nov 10, 2026

Original job description

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.

That approach has since been tested at the highest level of scrutiny the U.S. government applies to emerging technology, and it has held up. In 2025, PsiQuantum closed a $1 billion funding round that valued the company at $7 billion. In 2026, the U.S. Department of Commerce signed a $100 million Letter of Intent under the CHIPS and Science Act, followed by a $125 million agreement with DARPA under Stage C of its Quantum Benchmarking Initiative, PsiQuantum's most valuable U.S. government agreement to date. This year, we also broke ground on our utility-scale quantum computer in Brisbane, Australia, and continued building out our Chicago site. Victor Peng, our CEO, and co-founder Jeremy O'Brien, now Executive Chairman, lead a team and board that reflects how seriously the world is taking this build, joined this year by Intel's Lip-Bu Tan and Atomico's Niklas Zennström.

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 Airbus, 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 now have the funding, the government validation, and the sites under construction to make it real.

Job Summary:

The Characterization & Test Engineer will support the evaluation, characterization, and validation of photonic devices, packages, and subsystems. This role will be responsible for executing electrical, optical, thermal, and mechanical tests, analyzing data, and supporting failure analysis and reliability investigations. The engineer will work closely with product, packaging, reliability, and manufacturing teams to generate high-quality data that enables product development and qualification.

Responsibilities:

Execute electrical, optical, thermal, and mechanical characterization of photonic devices, packages, and assemblies.
Develop and perform test plans to support product development, process validation, reliability testing, and failure analysis activities.
Operate and maintain laboratory equipment, including optical measurement systems, vibrometers, thermal imaging systems, and mechanical testers.
Collect, analyze, and interpret test data to identify performance trends and engineering insights.
Support Design of Experiments (DOE) planning, execution, and data analysis.
Assist in root-cause investigations by performing characterization and supporting failure analysis activities.
Develop automated test scripts and data analysis tools using Python or similar programming languages.
Generate clear technical reports and communicate results to cross-functional teams.
Contribute to the development of new characterization methods, test fixtures, and laboratory capabilities.
Support qualification and reliability testing activities, including thermal, mechanical, and environmental stress testing.
Maintain laboratory documentation, procedures, and equipment calibration records.
Collaborate with product, packaging, reliability, process, and manufacturing engineers to solve technical challenges.

Experience/Qualifications:

Bachelor's or master’s degree in Mechanical engineering, Optical Engineering, Applied Physics, or a related discipline.
0–3 years of experience in engineering characterization, testing, laboratory operations, or product development.
Hands-on experience operating characterization equipment including Infrared Thermography, Laser Doppler Vibrometers (LDV), Instron Universal Mechanical Testers, and C-Mode Scanning Acoustic Microscopy (C-SAM).
Experience analyzing thermal, mechanical, vibration, and package integrity data to support product development, reliability, and failure analysis activities.
Experience with laboratory instrumentation and data acquisition systems.
Basic understanding of optics, photonics, electronics, semiconductor devices, or advanced packaging technologies.
Familiarity with data analysis tools such as Python, MATLAB, JMP, or equivalent.
Knowledge of Design of Experiments (DOE) and statistical analysis methods.
Strong analytical and problem-solving skills.
Excellent written and verbal communication skills.
Self-motivated and able to work effectively in a fast-paced R&D environment.

Preferred Qualifications

Experience with photonic devices, optoelectronics, semiconductor packaging, or advanced manufacturing.
Familiarity with optical alignment, imaging systems, or optical characterization techniques.
Experience with automation, scripting, and test development.
Exposure to reliability testing or failure analysis methodologies.

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 $52.02 - $61.11 USD

Zone 2 $46.83 - $55 USD

Zone 3 $41.59 - $48.89 USD

Zone 4 $36.39 - $42.79 USD

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More about this job

Skills

Quantum mechanics
P.Eng.
Packaging
Maintain laboratory equipment
Data analysis
Python
Programming languages
Documentation
Mechanical engineering
Optical engineering
C
SAM
Data acquisition systems
Photonics
The MathWorks MATLAB
Statistics
Problem solving
Communication skills
Optoelectronics
Apply advanced manufacturing
Recruitment

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Jobs in the United States