Silicon Packaging Engineer - Intern & New Grad

Lightmatter, Inc.; Mountain View, Northern (CA, KY); Hybrid; USD 55,000 - 92,000; Full time

Benefits offered by this job

Retirement Savings Matching Program

Life Insurance (Basic, Voluntary & AD&

Generous Time Off (Vacation, Sick &amp

Paid Family Leave

Short Term & Long Term Disability

Training & Development

Flexible, hybrid workplace model

Equity grants (applicable to full-time

Job summary

Lightmatter is hiring for a Silicon Packaging Engineer at the intern/new grad level in Mountain View, CA. The role spans cross-disciplinary packaging work at the interface of electrical, mechanical, optical, and thermal engineering to bring co-packaged optics from concept to high-volume production.

We seek juniors through PhD candidates for both internship and full-time positions, with hands-on project experience and familiarity with essential tools.

Qualifications

• Pursuing or recently completed a BS, MS, or PhD in Electrical Engineering, Mechanical Engineering, Materials Science, or a related field
• Hands-on experience through coursework, capstone projects, research labs, or internships
• Familiarity with at least one relevant tool — SolidWorks, ANSYS, ADS, Cadence, Python, MATLAB, or similar
• Curious, collaborative, and comfortable asking questions

Responsibilities

• Signal & Power Integrity — high-speed interface analysis (PCIe, UCIe, SerDes), PDN design and simulation, eye diagrams, jitter, S-parameters
• Thermal Engineering — CFD simulation, heat sink and TIM evaluation, liquid cooling, package-level thermal analysis
• Mechanical & Thermo-Mechanical Design — structural analysis, tolerance stack-up, GD&T, FEA, solder fatigue, CTE mismatch
• Packaging Integration — 2.5D/3D packaging, fiber attach, heterogeneous integration, assembly yield and reliability

Skills

Hands-on experience

Curious

Collaborative

Problem-solving

Education

BS/MS/PhD in Electrical/Mechanical/Materials Science or related

Tools

SolidWorks

ANSYS

ADS

Cadence

Python

MATLAB

Job description

Silicon Packaging Engineer - Intern & New Grad

Mountain View, CA

Lightmatter is leading the revolution in AI data center infrastructure, enabling the next giant leaps in human progress. The company invented the world’s first 3D-stacked photonics engine, Passage™, capable of connecting thousands to millions of processors at the speed of light in extreme-scale data centers for the most advanced AI and HPC workloads.

Lightmatter raised $400 million in its Series D round, reaching a valuation of $4.4 billion. We will continue to accelerate the development of data center photonics and grow every department at Lightmatter!

If you're passionate about tackling complex challenges, making an impact, and being an expert in your craft, join our team of brilliant scientists, engineers, and accomplished industry leaders.

Lightmatter is (re)inventing the future of computing with light!

The Packaging team at Lightmatter

We are building the world's first photonic engine for AI at scale, and packaging is where the physics meets the product. Our Silicon Packaging team works at the intersection of electrical, mechanical, optical, and thermal engineering to bring co-packaged optics from concept to high-volume production.

We're hiring across all levels from juniors undergrads to PhD candidates for both internship and full-time new grad positions. Wherever you are in your academic journey, you'll work on real problems from day one alongside engineers who have shipped leading-edge products at the world's most demanding semiconductor in the world. Why should you apply? To have the best and most interesting internship experience! Packaging at Lightmatter means working on co-packaged optics for the AI infrastructure that doesn't exist yet and helping build the team and methods that will make it real.

Responsibilities

Depending on your background, you'll contribute to one or more of these areas:

• Signal & Power Integrity — high-speed interface analysis (PCIe, UCIe, SerDes), PDN design and simulation, eye diagrams, jitter, S-parameters
• Thermal Engineering — CFD simulation, heat sink and TIM evaluation, liquid cooling, package-level thermal analysis
• Mechanical & Thermo-Mechanical Design — structural analysis, tolerance stack-up, GD&T, FEA, solder fatigue, CTE mismatch
• Packaging Integration — 2.5D/3D packaging, fiber attach, heterogeneous integration, assembly yield and reliability

Qualifications

• Pursuing or recently completed a BS, MS, or PhD in Electrical Engineering, Mechanical Engineering, Materials Science, or a related field
• Hands-on experience through coursework, capstone projects, research labs, or internships
• Familiarity with at least one relevant tool — SolidWorks, ANSYS, ADS, Cadence, Python, MATLAB, or similar
• Curious, collaborative, and comfortable asking questions

We offer competitive compensation. The base salary range for this role determined based on location, experience, educational background, and market data.

Hourly Range

$40 - $67 USD

• Retirement Savings Matching Program
• Life Insurance (Basic, Voluntary & AD&D)
• Generous Time Off (Vacation, Sick & Public Holidays)
• Paid Family Leave
• Short Term & Long Term Disability
• Training & Development
• Flexible, hybrid workplace model
• Equity grants (applicable to full-time employees)

Benefits eligibility may vary depending on your employment status and location. Lightmatter recruits, employs, trains, compensates, and promotes regardless of race, religion, color, national origin, sex, disability, age, veteran status, and other protected status as required by applicable law.

Export Control

Candidates should have capacity to comply with the federally mandated requirements of U.S. export control laws.

U.S. Standard Demographic Questions

We invite applicants to share their demographic background. If you choose to complete this survey, your responses may be used to identify areas of improvement in our hiring process.

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Voluntary Self-Identification

For government reporting purposes, we ask candidates to respond to the below self-identification survey.Completion of the form is entirely voluntary. Whatever your decision, it will not be considered in the hiringprocess or thereafter. Any information that you do provide will be recorded and maintained in aconfidential file.

As set forth in Lightmatter’s Equal Employment Opportunity policy,we do not discriminate on the basis of any protected group status under any applicable law.

If you believe you belong to any of the categories of protected veterans listed below, please indicate by making the appropriate selection.As a government contractor subject to the Vietnam Era Veterans Readjustment Assistance Act (VEVRAA), we request this information in order to measurethe effectiveness of the outreach and positive recruitment efforts we undertake pursuant to VEVRAA. Classification of protected categoriesis as follows:

A "disabled veteran" is one of the following: a veteran of the U.S. military, ground, naval or air service who is entitled to compensation (or who but for the receipt of military retired pay would be entitled to compensation) under laws administered by the Secretary of Veterans Affairs; or a person who was discharged or released from active duty because of a service-connected disability.

A "recently separated veteran" means any veteran during the three-year period beginning on the date of such veteran's discharge or release from active duty in the U.S. military, ground, naval, or air service.

An "active duty wartime or campaign badge veteran" means a veteran who served on active duty in the U.S. military, ground, naval or air service during a war, or in a campaign or expedition for which a campaign badge has been authorized under the laws administered by the Department of Defense.

An "Armed forces service medal veteran" means a veteran who, while serving on active duty in the U.S. military, ground, naval or air service, participated in a United States military operation for which an Armed Forces service medal was awarded pursuant to Executive Order 12985.