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Lightmatter

Physical Design, Intern (Summer 2027)

Boston, MA, United States

$50 - $55 USD

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Job details

Pay: $50 - $55 USD
Posting language: English
Posted: Nov 13, 2026

Original job description

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!

About this job

This team is responsible for defining and implementing the flow and methodology for the digital physical design of Lightmatter’s chips. We interface with multiple teams and utilize industry best practices to develop flows and methodologies which enable the physical design team to design and implement chips, while optimizing power, performance, and area.

Responsibilities:

Learn the Lightmatter physical design flow
Improve the physical design flow through scripting in languages such as Python
Investigate usage of AI to improve and augment the physical design flow
Work with members of the physical design team on physical implementations or analysis
Work with other teams in Lightmatter such as the analog design team or photonics team to collaborate on and improve mixed signal and mixed signal + photonics design methodologies

Requirements:

Currently enrolled in a Masters or PhD program
Interest in physical design
Familiar with TCL or Python scripting
Knowledge of physical design tools and flows
Understanding of the concepts of synthesis, place and route, and LVS/DRC
Understanding of VLSI design fundamentals
Willingness and curiosity to learn from an exciting team!

Preferred Qualifications

Research, lab, or prior internship experience in physical design involving photonics, semiconductors, or AI hardware
Publications, projects, or open-source contributions related to physical design or python programming
Prior experience or coursework relevant to physical design

Our internship hourly rates are a standard pay determined based on the position and your location, year in school, degree, and experience.

Hourly Rate in USD

$50 - $55 USD

Benefits

Comprehensive Health Care Plan (Medical, Dental & Vision)
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
Commuter Benefits
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.

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Jobs in the United States