Lightmatter
Photonics Characterization Intern- Winter 2026
Boston, MA · Intern · Internship
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About the role
- 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.
Responsibilities
- Design and execute testing protocols for silicon photonics chips and subsystems.
- Develop and implement automated testing and system interfacing through Python scripting.
Requirements
- Recent PhD graduate OR PhD candidate in Photonics with a strong understanding of Silicon Photonics and demonstrated experience in electro-optic component testing.
- The ideal candidate will leverage hands-on laboratory experience with various optical and semiconductor test equipment, and be skilled in developing and implementing automated testing using Python scripting.
- This highly analytical, process-oriented individual must be capable of working independently to solve complex technical problems and translate data into actionable strategies.
- Experienced in developing and implementing automated testing systems using Python scripting, with a proven ability to translate data into actionable strategies.
- Highly analytical, process-oriented, and capable of working independently to solve complex, non-obvious technical problems in a lab environment.
- Excellent written and verbal communication skills.
Nice to have
- Microcontroller programming
- Experience with high speed instruments
- High speed communications and understanding of VNA and optical link
- Understanding of high speed PCBs and/or micro electronics
- Experience working in a graduate level photonics or electrical engineering lab.
- Willingness and curiosity to learn from an exciting team!
Compensation
- We offer competitive compensation.
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
- Commuter Benefits
- Equity grants (applicable to full-time employees)
- 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.
- Flexible, hybrid workplace model
- Benefits eligibility may vary depending on your employment status and location.
Visa & Work Authorization
- Export Control
This listing is sourced directly from Lightmatter's careers page and normalized into a canonical job model.