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!

Lightmatter is looking to hire a Reliability Test Intern for the summer of 2026. In this role you can expect to work with the reliability and test team on various projects related to testing reliability and characterization.

Responsibilities:

• Performing reliability/characterization tests
• Setting up the tests and writing the test automation script
• Perform test data analysis and presenting it to key stakeholders

Requirements:

• Currently pursuing a Bachelor’s in Electrical Engineering, Mechanical Engineering, Computer Science, or a related field
• Basic knowledge of test automation tools, python is preferred
• Familiarity with hardware testing equipment such as oscilloscopes, multimeters, and thermal sensors
• Understanding of basic electronics, circuits, and embedded systems
• Strong problem-solving and analytical skills
• Ability to work in a hands-on lab environment
• Willingness and curiosity to learn from an exciting team!

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

Salary Range: total compensation goes beyond base salary, it also includes a new hire equity grant, annual performance-based equity, and other rewards that recognize your impact and contribution.

$43—$47 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.