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Lightmatter

Foundry Engineer

Mountain View, CA · On-site

$180K - $212K/yr

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™ ...

Lightmatter

Analog/Mixed Signal Architect

Boston, MA · On-site

$149K - $216K/yr

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™ ...

Lightmatter

Photonics Architect

Boston, MA · On-site

$150K - $220K/yr

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™ ...

Lightmatter

Power Integrity Engineer

Mountain View, CA · On-site

$157K - $176K/yr

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™ ...

Lightmatter

Electro-Optic Systems Architect

Boston, MA · On-site

$150K - $220K/yr

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™ ...

Lightmatter

Sr. Staff Thermal Engineer

Boston, MA · On-site

$166K - $262K/yr

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™ ...

Lightmatter

Package Layout Engineer

Mountain View, CA · On-site

$157K - $176K/yr

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™ ...

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Infographic showing various job openings at Lightmatter in the United States as of August 2026, with employment types broken down into 97% Full Time, and 3% Temporary. Highlights an 94% Physical, 3% Hybrid, and 3% Remote job distribution.

Foundry Engineer

Lightmatter

Mountain View, CA • On-site

$180K - $212K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 4 days ago

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!
The person in this role will be a technology development and manufacturing team member working on planning, developing foundry process technology, manufacturing and characterization for next-generation Lightmatter products. The team will be creating product-specific silicon manufacturing process flow plan, working with supplier and internal core competency team such as package design team, silicon design teams on qualifying technology nodes, characterizing manufacturing processes and monitoring plan for Lightmatter products from product definition through qualification and high-volume manufacturing. It also involves engaging with design and platform engineering teams in addition to the supply chain organization to influence the definition of the product and to leverage the capabilities of the ecosystem from a manufacturing process perspective.
Responsibilities
  • Lead foundry process technology development, manufacturing strategies and specifications efforts for our highly integrated photonics-based AI platform and our photonics chiplet communication fabric
  • Establish silicon fabrication process coverage metrics and establish yield expectations and monitoring mechanisms
  • Provide manufacturing process solutions for integrated digital/analog/photonic/laser devices
  • Work closely with Foundry suppliers to ensure manufacturing output specifications are being met
  • Collaborate with the Design-For-Manufacturing (DFM) team early in the design process
  • Develop silicon technology and capability roadmap to support Lightmatter product requirement.
  • Develop initial product fabrication qualification and execution plan
  • Establish metrics and methodology to characterize and ensure reliable product operation at customer sites over the expected product lifetime
  • Collaborate with design and /layout team to coordinate product tapeout to foundry.

Qualifications
  • Bachelor's in Electrical Engineering, Physics, Materials Engineering/Science, Mechanical Engineering or other related fields
  • At least 8 years of industry experience with at least 5 years of silicon process experience
  • Experience bringing products from first silicon to production
  • Strong knowledge of working and collaborating with a foundry
  • Experience with Silicon foundry processes, technologies, control plan and failures related to Silicon.
  • Exposure to packaging technology with understanding of assembly processes, packaging materials, quality and reliability standards, and packaging failure mechanism etc is preferred

Preferred Qualifications:
  • Experience in foundry manufacturing process or process development/integration engineer in any fab foundries
  • Experience in photonics laser foundry and package integration
  • Master's or Phd in chemistry, materials sciences or physics.

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.
$180,000-$212,000 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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