Lightmatter
Mechanical Design Engineer
Boston, MA; Mountain View, CA · Staff+ · Full-time
Sponsorship not specified$135k-$212kDetected 6 days ago
ValuationSolidWorksCreoANSYSFEAGD&TMechanical DesignCommunicationTolerance Analysis
About the role
- 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.
Responsibilities
- Create CAD models of package stack-up and associated components.
- Perform mechanical design analysis to identify and implement solutions that improve package mechanical integrity.
- Execute tolerance stack-up analyses and create GD&T drawings for advanced packages - including optically aligned assemblies where micron-level precision defines product performance
- Apply manufacturing expertise to influence design choices, perform FMEAs, and evaluate the cost implications of process and design decisions.
- Collaborate with package and systems teams to ensure packaging solutions comply with system boundary conditions.
Requirements
- Proficiency in CAD tools such as Solidworks or Creo, with a focus on mechanical design best practices.
- Expertise in Geometric Dimensioning and Tolerancing (GD&T) and tolerance stack-up analysis.
- Working knowledge of semiconductor packaging technologies, including the mechanical and thermal trade-offs of 3D, 2.5D, and FCBGA architectures.
Nice to have
- Knowledge of ASME Y14.5 standards.
- Working knowledge of FEA tools (ANSYS, Abaqus, or similar) for structural and thermal analysis.
- Fiber array unit (FAU) attach, optical connector, or photonic alignment experience.
- Experience with liquid cooling or advanced thermal architectures for AI/HPC systems.
- Exposure to high-volume manufacturing and OSAT engagement in Asia.
- Strong cross-functional communication skills and a bias toward fast, data-driven iteration.
Skills
- Lightmatter is leading the revolution in AI data center infrastructure, enabling the next giant leaps in human progress.
- Lightmatter raised $400 million in its Series D round, reaching a valuation of $4.4 billion.
- Lightmatter is (re)inventing the future of computing with light!
Compensation
- 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.
- $135,000 - $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
- 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
Visa & Work Authorization
- Export Control
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This listing is sourced directly from Lightmatter's careers page and normalized into a canonical job model.