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!
In this role, you will be working on leading-edge packaging technologies to enable AI architectures that set new industry standards for compute power, performance, and efficiency. As a member of the Packaging Analysis team, you will perform mechanical design and structural analysis for emerging packaging technologies. You will identify key failure modes under product use conditions and run appropriate parametric design studies to influence product and package design upstream. You will be responsible for the package stack-up analysis, defining mechanical and thermal aspects that influence package form factors, and driving socket/enabling mechanisms. You will utilize Finite Element Analysis (FEA) and Geometric Dimensioning and Tolerancing (GD&T) to propose solutions that finalize the design. Your work will result in advanced package designs that meet power dissipation, assembly, and reliability requirements, while delivering a system level solution for leading edge products in the data centers and high-end compute segment.
Responsibilities:
- Create mechanical models of package stack-up and associated components.
- Perform mechanical design analysis to identify and implement solutions that improve package mechanical integrity.
- Execute geometric tolerance analysis and create GD&T drawings and CAD models.
- Conduct finite element analysis to highlight key design, assembly, and reliability trade-offs.
- 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.
- Generate modeling and simulation reports.
Requirements:
- BS, MS or PhD in Mechanical Engineering or a related field.
- Minimum of 5 years of experience in mechanical design and finite element analysis.
- Experience in CAD tools such as Solidworks or AutoCAD, with a focus on mechanical design best practices.
- Expertise in Geometric Dimensioning and Tolerancing (GD&T) and tolerance stack-up analysis.
- Hands-on experience with FEA solvers such as ABAQUS or ANSYS.
- Working knowledge of semiconductor packaging technologies, including the mechanical and thermal trade-offs of 3D, 2.5D, and FCBGA architectures.
Preferred Qualifications
- Knowledge of ASME Y14.5 standards.
- Excellent communication skills and ability to work well in cross functional teams.
- Ability to drive results independently and with minimal supervision.
- Creative problem-solving skills with a focus on rapid solution implementation.
We offer competitive compensation. The base salary range for this role determined based on location, experience, educational background, and market data.
- 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.
Skills Required
- BS, MS or PhD in Mechanical Engineering or a related field
- Minimum of 5 years of experience in mechanical design and finite element analysis
- Experience in CAD tools such as Solidworks or AutoCAD
- Expertise in Geometric Dimensioning and Tolerancing (GD&T) and tolerance stack-up analysis
- Hands-on experience with FEA solvers such as ABAQUS or ANSYS
- Working knowledge of semiconductor packaging technologies
Lightmatter Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Lightmatter and has not been reviewed or approved by Lightmatter.
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Fair & Transparent Compensation — Pay is considered competitive for specialized photonics and AI‑hardware roles, with posted ranges and third‑party totals aligning to strong market levels. Compensation for niche roles is framed as consistent with top‑tier hardware/photonics expectations.
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Healthcare Strength — Healthcare is described as comprehensive, covering medical, dental, and vision in current postings. Additional protections like life insurance and disability are also called out.
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Equity Value & Accessibility — Equity grants for full‑time employees are commonly included alongside base pay. Some postings also mention performance‑based equity components.
Lightmatter Insights
What We Do
Lightmatter is a startup photonics company that has pioneered a new paradigm in processor chip architecture that uses photons instead of electrons. Now the leader in the photonic AI compute “space race,” this new class of high performance semiconductors is the foundation of Lightmatter’s mission to enable the growth of computing, reduce harmful emissions associated with this growth, and democratize computing for all. Lightmatter's technology accelerates critical operations in deep neural networks, using an array of programmable photonic elements fabricated alongside transistors in conventional computer chip fabrication processes. Our close-knit team of engineers has created an integrated photonics chip and ultra-high performance interconnect that is faster, more efficient, and cooler than anything else on earth (or anything ever experienced before) to power the next giant leaps in human progress.
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