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Lightmatter

Photonic computing hardware for AI acceleration

Mechanical Design Engineer

Design EngineeringConfirmed live in the last 24 hours
Full-timeMountain View, CA, USA

About the Job

Requirements

  • A BS or MS in Mechanical Engineering or a related field is required.
  • At least 3 years of mechanical design experience in semiconductor packaging, optoelectronics, or photonics modules is required.
  • Proficiency in CAD tools such as SolidWorks or Creo, with a focus on mechanical design best practices, is required.
  • Expertise in Geometric Dimensioning and Tolerancing (GD&T) and tolerance stack-up analysis is required.
  • Manage prototype builds with external vendors, validate the designs, and ensure scalability to high-volume manufacturability.
  • Working knowledge of semiconductor packaging technologies, including the mechanical and thermal trade-offs of 3D, 2.5D, and FCBGA architectures, is required.

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 failure mode and effects analyses (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.

Desired Qualifications

  • Knowledge of ASME Y14.5 standards.
  • Ability to drive results independently and with minimal supervision.
  • Working knowledge of finite element analysis (FEA) tools such as 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 outsourced semiconductor assembly and test (OSAT) engagement in Asia.
  • Cross-functional communication skills and a bias toward fast, data-driven iteration.

About the Company

Lightmatter

Photonic computing hardware for AI acceleration

Lightmatter develops photonic computing hardware that accelerates AI workloads using light-based processors. Its photonic supercomputers run AI tasks faster and use far less energy (about 10x faster and 90% less energy) than traditional electronic systems. The company differentiates itself by focusing on electro-photonic systems and practical AI acceleration for AI and autonomous vehicle workloads, working with universities and selling hardware, software licenses, and partnerships. Its goal is to bring scalable photonic computing to market so AI and self-driving applications can run faster, more efficiently, and at larger scale.

Company size
201-500
Company stage
Series D
Total funding
$822M
Headquarters
Mountain View, CA
Founded
2017

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