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greenhouse

Mechanical Design Engineer

Lightmatter
Boston, USA
Mid · 3+ years experience
Discovered 1 months ago
solidworks

Full Job Posting

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:

  • BS or MS in Mechanical Engineering or a related field.
  • Minimum of 3 years of mechanical design experience in semiconductor packaging, optoelectronics, or photonics modules.
  • 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.
  • Manage prototype builds with external vendors, validating the designs, and ensuring the 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.
  • Preferred Qualifications
  • Knowledge of ASME Y14.5 standards.
  • Ability to drive results independently and with minimal supervision.
  • 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.
  • We offer competitive compensation. The base salary range for this role determined based on location, experience, educational background, and market data.

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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