D
Mountain View, California, United States
$192K – $260K/yr
L
Active2mo ago
Sr. Staff Thermo-Mechanical Engineer
Role overview
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! In this role, you will work on leading-edge packaging technologies to enable AI a
…About this listing
- Source: Lightmatter's official careers site (via Greenhouse) · last confirmed on the source 27 Oct 2026
- Posted 9 Aug 2026
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What they are looking for
Skills & requirements
Qualification
MS or PhD in Mechanical Engineering, Material Science, or a related engineering field. Deep expertise in finite element analysis using commercial tools such as Ansys, Abaqus, or equivalent, with demonstrated ability to develop and validate models for complex multi-material assemblies. Hands-on experience with multi-physics simulation including thermal-structural coupling, solder joint fatigue modeling, and warpage analysis. Strong understanding of semiconductor packaging failure modes including solder fatigue, delamination, CTE mismatch-driven stress, and underfill cracking under thermal cycling conditions. Experience with wafer-level and unit-level assembly processes including flip-chip, BGA, and advanced 3D packaging architectures. Proficiency in Python and/or MATLAB for simulation automation, data analysis, and scripting. Demonstrated ability to develop analytical or semi-empirical models for first-order engineering assessments. Experience driving characterization and validation programs through internal prototyping and external vendor collaboration. Preferred
Department · Photonics Packaging Engineering
Hiring company
Lightmatter
Rethinking the limits of AI, Lightmatter merges photonics and computing to build a future where speed, efficiency, and intelligence converge.
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