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Lumilens

Power Integrity Engineer-Silicon

San JosefulltimemidAdded 1 month ago

About this role

Lumilens seeks a senior power integrity engineer to architect robust power delivery systems for advanced 2.5D/3D photonic and AI chip packages. You'll optimize complex PDNs integrating multiple chiplets, photonic ICs, and memory while managing extreme power densities and tight voltage margins critical for next-generation AI infrastructure.

What you'll do

  • Design and implement power integrity architectures for heterogeneous 2.5D/3D packages with chiplets, interposers, and multi-rail topologies
  • Conduct full-stack power analysis including IR drop, electromigration, PDN impedance, and transient response validation
  • Model and simulate power delivery solutions using tools like Ansys SIwave, Cadence Sigrity, and Apache RedHawk
  • Lead power integrity co-design with silicon, package, and photonics teams to optimize layouts and voltage regulator placement
  • Select and qualify advanced power components (VRMs, capacitors, inductors) and collaborate with foundry partners on manufacturability
  • Drive lab validation through high-bandwidth measurements and correlation to simulation for production readiness

What they're looking for

  • Power delivery network (PDN) design and optimization
  • 2.5D/3D heterogeneous packaging and chiplet integration
  • PI simulation tools (Ansys, Cadence Sigrity, Apache RedHawk)
  • IR drop and electromigration analysis
  • High-speed signal integrity and noise mitigation
  • Advanced packaging technologies (CoWoS, hybrid bonding, FOWLP)
  • Lab characterization with oscilloscopes and network analyzers
  • Cross-functional collaboration and design methodologies
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Lumilens

Lumilens builds photonic chiplets and high-speed optical components for AI supercomputing and next-generation data center infrastructure. The company is hiring digital RTL designers, verification engineers, optical test engineers, and systems applications engineers to develop and validate its optical and electrical integration technologies.

View all jobs at Lumilens

Likely interview questions

  • Walk us through your experience designing power delivery networks for 2.5D/3D heterogeneous integration—what were the key challenges you faced with chiplets or interposers, and how did you optimize for noise and IR drop?
  • Describe your hands-on experience with power integrity simulation tools like Ansys SIwave, Cadence Sigrity, or Apache RedHawk. How have you validated PDN simulations against lab measurements, and what correlations issues have you debugged?
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