Senior SI/PI Engineer — Optical Package & 448G

CspeedIO, Inc.; Palo Alto (CA); On-site; USD 180,000 - 260,000; Full time

Job summary

CspeedIO is a Palo Alto-based stealth startup developing next‑generation optical semiconductor solutions for AI infrastructure. We seek an Electronics/SiP expert to own electrical performance of optical engine packages, including SI/PI from die to host ASIC and power delivery across the package.

You will lead 3D EM modeling, correlation, and design guidance, collaborating with CMOS, optical, and packaging teams to achieve manufacturability and reliability in high‑density layouts.

Qualifications

• BS or higher in Electrical Engineering, Applied Physics, or a related field.
• 7+ years of package-level SI/PI analysis experience in optical/high‑speed hardware.

Responsibilities

• Perform 3D EM design and correlation for high‑speed interconnects.
• Define and optimize in‑package interconnect between IC and photonic dies.
• Characterize test vehicles to assess PCB materials, packages, and interconnects.
• Conduct S‑parameter and time‑domain measurements and compare with simulations.
• Collaborate with CMOS, optical, and packaging teams to align stack‑up and routing.

Skills

Signal Integrity

Power Integrity

High‑Speed Design

EM Simulation

Stackup & Routing

Education

BS or higher in Electrical Engineering / related

Tools

Ansys HFSS

SiWave

Cadence Sigrity

CST

Keysight ADS

Job description

CspeedIO is a Palo Alto-based stealth startup developing next‑generation optical semiconductor solutions for AI infrastructure. We seek an Electronics/SiP expert to own electrical performance of optical engine packages, including SI/PI from die to host ASIC and power delivery across the package.

You will lead 3D EM modeling, correlation, and design guidance, collaborating with CMOS, optical, and packaging teams to achieve manufacturability and reliability in high‑density layouts.