# Senior/Principal Signal Integrity Engineer-Silicon Photonics & AI Interconnects at Lumilens

- Company: Lumilens
- What the company does: Backed by Redpoint.
- Company website: https://lumilens.com/
- Type: Startups (AI role)
- Level: Principal and up
- Location: San Jose
- Work setup: On-site
- Posted: 2026-03-23
- Apply by: 2026-10-08
- Apply: https://jobs.ashbyhq.com/lumilens/6847a355-f74b-4447-9f4f-206a28e41de7
- Page: https://www.1752.vc/careers/jobs/lumilens-senior-principal-signal-integrity-engineer-silicon-photonics-and-ai-int/

## About the role

Lumilens is revolutionizing AI compute infrastructure with next-generation photonic interconnects. Our solutions—leveraging co-packaged optics (CPO), near-packaged optics (NPO), high-density silicon photonics, and advanced heterogeneous integration—enable massive scale-out and scale-up architectures for the world's leading AI providers.

## What they're looking for

- Bachelor's or Master's degree in Electrical Engineering, Physics, or related field (PhD preferred)
- 10+ years of relevant experience in high-speed SI/PI, with strong emphasis on board-level, package-level, and silicon-level design/validation
- Deep expertise in very high-speed SerDes (≥56G, preferably 100G/200G PAM4), including channel modeling, equalization (FFE/DFE/CTLE), jitter/crosstalk analysis, eye diagrams, BER, and compliance/margining
- Extensive hands-on experience with leading SI/PI/EM tools (e.g., Ansys HFSS 3D/Layout, SIwave, Clarity, CST, Keysight ADS Momentum/Sigrity, HSPICE, HyperLynx)
- Proven proficiency in time-domain transient simulations (HSPICE, ADS, MATLAB/Simulink) and scripting/automation (Python, TCL, MATLAB) for simulation flows, data analysis, and reporting
- Hands-on experience with 2.5D/3D packaging technologies (silicon/organic interposers, chiplet integration, HBM stacking) and high-frequency transmission line routing in silicon/photonic contexts

Tags: Engineering