Signal Integrity Engineer –1.6T OSFP Board Design
Bengaluru, Karnataka, India / Onsite
ABOUT LUMILENS
At Lumilens we are building the critical photonics infrastructure that powers tomorrow’s AI supercomputing. From chip-to-chip optical interconnects to scalable photonic engines, Lumilens is unlocking a new era of computing faster, cooler, and massively more efficient.
We’re a well-funded startup backed by Mayfield and led by veterans who’ve built And scaled some of the most transformative technologies in the industry. This isn’t incremental innovation, it’s a ground-floor opportunity to rethink the optical layer from the silicon up. You’ll work alongside a team of world-class engineers solving some ofthe hardest challenges in optics, systems, and scale. Every line of code, every design decision, every breakthrough you help deliver will shape the infrastructure of tomorrow.
If you're looking for mission, momentum, and the chance to make an outsized impact jump on the rocket ship. We’re just getting started.
Role Overview
We are seeking a Signal Integrity (SI)
Engineer with 6–10 years of experience to own board-level high‑speed electrical design for 1.6T DR8 (200G/lane) OSFP optical modules, from pre‑layout simulations through validation and production support.
Key Responsibilities:
- Own SI/PI design for 1.6T DR8 OSFP module host and line‑side interfaces, including 200G PAM4 lanes, DSP/ASIC interfaces, retimer/gearbox and connector transitions on the module PCB
- Perform pre‑ and post‑layout SI simulations (time and frequency domain) for very high‑speed channels: insertion/return loss, crosstalk, impedance, eye diagrams, COM and bathtub analysis.
- Define PCB stack‑up, materials, via technology, routing rules and design constraints to meet loss budgets and margin targets at 200G per lane within OSFP mechanical constraints.
- Generate transparent SI/PI design guidelines for schematic and layout engineers; review schematics and layout (diff‑pair routing, reference transition