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 senior SI Engineer with 1520 years of experience to lead boardlevel highspeed electrical design and validation for 1.6T DR8 (200G/lane) OSFP optical modules, including technical leadership across multiple projects and mentoring of the SI team.
Key Responsibilities:
- Own SI/PI architecture and strategy for 1.6T DR8 OSFP modules: define channel budgets, interface architectures, and design rules for 200G PAM4 lanes from ASIC/DSP to frontpanel.
- Lead pre and postlayout SI/PI simulations and reviews (Sparameters, eye/PAM4 analysis, COM, crosstalk, jitter, PDN impedance) and signoff multilane channels on dense module PCBs.
- Define PCB stackups, materials (e.g., ultralowloss laminates), via and breakout strategies, connector selections, and routing guidelines to meet performance, cost, and manufacturability targets.
- Drive crossfunctional technical decisions with hardware, optics, mechanical, FW, and test teams, balancing SI/PI requirements against thermal, mechanical, and system constraints.
- Lead lab correlation and validation plans: fixture/board design, TDR/VNA/BERT/oscilloscope measurements, deembedding strategies, and signoff criteria for engineering builds and production.
- Provide technical leadership for SIrelated debug on proto and field issues, driving structured rootcause analysis and design/process improvements across products.
- Establish and maintain companywide SI/PI design methodologies, checklists, and documentation for current and future OSFP/QSFPclass platforms.
- Mentor and coach junior and midlevel SI/hardware engineers; review and approve their simulations, reports, and design decisions.
Required Qualifications:
- B.E/B.Tech or M.E/M.Tech (or equivalent) in Electrical/Electronics Engineering with 1520 years of relevant highspeed SI/PI and boardlevel design experience.
- Deep expertise in very highspeed SerDes (56G, strongly preferred 100G/200G PAM4) including channel modeling, equalization strategies, jitter/crosstalk analysis, and margining.
- Extensive handson experience with leading SI/PI tools (e.g., Sigrity, ADS, HFSS, SIwave, HSPICE or equivalents) and scripting/automation for simulation and report generation.
- Proven track record bringing complex highspeed hardware or optical modules from concept through production, including multiple design spins and volume manufacturing support.
- Strong lab expertise with highbandwidth scopes, VNAs, BERTs, and TDRs, including correlation of measurements to simulations and management of external labs/vendors when needed.
- Demonstrated ability to lead crossfunctional design reviews, influence architecture, and communicate complex SI/PI concepts clearly to both technical and nontechnical stakeholders.
Preferred Qualifications:
- Direct experience with OSFP/OSFPXD/QSFPDD optical transceiver designs at 800G/1.6T or similar datacenter interconnects, including familiarity with copackaged optics or linecard interfaces.
- Knowledge of IEEE 802.3 DR8/FR8/LR8class electrical/optical standards and relevant MSAs/OIF specifications and their implications on channel design and testing.
- Background in EMI/EMC, mechanical and thermal considerations for pluggable modules and how they impact SI/PI tradeoffs.
- Experience managing or technically leading small SI/PI or hardware teams, including setting roadmaps, reviewing performance, and guiding career development.
What we offer
- Competitive salary commensurate with experience
- Comprehensive benefits package including health insurance
- Professional development opportunities and certification support
- Access to cutting-edge technology and cloud platforms
- Collaborative work environment with cross-functional teams
- Lumilens is an equal opportunity employer. All qualified applicants will receive consideration without regard to race, color, religion, gender, identity, orientation, veteran status, disability, or any other legally protected status.
