Role Overview
You will design high-speed silicon photonic integrated circuits operating at the limits of bandwidth and integration, and take them from concept → tapeout → silicon validation.
This role is suitable for strong PhD graduates through early-career engineers (~0–5 years experience) who want to work on real, production-bound systems, not just simulations.
Roles & Responsibilities
Design and optimize silicon photonic devices and circuits, including:
High-speed modulators (MZI, ring, advanced structures)
Photodetectors and receiver building blocks
Passive components (couplers, filters, routing)
Perform multi-domain simulations (EM, circuit, thermal) to meet targets in:
Bandwidth (200G/lane+)
Insertion loss, extinction ratio, efficiency
Implement PIC layouts (GDS) using foundry PDKs and support tapeouts
Co-design with electronics and packaging teams for CPO/NPO systems:
RF effects, parasitics, signal integrity, and thermal constraints
Support silicon bring-up and characterization:
Correlate measurement vs simulation
Drive design iterations and improvements
Contribute to design libraries, modeling, and methodology development
Requirements
Education
PhD in Electrical Engineering, Physics, or related field (silicon photonics or closely related area)
Experience
0–5 years of relevant experience (including fresh PhD graduates)
Technical Skills
Experience in design and simulation of silicon photonic devices or PICs
Strong understanding of guided-wave optics and device physics
Familiarity with tools such as Lumerical, COMSOL, or equivalent
Implementation Skills
Exposure to PIC layout and tapeout flows (PDK, DRC/LVS)
System Awareness
Basic understanding of optical communication systems and/or RF effects
Nice to Have
Experience with high-speed devices (>100 GHz bandwidth or equivalent)
Exposure to CPO/NPO or optical transceiver architectures
Familiarity with SiPh + III-V integration
Experience with inverse design / adjoint methods (e.g., Meep)
Why Join Us
Work on real products at 200G/lane+, not just research prototypes
Direct impact on AI infrastructure and hyperscale systems
Fast iteration cycles from design → silicon → system
High ownership early in your career
Comprehensive benefits package including health insurance
Collaborative environment with world-class engineering and R&D teams
Skills Required
- PhD in Electrical Engineering, Physics, or related field (silicon photonics or closely related area)
- 0-5 years of relevant experience (including fresh PhD graduates)
- Experience in design and simulation of silicon photonic devices or PICs
- Strong understanding of guided-wave optics and device physics
- Familiarity with tools such as Lumerical or COMSOL (or equivalent)
- Exposure to PIC layout and tapeout flows (foundry PDK, GDS, DRC/LVS)
- Basic understanding of optical communication systems and/or RF effects
- Experience with high-speed devices (>100 GHz bandwidth or equivalent)
- Exposure to CPO/NPO or optical transceiver architectures
- Familiarity with SiPh + III-V integration
- Experience with inverse design / adjoint methods (e.g., Meep)
What We Do
Lumilens addresses the red hot market for AI data center infrastructure by designing, manufacturing and selling photonic interconnect solutions. We design and use custom robotics + AI in our factories to more efficiently build our products. Lumilens is backed by top-tier venture capital investors including Mayfield and Spark Capital.
