Principal Silicon Photonics Design Engineer

What You'll Do

• Lead the architecture, design, and optimization of silicon photonic building blocks and subsystems (Tx/Rx).
• Design and analyze components such as modulators (MRM, MZI), photodetectors, waveguides, couplers, splitters, and heaters.
• Perform optical, electrical, and thermal simulations using industry-standard tools.
• Drive PDK evaluation, design rule compliance, and layout-aware optimization.
• Support chip tape-out, lab characterization, and correlation between simulation and measurement.
• Own design documentation, specifications, and design reviews.
• Mentor junior engineers and contribute to best-practice design methodologies.
• Collaborate with system, packaging, and test teams to ensure end-to-end performance.
• Required Qualifications: MSc or PhD in Electrical Engineering, Photonics, Applied Physics, or a related field. 5+ years of experience in silicon photonics or integrated photonic design.
• Strong background in optical waveguides, modulators, photodetectors, and PIC integration.
• Hands-on experience with simulation tools such as Lumerical, IPKISS, Photon Design, or equivalent.
• Solid understanding of CMOS-compatible fabrication processes.
• Experience with multi-lane optical transceivers and high-speed optical links is a strong plus.
• Proven ability to take designs from concept through tape-out and measurements.
• Strong analytical, documentation, and communication skills.
• We Offer: Base Salary Equity Annual Bonus Plan Medical Insurance Information about our benefits you can find here: https://gf.com/careers/opportunities-in-europe/