Jobs at Lightmatter

Design, layout, simulate, and test silicon photonic devices for integrated laser systems. Collaborate with packaging, systems, and characterization teams to validate devices, troubleshoot performance across manufacturing variability, and publish results. Support test plan development, foundry integration, and cross-functional product requirements.

Lead development of the internal photonics PDK: create Python-based pcells, build and verify compact behavioral models, automate parameter extraction from FDTD/FEM solvers, correlate models with lab measurements, implement CI/regression tests, and own netlist extraction and connectivity logic for circuit-level simulation.

Responsible for timing constraints development, STA and timing closure on CMOS technologies, driving timing sign-off, analyzing power/performance tradeoffs, and running full-chip STA.

The Staff Physical Design Engineer will implement digital blocks, ensure timing closure and power integrity, and perform physical verification for ASICs.

Lead system-level electrical design for silicon-photonics AI accelerators: define requirements, design power/memory/interconnect circuits, oversee PCB layout and manufacturability, validate and qualify boards in lab, integrate cross-functionally, support contract manufacturing and vendor selection.

Develop and extend device software and firmware for photonic AI processors, collaborating with multidisciplinary teams on system integration and control mechanisms.

Lead design of high-speed analog/mixed-signal transceivers for silicon photonics systems. Drive block specifications with cross-functional teams, run post-layout and mixed-signal simulations, validate circuits in lab, define test plans, document designs, and mentor junior engineers.

The Design Verification Engineer will rigorously verify designs using UVM techniques, collaborating closely with digital and analog design experts, while defining DV methodologies and ensuring quality tapeouts.

The Sr./Principal Mixed-Signal Digital Architect will design digital circuits for photonic-based communication, collaborate with teams, and lead product development.

The Product Engineer will optimize manufacturing flows, manage yield and quality, lead cross-functional teams, and develop test strategies for semiconductor products.

Develop high-speed analog transceiver solutions, design analog/mixed-signal blocks, collaborate across teams, and validate circuit performance in the lab.

Lead technical writing for customer-facing content, ensuring quality and technical accuracy while collaborating with cross-functional teams. Manage documentation workflows and innovate with AI tools.

The Principal Machine Learning Infrastructure Researcher will drive innovation in hardware systems for AI, collaborate on designs, publish research, and lead a team of engineers.

The Photonics Technical Lead develops scalable laser solutions for silicon photonics, collaborating with cross-functional teams and overseeing product design and validation.

Lead system-level electrical design for silicon photonics AI accelerators: define requirements, design power/memory/interconnect circuits, select components, oversee PCB layout and manufacturability, validate in lab, integrate cross-functionally, support manufacturing, and research new components and processes.