Jobs at Lightmatter

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.

Lead DFT insertion and ATPG for ASIC designs, perform post-silicon bring-up and ATE test program debug, script and automate DFT/ATPG flows, interface with physical design and RTL teams, and support synthesis through place-and-route timing closure and tape-out signoff.

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.

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.

Lead implementation of complex digital blocks from synthesis through physical verification on advanced nodes (3nm). Drive timing closure, power and EM/IR analysis, full-chip floorplanning, IO and clock distribution, DRC/LVS cleanup, ECOs, and collaborate with EDA vendors. Automate and customize flows using Tcl/Python/Shell; support tape-out and photonics integration.

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 role involves architecting digital circuits for mixed-signal and photonic systems, collaborating with teams to design and validate high-speed architectures, and ensuring product readiness for market.

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.

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

Design, layout, simulate, and test silicon photonic devices and integrated laser systems. Collaborate with packaging, systems, and characterization teams to validate performance, troubleshoot issues, optimize for manufacturing variability, and publish/present novel photonics results at conferences.

Define micro-architecture for a photonic communication fabric, propose device designs (modulators, receivers, lasers, amplifiers), provide performance/power/area estimates, collaborate with photonic and analog engineers, and author and validate architectural specifications.

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.

Design and implement wafer- and package-level ATE test solutions for silicon photonics products. Develop characterization and manufacturing test plans, debug failures with cross-functional teams, partner with OSATs and foundries, optimize yield and test time for HVM, and write/maintain test scripts and tools to support production and customer deployment.

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

Define and document analog/mixed-signal architecture for high-speed (50G+) optical transceivers and photonic interconnects. Propose AMS circuit blocks, estimate performance/power/area, collaborate with analog, digital, photonics and software teams, validate specifications, and represent technical leadership externally.

Develop and validate electro-optic electrical-optical-electrical links for Passage™. Model systems with photonics/analog simulators, co-design analog and photonic devices, run RF/mm-wave experiments, validate models, and author architectural specifications.

Define and specify system-level digital architectures for high-speed mixed-signal photonic communication chips. Collaborate with digital, analog, photonic, firmware, and test teams to enable RTL/DV implementation, validate hardware against simulations, and author architectural specifications from concept to production.

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.

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.