Jobs at Lightmatter

Lead verification and characterization of high-speed electro-optic links across silicon and system programs. Responsibilities include lab debugging, electrical and optical channel modeling, link-budget ownership, eye-diagram and BER analysis, silicon bring-up, signal-integrity root-cause investigations, architecture tradeoff guidance, automation development, and engineering mentorship. The role requires deep expertise in high-speed SerDes, photonics, measurement systems, and modeling tools.

Drive the micro-architecture of a photonic communication fabric. Propose photonic device designs, estimate performance/power/area, collaborate with analog and photonic engineers, and author and validate architectural specifications for Passage.

Leads system-level electrical design for silicon photonics AI accelerators and interconnect products. Responsibilities include defining hardware requirements, designing power, memory, and high-speed circuits, selecting components, overseeing PCB layouts, validating boards in the lab, ensuring manufacturability, integrating cross-functional systems, and supporting contract manufacturing. The role requires taking products from concept through production and collaborating with mechanical, software, IC, packaging, and supply partners.

Design and model silicon photonic and analog sub-circuits for laser products and optical interconnects. Build compact and behavioral models incorporating fabrication variability, dispersion, thermal effects, and nonlinear properties. Calibrate models using optical solvers, PDKs, and silicon measurements; develop circuit simulations for lasers, modulators, filters, receivers, and controls. Perform corner, Monte Carlo, margin, and yield analyses, and validate models against production silicon data.

Develop and maintain photonics Process Design Kits, including Python-based layout libraries, compact behavioral models, test structures, and automated verification pipelines. Validate models against silicon measurements through data fitting and statistical analysis. Collaborate with multidisciplinary engineering teams to support large-scale photonic integrated circuit tape-outs. The role requires advanced photonic device physics, circuit simulation, Python programming, layout automation, and experience with foundry PDKs and design verification.

Design and own firmware test automation frameworks, hardware-in-the-loop infrastructure, CI/CD integration, diagnostics, telemetry, and test reporting for photonic hardware. Debug failures across firmware, boards, instruments, fixtures, and test code. Define test strategies, improve framework reliability, support embedded systems interfaces, participate in design reviews, document architecture, and mentor engineers.

Lead product definition, positioning, partnerships, customer design wins, rollouts, pricing, forecasting, and lifecycle management for silicon photonics products. The role focuses on Lightmatter’s Passage interconnect platform, evaluation systems, and photonics-enabled data center solutions, collaborating across engineering, sales, operations, finance, customers, and executives from early development through volume production and end-of-life.

Own the architecture and development of firmware test automation frameworks, hardware-in-the-loop infrastructure, CI/CD integration, diagnostics, telemetry, and test reporting for photonic hardware. Debug failures across firmware, boards, instruments, fixtures, and test software. Define test strategies, improve framework reliability, participate in design reviews, integrate embedded management interfaces, and mentor engineers. The role requires strong Python, embedded C/C++, CI/CD, hardware testing, and automation architecture experience.

Lead verification and characterization of high-speed electro-optic links across silicon and system programs. Perform lab measurements, model electrical and optical channels, own link budgets and verification methodology, and debug signal integrity issues involving eye diagrams, BER, jitter, equalization, and channel impairments. Support silicon bring-up, influence architecture decisions, develop automation tools, and mentor engineers.

Lead hardware bring-up and automated system-level testing for photonic IC products from evaluation through high-volume manufacturing. Responsibilities include ATE hardware integration, electrical bring-up, supplier debugging, test software development in Python or C/C++, power-sequence validation, protocol testing, firmware diagnostic integration, and lab instrumentation control. The role collaborates with IC design, DFT, and firmware teams to isolate silicon and board-level issues.

Drives hardware systems program execution across electrical, mechanical, and systems engineering from design through production. Owns integrated schedules, resource planning, dependencies, material flow, supplier coordination, budgets, risks, and cross-functional communication. Coordinates with contract manufacturers, PCB fabricators, assembly houses, supply chain, finance, engineering teams, and executives while establishing lightweight program management processes in a fast-changing environment.

Designs and maintains software automating photonic chip bring-up, characterization, and production testing across bench and ATE environments. Develops test methods, test flows, instrument controls, data pipelines, and hardware integrations. Collaborates with hardware, characterization, and manufacturing teams, debugs hardware/software issues, supports test releases, and mentors engineers while owning test software architecture for product lines.

Design and maintain software that automates photonic chip bring-up, characterization, validation, and production testing across laboratory and ATE environments. Develop test methods, test flows, instrument controls, data pipelines, and hardware integrations. Debug hardware-software issues, support test releases, collaborate with hardware and manufacturing teams, and mentor engineers while owning test software architecture.

Designs and maintains automated hardware test software for photonic chips across bench-top, wafer, and automated test equipment environments. Responsibilities include developing test methods and flows, controlling instruments, integrating probers and embedded systems, building data pipelines, debugging hardware/software interactions, supporting releases, and collaborating with hardware, characterization, and manufacturing teams. The role also involves test architecture ownership, mentoring engineers, and hands-on laboratory work.

Own the digital architecture of Lightmatter’s Passage photonic computing product from concept through high-volume production. Architect system-level digital designs integrating analog, mixed-signal, and photonic circuits, including DSP, FEC, CRC, stabilization, tuning, and adaptation. Collaborate with chip design, RTL, verification, firmware, test, validation, product, and applications teams. Develop specifications, validate prototypes against simulations, support hardware bring-up, and create customer-facing datasheets and reference designs.

Designs and validates end-to-end electro-optic systems for high-volume photonics products. Responsibilities include system modeling with Cadence, VPI Photonics, and Keysight ADS; co-designing silicon photonic devices; developing high-speed RF experiments; testing optical modulators and receivers; analyzing performance, power, and production requirements; and collaborating with electronics and photonics engineering teams.

Develop embedded firmware and control software for photonic transceiver lasers, including stabilization algorithms, diagnostics, telemetry, monitoring, hardware bring-up, and automated testing. Collaborate with photonic, analog, digital, and systems engineers while debugging embedded systems and integrating management interfaces such as CMIS, OpenBMC, and DMTF standards. The role requires C/C++ and Python expertise, hardware-software integration, lab testing, and ownership of production-ready firmware components.

Conduct electro-optic testing and characterization of silicon photonics chips and components, including micro-rings, phase shifters, and Mach-Zehnder interferometers. Operate optical and semiconductor test equipment, design testing protocols, and develop automated testing systems using Python. Analyze experimental data, solve complex technical problems independently, and translate findings into actionable strategies in a photonics laboratory environment.

Provides technical leadership for hardware systems developing silicon photonics-based AI accelerators and interconnect platforms. Owns multiple hardware projects from concept through production, including PCBA definition, system integration, verification, validation, documentation, and production release. Collaborates across electrical, mechanical, packaging, firmware, photonics, software, and IC engineering teams while mentoring engineers and driving technology roadmaps. Requires deep expertise in VRMs, high-speed SerDes, and major hardware interfaces.

Own end-to-end simulation, co-design, and laboratory verification of photonic-electronic links. Develop multi-physics optical and analog models, perform corner, Monte Carlo, and PVT analyses, create link budgets, and correlate simulations with silicon measurements. Partner with photonic and analog circuit teams on architecture, specifications, interface requirements, and corrective design actions. The role requires high-speed optical lab expertise, silicon photonics experience, and proficiency in photonic, mixed-signal, and Python-based simulation workflows.