Jobs at Lightmatter

Conduct reliability and characterization testing on photonic and electronic hardware. Build test stations, write Python automation and instrument drivers, analyze data, present findings, support failure analysis, document root causes, and maintain test procedures and qualification plans in a hands-on lab environment.

Owns end-to-end financial planning for supply chain, products, and revenue at a semiconductor photonics company. Responsibilities include customer-level revenue forecasting, sales pipeline auditing, COGS and inventory modeling, wafer economics, gross margin optimization, foundry capacity planning, EDA and HPC cost modeling, and WIP valuation support. The role partners closely with Sales, Supply Chain, Operations, Engineering, Accounting, and executive leadership.

Own Lightmatter’s digital marketing engine across SEO, AEO, LinkedIn, YouTube, website, paid search, and email. Develop content distribution strategies, improve organic and AI discoverability, run campaigns, manage marketing tools and agencies, establish channel KPIs, analyze competitors, and repurpose technical content. The role partners with marketing, product, engineering, subject-matter experts, and executives to grow visibility and engagement for the company’s AI infrastructure technologies.

Supports new product introduction for advanced computing hardware by developing manufacturing processes, leading pilot builds, creating documentation, conducting DFM reviews, and troubleshooting board-, chassis-, and rack-level systems. Collaborates with hardware and software engineers, suppliers, and contract manufacturers on assembly, testing, validation, root-cause analysis, corrective actions, and production readiness.

Own Lightmatter’s digital marketing engine across SEO, AEO, LinkedIn, YouTube, website, and paid search. Develop content and distribution strategies, improve AI and search discoverability, manage campaigns and HubSpot programs, repurpose technical content, define channel KPIs, analyze competitors, oversee marketing tools and tracking, and coordinate agencies. The role requires strong B2B technology marketing experience, analytics expertise, workflow automation, and hands-on knowledge of SEO and social platforms.

Develops and maintains Python and TCL physical design flows for ASIC and mixed-signal chip tapeout, from synthesis through signoff. Automates flow tasks using AI and LLM tools, builds regression and QoR tracking infrastructure, evaluates EDA capabilities, debugs implementation issues, and supports timing closure, ECOs, and DRC/LVS cleanup. The role also documents methodologies and trains physical design teams.

Support Lightmatter’s Supply Chain Operations team by mapping supply chain checkpoints, identifying bottlenecks, refining agentic tracking processes, gathering workflow data from stakeholders and suppliers, and assisting High Volume Manufacturing programs. The intern will document scalable process improvements and deliver data-driven recommendations for long-term supply chain efficiency.

Automate package layout design workflows using SKILL scripts within Cadence, including layout generation, component placement, routing, design-rule checks, drawing generation, simulation setup, and result analysis. The intern will document scripting processes, maintain automation tools, and collaborate with package design and layout engineers.

Own firmware bring-up and integration for system-level test platforms supporting high-speed optical interconnect products. Build test executives, diagnostic interfaces, datalogging, continuous hardware regression, and board-level functional tests. Lead root-cause investigations, firmware and hardware validation, manufacturing test transfer, documentation, and mentoring. The role requires embedded Linux platform expertise, Python automation, hardware-in-the-loop testing, interface validation, and experience shipping products through NPI gates.

Design and analyze active and passive silicon photonics devices and subsystems. Responsibilities include photonic simulation, inverse design, control algorithm development, fabrication variability assessment, automated testing, data analysis, and model creation based on measurement data. The intern will use tools such as Lumerical, Tidy3D, Cadence, and Python while supporting design-for-test, manufacturing, and experimental methodologies.

Supports supply chain operations and hardware manufacturing programs from NPI through high-volume manufacturing. Responsibilities include supplier execution, master build planning, material availability and Clear-To-Build tracking, BOM and ECO management, PLM/ERP updates, project scheduling, vendor milestone monitoring, and cross-functional coordination among engineering, quality, commercial teams, foundries, OSATs, and contract manufacturers.

Intern will perform layout- and netlist-driven photonic simulation and verification, run Monte Carlo and corner analyses, troubleshoot performance issues, improve photonic integration flows, and contribute to proprietary PDK development. The role requires practical silicon photonics knowledge, Python proficiency, experience with script-based photonic circuit design using tools such as GDSFactory or PhotonForge, and strong collaboration skills.

Engineering interns will support silicon photonics, product testing, analog and mixed-signal design, laser development, systems integration, digital design, verification, physical design, or firmware engineering. Responsibilities may include optical simulation, lab validation, RTL development, ASIC verification, EDA-based physical design, and low-level driver development. Candidates will collaborate on photonic computing hardware from chip-level development through system integration.

Develop RTL and DFT-aware digital designs for advanced ASICs supporting AI and optical computing. Debug complex logic and mixed-signal simulations, integrate silicon photonics with digital accelerators, and collaborate across architecture, verification, physical design, photonics, analog, and software teams. Produce design specifications and documentation while managing implementation risks to deliver high-performance, low-power designs on schedule.

Develop RTL and DFT-aware digital modules for advanced AI accelerator ASICs. Debug complex logic and mixed-signal simulations, integrate silicon photonics with digital designs, and collaborate across architecture, verification, physical design, analog, photonics, and software teams. Drive high-performance, low-power implementations through tape-out, document functionality and timing, and manage technical risks and schedules.

Develop RTL and digital accelerator designs for advanced ASICs supporting optical computing and AI infrastructure. Responsibilities include DFT-aware SystemVerilog development, complex logic and mixed-signal simulation debugging, photonic technology integration, cross-functional collaboration, design documentation, and managing RTL implementation for high-performance, low-power silicon designs.

Photonics Characterization Intern will perform electro-optic testing and characterization of silicon photonics chips and components, including micro-rings, phase shifters, and Mach-Zehnder interferometers. The role involves operating optical and semiconductor test equipment, designing testing protocols, analyzing results, and developing automated test systems and instrument interfaces using Python. Candidates will work independently in a laboratory environment to solve complex technical problems and translate data into actionable strategies.

Manage People Operations and Total Rewards processes, including onboarding, offboarding, contractor administration, leave, benefits, employee support, Workday data audits, and workforce reporting. Partner with Talent Acquisition, Finance, IT, Payroll, and vendors to ensure compliance, accuracy, and a strong employee experience. Use AI tools to automate workflows and improve reporting while protecting confidential employee data.

Lead machine learning infrastructure research for photonics-enabled AI systems. Build performance models for training and inference workloads, design rack-scale reference platforms, publish research and technical content, advise cross-functional teams, and lead a small team of machine learning engineers. The role requires deep expertise in AI systems, compute and networking technologies, performance evaluation, large language models, and academic research.

Owns operational programs for photonic hardware from NPI through high-volume manufacturing. Responsibilities include master build planning, multi-tier material readiness, Clear-To-Build tracking, supplier and contract manufacturer execution, Statement of Work governance, milestone and risk management, BOM administration, ECO routing, PLM workflows, and executive status reporting across engineering, quality, commercial, foundry, OSAT, and manufacturing teams.