The Product Engineer role is pivotal to Lightmatter’s mission, sitting at the center of product delivery and operational excellence. This position offers a unique opportunity for end-to-end ownership, where you will define the product engineering landscape from the ground up and drive the strategic direction for our hardware portfolio. You will collaborate with cross-functional teams (design, foundry, packaging, test, validation, reliability) to optimize manufacturing flows, improve yield and quality, and reduce costs. The role's focus areas include: optimizing Yield & Quality, implementing DFx principles, and managing the product from initial silicon to high-volume manufacturing (HVM). The core responsibilities are specifically centered on optimizing manufacturing flows, yield Improvement, and Test Point Optimization.

• Strategic Ownership: Own the product's success by managing yield and quality indicators from first silicon to high-volume manufacturing (HVM).
• Manufacturing Excellence: Define manufacturing and test strategies, including DFT implementation, test hardware specs, and test program creation.
• Yield & Cost Optimization: Drive continuous improvement in quality, yield, and cost by reducing test time, eliminating test sockets, closing test holes (DPM reduction), and increasing yield through root cause analysis with cross-functional teams (design, fab, packaging).
• Hands on leadership: Debug test, yield, and power/performance issues.
• Guiding Light: Lead multi-disciplinary teams (Design, Foundry, Packaging, Supply Chain, etc.) to resolve product issues and continuously improve team tools and methods.

Qualifications

• Master’s in Computer Science,Electrical Engineering, Physics, Material Science or a related field
• A minimum of 5+ years experience in semiconductor industry as a product engineer, with a cumulative of 12 years of relative industry experience
• Experience developing DFT strategy
• Experience developing test plans
• Familiarity with advanced packaging flows
• Familiarity with ATE Test area equipment and methodology
• Experience partnering with OSATs to develop manufacturing test flows for CMOS or Optical transceiver products
• Excellent communication skills with ability to present complex technical information clearly and concisely
• Demonstrated ability to influence senior company leadership and partner with vendors and customers
• Familiarity with statistical analysis & data acquisition tools such as JMP, Snowflake

Preferred:

• Experience partnering with a OSAT to develop manufacturing test flows for Co-Packaged Optics technology
• Programming or scripting: Python, C, Java, Ruby, SQL, or shell scripting 

The salary range for this position reflects two distinct internal levels. The lower half of the range applies to candidates meeting the core requirements, while the upper half is reserved for those who bring the additional specialized experience or extensive years of experience required for our senior-level designation.

This unique opportunity focuses on defining the control plane architecture for next-generation photonic interconnect products and implementing active laser control and stabilization algorithms. You will leverage your proven history of shipping embedded systems at scale to deliver products that enable extreme-scale artificial intelligence computing clusters. Your expertise will make a profound and visible impact on the business by directly enabling the next generation of computing technology.

Responsibilities

• Collaborate across a multidisciplinary team including Photonic, Analog, Digital, Systems and Network experts to define control plane architecture for Lightmatter's photonic interconnect products.
• Define diagnostics and monitoring architecture for photonic transceivers.
• Implement active laser control and stabilization algorithms in collaboration with a cross-functional design team.
• Integrate with DataCenter administration capabilities using environments such as CMIS, OpenBMC and DMTF.
• Debug and troubleshoot embedded systems using tools such as GDB, JTAG, and logic analyzers.
• Debug and troubleshoot lasers using optical test and measurement equipment.
• Participate in customer engagements to gather requirements and usability criteria.

Qualifications

• BS and 8+ years of experience, or MS and 6+ years of experience.
• Degree in Computer Science, Electrical Engineering, Robotics, or a related technical field.
• Proven history of shipping embedded software in customer-facing devices at-scale.
• Strong understanding of hardware-software integration.
• Practical knowledge of communication and control in embedded systems, peripherals, and buses.
• Experience with developing commercial/enterprise-level software and firmware on Linux.
• Experience with Git and CMake for building and managing software projects.
• Hands-on experience designing, simulating, or deploying control of autonomous systems.

Preferred Qualifications

• Proficiency with Python or C++.
• Familiarity with debugging tools such as GDB, JTAG, and logic analyzers.
• Experience developing firmware for photonic transceivers or similar systems.
• Experience with environments such as CMIS, OpenBMC and DMTF.
• Experience with optical communication systems and technologies.
• Knowledge of laser physics and control techniques.
• Has experience leading small teams and mentoring junior engineers.
• Familiarity with optical test and measurement and methodologies for characterizing optical components and systems.

About this Role

You will be focused on architecting wafer, package and system level characterization and test strategies of Lightmatter’s novel Silicon Photonic product line. As part of this role you will have the ability to directly influence the design and development of Lightmatter silicon photonics technologies. You will be part of a growing interdisciplinary team with a lot of opportunities to learn and make a big impact.

Responsibilities

• Work directly with the architecture and design teams to understand the technology and conceptualize characterization and test techniques targeting feedback for design model validations.
• Architect test concepts, test platforms, design for test rules, and provide feedback early on during the technology concept phase.
• Create detailed test plan documentation and ensure timely execution.
• Define, develop, and setup of wafer, package and system level tests for Lightmatter silicon photonics products. 
• Develop test software to enable test execution, data analysis, and parameter extraction.
• Work with vendors to specify and procure test equipment.
• Setup and operate a range of optical equipment such as tunable lasers, power meters, polarization synthesizer, OBR/OVA, and high-speed test equipment.
• Engage with silicon and platform validation teams and bridge any gaps between test and validation teams.
• Work with OSAT teams to define, validate, and refine test techniques for high volume manufacturing.
• Work with the reliability team for pre and post-stress test needs.
• Keep up to date with the latest developments in Silicon Photonics technology and testability.

Requirements:

• Master’s in Photonics, Physics, Electrical Engineering or a related field
• A minimum of 8+ years of proven experience in silicon photonics test development 
• Proven industrial experience in supporting new product introduction and volume production  
• Deep understanding of Silicon Photonics components and circuits
• Experience working with design teams to define test cells for model feedback and validation 
• Hands on experience in characterization and test of photonics components and circuits 
• 3+ years of direct experience in high-speed photonic device test, system link bring-up, and familiar with test equipment such as AWG, DCA, DSO, PNA, LCA
• Experience in test system automation using Python
• Strong analytical and problem-solving skills to identify and solve issues during the testing process
• Ability to convey complex technical concepts to both technical and non-technical stakeholders 

Preferred Qualifications:

• PhD in Photonics, Physics, Electrical Engineering or a related field
• 2+ years of photonic component or circuit design experience is highly preferred

About this Role

We're looking for a Senior Data Systems Engineer who bridges the gap between hardware domain expertise and modern data infrastructure. You won't just build pipelines — you'll work directly with foundries, OSATs, test engineers, and validation teams to understand what the data means, define how it should flow, and build the platform that makes AI-driven decisions possible across 13+ active hardware programs.

This is not a typical data engineering role. The right person has a background in semiconductor manufacturing, photonics, hardware test/validation, or a related hardware discipline — and a strong pull toward data systems, process optimization, and automation. You understand that the hardest part of a data platform isn't the code; it's knowing which data matters and why.

What You'll Do

Program Data Onboarding & Vendor Engagement

• Engage directly with foundries, OSATs, and internal engineering teams to align on data formats, delivery mechanisms, and quality standards for new programs
• Own the data onboarding lifecycle for programs ramping to High Volume Manufacturing (HVM)
• Identify gaps in data coverage across the pipeline: design, foundry, test/validation, photonics characterization, packaging/assembly, and system-level validation
• Influence external and internal teams to adopt scalable, platform-compatible data practices — this is hands-on stakeholder work, not email coordination

Data Platform Engineering

• Design, build, and maintain data pipelines that ingest, transform, and deliver hardware data from wafer-level test through system validation
• Build and maintain data models in dbt on Snowflake that serve downstream analytics, reporting, and AI/ML workflows
• Develop and operate orchestration workflows (Dagster) for reliable, observable data delivery
• Implement data quality checks, monitoring, and alerting to ensure platform reliability across production programs

Performance Metrics & Reporting

• Build performance metrics pipelines that translate raw hardware data into actionable insights for engineering and program teams
• Own stakeholder reporting and deliver training for teams onboarding to platform tools (Snowflake, Sigma, custom dashboards)
• Support AI/ML workflows by ensuring the data foundation is clean, structured, and reliable

Platform Improvement & Tooling

• Contribute to platform infrastructure: CI/CD, RBAC, cost optimization, self-service tooling
• Participate in sprint ceremonies, contribute to architectural decisions, and help shape the team's technical roadmap
• Mentor junior team members on both data engineering practices and hardware domain context

What You Bring

Required

• Bachelor’s Degree in Photonics, Data Engineering, Electrical Engineering or a related field
• 8+ years of professional experience in data engineering, process engineering, test engineering, or a related technical role in semiconductor, photonics, or hardware manufacturing
• Proficiency in Python and SQL
• Experience with Snowflake, dbt, Dagster/Airflow, or similar modern data stack components
• Experience working with data for hardware test, manufacturing, or characterization systems
• Demonstrated ability to work cross-functionally with technical teams and external partners (vendors, foundries, or OSATs) to define data requirements and influence practices
• Strong analytical thinking — you can look at a dataset and understand what it means in the physical world, not just how to transform it

Preferred

• Master’s or PhD in Physics, Electrical Engineering, Photonics, or a related field with 4+ years of experience
• Background in silicon photonics, photonic integrated circuits (PICs), or optical systems
• Experience with High Volume Manufacturing (HVM) ramps or new product introduction (NPI) data workflows
• Familiarity with semiconductor test data formats (STDF, WAT, parametric data)
• Experience building data quality frameworks or monitoring systems
• Experience with AI/ML tools applied to manufacturing or engineering data

About this Role

We're looking for a Senior Data Systems Engineer who bridges the gap between hardware domain expertise and modern data infrastructure. You won't just build pipelines — you'll work directly with foundries, OSATs, test engineers, and validation teams to understand what the data means, define how it should flow, and build the platform that makes AI-driven decisions possible across 13+ active hardware programs.

This is not a typical data engineering role. The right person has a background in semiconductor manufacturing, photonics, hardware test/validation, or a related hardware discipline — and a strong pull toward data systems, process optimization, and automation. You understand that the hardest part of a data platform isn't the code; it's knowing which data matters and why.

What You'll Do

Program Data Onboarding & Vendor Engagement

• Engage directly with foundries, OSATs, and internal engineering teams to align on data formats, delivery mechanisms, and quality standards for new programs
• Own the data onboarding lifecycle for programs ramping to High Volume Manufacturing (HVM)
• Identify gaps in data coverage across the pipeline: design, foundry, test/validation, photonics characterization, packaging/assembly, and system-level validation
• Influence external and internal teams to adopt scalable, platform-compatible data practices — this is hands-on stakeholder work, not email coordination

Data Platform Engineering

• Design, build, and maintain data pipelines that ingest, transform, and deliver hardware data from wafer-level test through system validation
• Build and maintain data models in dbt on Snowflake that serve downstream analytics, reporting, and AI/ML workflows
• Develop and operate orchestration workflows (Dagster) for reliable, observable data delivery
• Implement data quality checks, monitoring, and alerting to ensure platform reliability across production programs

Performance Metrics & Reporting

• Build performance metrics pipelines that translate raw hardware data into actionable insights for engineering and program teams
• Own stakeholder reporting and deliver training for teams onboarding to platform tools (Snowflake, Sigma, custom dashboards)
• Support AI/ML workflows by ensuring the data foundation is clean, structured, and reliable

Platform Improvement & Tooling

• Contribute to platform infrastructure: CI/CD, RBAC, cost optimization, self-service tooling
• Participate in sprint ceremonies, contribute to architectural decisions, and help shape the team's technical roadmap
• Mentor junior team members on both data engineering practices and hardware domain context

What You Bring

Required

• Bachelor’s Degree in Photonics, Data Engineering, Electrical Engineering or a related field
• 8+ years of professional experience in data engineering, process engineering, test engineering, or a related technical role in semiconductor, photonics, or hardware manufacturing
• Proficiency in Python and SQL
• Experience with Snowflake, dbt, Dagster/Airflow, or similar modern data stack components
• Experience working with data for hardware test, manufacturing, or characterization systems
• Demonstrated ability to work cross-functionally with technical teams and external partners (vendors, foundries, or OSATs) to define data requirements and influence practices
• Strong analytical thinking — you can look at a dataset and understand what it means in the physical world, not just how to transform it

Preferred

• Master’s or PhD in Physics, Electrical Engineering, Photonics, or a related field with 4+ years of experience
• Background in silicon photonics, photonic integrated circuits (PICs), or optical systems
• Experience with High Volume Manufacturing (HVM) ramps or new product introduction (NPI) data workflows
• Familiarity with semiconductor test data formats (STDF, WAT, parametric data)
• Experience building data quality frameworks or monitoring systems
• Experience with AI/ML tools applied to manufacturing or engineering data

We are hiring a Mixed-Signal Architecture Validation Engineer to partner with the internal engineering team at Lightmatter to deliver groundbreaking products to market. In this role, you will require a solid understanding of Lightmatter products, mixed-signal digital architecture, process technology, chip design, and clear communication skills.

In this role, you will be validating the architecture of the mixed-signal circuits that enable a groundbreaking photonic-based communication fabric. Your work will enable not only the low-level AMS/photonic devices but also the necessary interfaces with firmware and software. You will also influence product definition and technological roadmaps, as well as suitable design and verification methodologies.

You will report directly to the Head of Product Validation, but you will also work closely with our digital, analog, photonic, and software teams. We are particularly looking for someone with expertise in architecting mixed-signal circuits to enable high-speed AMS circuits, with a strong preference for someone with experience in photonic circuits.

Join a tight-knit team where each individual’s contributions directly influence the success of the company and product. You'll have the opportunity to build a new kind of data center from the ground up and to solve groundbreaking challenges along the way. Work with people who love to build and who thrive in technically diverse environments where great ideas are prioritized.

Responsibilities

• Own mixed-signal architecture validation for Lightmatter’s Passage product line. Work closely with the rest of the architecture team, chip design team, and the software team.
• Influence the mixed-signal architecture from initial concept through high-volume production.
• Validate and specify system-level mixed-signal designs, integrating complex AMS and photonic circuits. These circuits include high-speed drivers and receivers, SerDes, ADCs/DACs, digital controllers, and photonic modulators and detectors.
• Work closely with test and validation engineers to validate hardware against simulation predictions.
• Collaborate with DV team to translate pre-silicon verification into post-silicon validation
• Support architectural-level firmware validation
• Author, review, and validate architectural specifications and test methodologies.
• Identify improvements and potential pitfalls (including mitigation strategies) regarding the execution of the proposed architectures.

Qualifications

• MS in Electrical Engineering or a related field with 7+ years of relevant experience.
• In-depth knowledge of design flows for AMS electronics, preferably on photonic communication channels.
• Proven track record of delivering successful high-volume silicon to market, and a thorough understanding of the silicon product development flow.
• In-depth knowledge of mixed-signal circuit design in a high-speed analog/photonic link, including device bring-up, control, and digital signal processing.
• Hands-on experience with lab instruments and test setups.
• Demonstrated strong problem-solving skills, specifically for problems that do not have obvious solutions.
• Ability and desire to collaborate in a cross-disciplinary team.

Preferred Qualifications

• Understanding of SerDes PCS layer and equalization, along with forward error-correction schemes.
• Power user of development tools, including AI agents, CAD tools, SPICE simulators, IBIS-AMI simulators, and programming languages (e.g., MATLAB or Python).
• Experience in optical link bring-up and debug.

In this role, you will design, develop, and build photonic test systems that are critical to the characterization and validation of our products. You will collaborate closely with device, hardware, software, and digital and analog design teams to support the end-to-end development, validation, and qualification of photonic systems and their key components.

Join a tight-knit team where each individual’s contributions directly impact the success of the company and our innovative products. At Lightmatter, you’ll have the opportunity to work with people who love to build and thrive in technically diverse environments where great ideas are valued and prioritized.

We are hiring a Photonics Hardware Validation Engineer to join our Validation team to drive photonics testing, characterization and validation of our silicon photonics-based optical Interconnect Products.

Responsibilities

• You will need to understand our chip specifications well so that you can take responsibility for chip bring-up, testing, and validation of our next-generation Optical Interconnect products. This includes supporting the development of chip validation plans aligned to product specifications, xDVT, and interoperability testing.
• You will be required to contribute to test plan development, test bench configuration planning, setup of lab test equipment, and troubleshooting of validation setups to enable successful chip bring-up and testing.
• You will work within the product validation team on electro-optic, link-level testing in our lab using industry-standard practices and equipment.

Qualifications

• Bachelor’s degree in Electrical Engineering, Physics, or a related field with a minimum of 12 years of relevant experience, or a Master’s degree with a minimum of 8 years of relevant experience.
• Experience in the data communications field, specifically in electro-optic link-level testing and characterization in a lab environment.
• Familiarity with PCB design, including hardware testing and debugging of electro-optic circuits.
• Ability to work closely with Design Engineers, Software Engineers, and broader cross-functional teams to quickly gain knowledge of Lightmatter products and drive execution of chip bring-up and validation in our lab.
• Hands-on experience with standard bench test equipment for data communications, including electro-optic link testing and characterization.
• Basic scripting skills for automation of lab tests including analysis of results and report generation.
• Solid understanding of electrical and optical blocks in transmitters and receivers to enable efficient chip bring-up and link testing.
• Ability to troubleshoot and debug the electrical optical building blocks in a transceiver to triage bugs and root-cause performance gaps.

Preferred Qualifications:

• PhD is a plus
• Experience with high-speed data communication systems, including NRZ and PAM4 signaling.
• Familiarity with industry standards such as IEEE, OIF-CEI, or similar for data communication systems.
• Proficiency in Python, MATLAB, or similar tools for scripting and automation.
• Strong documentation skills to develop clear test plans, reports, and technical presentations.
• Prior experience in leading or mentoring junior engineers in lab validation and testing workflows.

We are hiring a Chip Firmware Validation Engineer to help us build the next generation of photonic AI processors and interconnects.

In this role, you will be responsible for developing and validating the device software and firmware stack for Photonic Compute and Photonic Interconnect products. You will collaborate with other software and hardware systems teams to develop firmware, conduct validation and reliability testing, perform data analysis, and execute further software stack optimization.

Join a tight-knit team where each individual’s contributions directly impact the success of the company and our innovative products. At Lightmatter, you’ll have the opportunity to work with people who love to build and who thrive in technically diverse environments where great ideas are valued and prioritized.

Responsibilities

• Collaborate across a multidisciplinary team including photonics, analog, digital, systems, and network experts to define the control architecture for Lightmatter's photonic interconnect products.
• Drive the software and firmware validation testing for our photonic products.
• Debug and troubleshoot embedded systems using tools such as GDB, JTAG, and logic analyzers.
• Participate in defining product architecture and validation test plans definition to gather requirements and usability criteria.

Qualifications

• BS in Electrical Engineering, Computer Science, or a related field with 5+ years of experience in ASIC firmware validation.
• Strong understanding of hardware-software integration.
• Practical knowledge of communication and control in embedded systems, peripherals, and buses.
• Experience in embedded software development.
• Experience developing commercial or enterprise-level software and firmware on Linux.
• Experience with Git and CMake for building and managing software projects.
• Hands-on experience with data gathering, analysis, and reporting.
• Proficiency with Python, C, C++ and MongoDB.

Preferred Qualifications:

• Experience with Snowflake reporting software
• Experience with environments such as CMIS and OpenBMC, and familiarity with validation and reliability/FIT(Failure in Time) testing.
• Familiarity with optical test, measurement and methodologies for characterizing optical components and systems.
• Experience developing firmware for photonic transceivers or similar systems.