Lightmatter is leading the revolution in AI data center infrastructure, enabling the next giant leaps in human progress. The company invented the world’s first 3D-stacked photonics engine, Passage™, capable of connecting thousands to millions of processors at the speed of light in extreme-scale data centers for the most advanced AI and HPC workloads.

Lightmatter raised $400 million in its Series D round, reaching a valuation of $4.4 billion. We will continue to accelerate the development of data center photonics and grow every department at Lightmatter!

If you're passionate about tackling complex challenges, making an impact, and being an expert in your craft, join our team of brilliant scientists, engineers, and accomplished industry leaders.

Lightmatter is (re)inventing the future of computing with light!

In this role, as a part of the product engineering team, you will lead High Volume Manufacturing (HVM) testing and develop novel wafer and package level testing strategies of Lightmatter’s Silicon Photonics products. You will define the HVM testing strategy and roadmap while collaborating with OSAT and test vendors. You will support customer deployments and address related technical issues.

Responsibilities

  • Collaborate with cross-functional teams, including design, architecture, manufacturing, and reliability engineers, to align on test requirements, coverage, and timelines.
  • Develop, document, and implement robust test strategies covering the optical, electrical, and thermal aspects of silicon photonic devices.
  • Drive the execution of test plans across R&D and production, ensuring comprehensive coverage of all photonic device performance metrics.
  • Qualify new test equipment, including optical probes, power meters, and spectrum analyzers, in collaboration with internal teams and equipment vendors.
  • Lead Silicon Photonics characterization and manufacturing test data analysis to implement production pass/fail screen and improve yield and quality. 
  • Implement continuous improvement processes and release test programs to improve test yield and system-level DPPM.
  • Collaborate with quality, foundry, and technology teams to implement failure analysis processes and corrective action plans based on test results.
  • Anticipate project risks and implement mitigation strategies to ensure successful project execution.
  • Lead efforts to develop and maintain automated test systems for SiPh products to ensure scalability and precision in high-volume testing environments while engaging with OSATs.
  • Collaborate with customers and systems team to define and deploy package and SLT test requirements for production.
  • Stay current on advancements in silicon photonics testing methodologies, equipment, and industry standards.
  • Lead and mentor junior engineers.

Requirements:

  • Master's Degree in Photonics, Physics, Electrical Engineering, or a related field.
  • 10+ years of proven experience in silicon photonics test development, including wafer, package, and system-level test experience.
  • Strong understanding of the device physics and operation of silicon photonics devices and circuits.
  • Deep understanding of silicon photonics and relevant testing techniques (e.g., optical alignment, wavelength tuning, parametric performance/defect screening, signal integrity).
  • Hands on lab experience in optoelectronic link testing of photonics chips, components, and devices. 
  • Strong knowledge of DFT principles with experience integrating DFT rules into designs to improve test efficiency and coverage.
  • Experience working with test equipment, including lasers, VNA, switches, spectrum analyzers, high speed oscilloscopes (DCA), BERT, source-meter units, OBR etc.
  • Experience managing vendor relationships for the sourcing and qualifying of critical test equipment and components.
  • Proficiency in Python for test automation.
  • 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:

  • Ph.D in Photonics, Physics, Electrical Engineering, or a related field 
  • Product and Test engineering leadership experience leading efforts from NPI to mass production of silicon photonics-based products.
  • System-level validation experience of silicon photonics products.
  • Experience with photonic design tools like Ansys Lumerical (FDTD, Interconnect), COMSOL, and SI tools like ADS/LTspice.

 

 

We offer competitive compensation. The base salary range for this role determined based on location, experience, educational background, and market data.

Salary Range
$200,000—$250,000 USD

Benefits

  • Comprehensive Health Care Plan (Medical, Dental & Vision)
  • Retirement Savings Matching Program
  • Life Insurance (Basic, Voluntary & AD&D)
  • Generous Time Off (Vacation, Sick & Public Holidays)
  • Paid Family Leave
  • Short Term & Long Term Disability
  • Training & Development
  • Commuter Benefits
  • Flexible, hybrid workplace model
  • Stock Option Plan

Lightmatter recruits, employs, trains, compensates, and promotes regardless of race, religion, color, national origin, sex, disability, age, veteran status, and other protected status as required by applicable law.

 

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