Lightmatter

Staff High-Speed I/O Test Engineer

Lightmatter$187K — $220K *
Technical Services
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • Master's in Electrical Engineering, Computer Engineering, or related field.
  • 6+ years of industry experience in high-speed link test development.
  • Extensive hands-on lab experience with high-speed equipment.
  • Strong familiarity with high-speed interfaces and analog building blocks.
  • Experience in test system automation using Python.
  • Strong analytical skills for troubleshooting hardware and signal integrity issues.
  • Ability to convey technical concepts to both technical and non-technical stakeholders.

Responsibilities

  • Execute high-speed serial I/O characterization and validation for products.
  • Collaborate with architecture, signal integrity, and silicon design teams for testing techniques.
  • Architect test concepts and platforms, providing feedback during technology concept phases.
  • Set up and operate high-speed lab equipment such as oscilloscopes and VNAs.
  • Develop Python-based test software for automating measurements and data analysis.
  • Define and develop stress testing methodologies for serial I/Os.
  • Troubleshoot complex issues with compliance test hardware and DUT.
  • Collaborate with vendors to procure test equipment.

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
  • Equity grants (for full-time employees)
Full Job Description
About this Role

You will be focused on validating and architecting package and system-level test strategies for high-speed I/O interfaces on Lightmatter's novel product line. In this role, you will be responsible for setting up and executing high-speed electrical characterization, driving link bring-ups, and stress-testing I/Os in system environments.

You will work closely with cross-functional teams to transition these technologies into high-volume manufacturing. We are looking for an engineer with a proven track record of testing real-world industry products. You will be part of a growing interdisciplinary team with a lot of opportunities to learn and make a big impact.

Responsibilities
  • Execute high-speed serial I/O characterization and validation across multiple platforms for Lightmatter products.
  • Work directly with architecture, signal integrity, and silicon design teams to understand the technology and conceptualize characterization and test techniques targeting product manufacturing.
  • Architect test concepts, test platforms, and design-for-test rules, providing critical feedback during the technology concept phase.
  • Set up and operate a wide range of high-speed lab equipment, including oscilloscopes, BERTs, AWGs, TDRs, and VNAs/PNAs.
  • Develop Python-based test software and scripts to automate lab measurements, test execution, data analysis, and parameter extraction.
  • Define and develop stress testing methodologies to identify design operating limits of serial I/Os post-system integration.
  • Troubleshoot and triage complex issues with compliance test hardware, fixtures, software, and the Device Under Test (DUT).
  • Work with vendors to specify and procure state-of-the-art test equipment.

Requirements
  • Master's in Electrical Engineering, Computer Engineering, or a related field.
  • 6+ years of industry experience in transceiver, SerDes, or high-speed link test development on products
  • Extensive hands-on lab experience and familiarity with high-speed equipment, including oscilloscopes, BERTs, PPGs, VNAs, and spectrum analyzers.
  • Strong familiarity with high-speed interfaces and analog building blocks (e.g., PLL, CDR, CTLE, DFE, FFE, and FEC).
  • Experience in test system automation and data processing using Python.
  • Strong analytical and debugging skills to identify and solve hardware and signal integrity issues during the testing process.
  • Ability to convey complex technical concepts to both technical and non-technical stakeholders.

Preferred Qualifications
  • Hands-on experience in the characterization and testing of silicon photonics components and circuits (e.g., tunable lasers, power meters, polarization synthesizers, OBR/OVA).
  • Understanding of Silicon Photonics components and optical testing methodologies.
  • Deep knowledge of system-level SerDes design and channel analysis, including understanding insertion loss, return loss, crosstalk, and link training algorithms.
  • Knowledge of industry specifications such as IEEE 802.3, OIF, PCIe, or USB4.
  • Ph.D. with 2+ years of relevant industry experience.


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

Salary Range: total compensation goes beyond base salary, it also includes a new hire equity grant, annual performance-based equity, and other rewards that recognize your impact and contribution.

$187,000-$220,000 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
  • Equity grants (applicable to full-time employees)

About Lightmatter

Industry
Founded
2017

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