Lightmatter

Electro-Optic Link Hardware Engineer

Lightmatter$140K — $170K *
Telecommunications & Hardware
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • PhD in EE, Photonics, Physics; or MS +3 years relevant experience
  • Hands-on experience with high-speed serial links (56G/112G+)
  • Knowledge of SerDes equalization and signal integrity fundamentals
  • Strong bench skills: VNA, scopes, BERTs, TDRs
  • Ability to build setups from scratch and critically evaluate measurements
  • Proficient in Python or MATLAB for automation and analysis
  • Proven track record of successfully resolving bench-level debug issues

Responsibilities

  • Conduct hands-on lab characterization and debugging of high-speed hardware
  • Characterize eye diagrams, BER, jitter, and channel impairments
  • Build and validate electrical/optical channel models against measurements
  • Execute link budget validation and identify model-silicon discrepancies
  • Support silicon bring-up and collaborate with cross-functional teams
  • Develop automation and scripts for characterization processes
  • Document measurement setups and methodologies for reproducibility

Benefits

  • Comprehensive Health Care Plan (Medical, Dental & Vision)
  • Retirement Savings Matching Program
  • Life Insurance options
  • Generous Time Off including vacation and sick leave
  • Paid Family Leave
  • Short Term & Long Term Disability coverage
  • Training and Development opportunities
  • Commuter Benefits
  • Flexible, hybrid workplace model
  • Equity grants for full-time employees
Full Job Description
We9re looking for a hands-on Photonics engineer to run verification and characterization of high-speed electro-optic links. You9ll spend most of your time at the bench with the EOE team, executing measurements, debugging links, and building the automation that makes characterization faster and repeatable.

Responsibilities:
  • Run hands-on lab characterization and debug of high-speed electrical/optical hardware
  • Characterize eye diagrams, BER, jitter, equalization, and channel impairments across process/voltage/temperature
  • Build and correlate electrical/optical/EO channel models against your own bench measurements
  • Execute link budget validation measurements and flag gaps between model and silicon
  • Support silicon bring-up and root-cause debug alongside analog, package, PCB, and SerDes teams
  • Build automation and scripts (instrument control, data pipelines, analysis) to speed up characterization
  • Document measurement setups, methods, and results so others can reproduce them

Qualifications:
  • PhD in EE, Photonics, Physics; or MS +3 years of relevant experience
  • Hands-on experience characterizing and debugging high-speed serial links (56G/112G+)
  • Working knowledge of SerDes equalization (CTLE/FFE/DFE) and signal integrity fundamentals (S-parameters, insertion/return loss, crosstalk)
  • Strong bench skills: VNA, real-time and sampling scopes, BERTs, TDRs
  • Comfortable building a setup from scratch and knowing when the measurement is lying to you
  • Solid Python or MATLAB for instrument automation and data analysis
  • Track record of closing out debug investigations at the bench

Preferred Qualifications:
  • Silicon photonics or EO link exposure (modulators, photodetectors, optical test)
  • ADS, HFSS, or similar simulation tools
  • COM/IBIS-AMI familiarity
  • Package/PCB channel measurement or de-embedding 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.

$140,000-$170,000 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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