Lightmatter
Electro-Optic Link Hardware Engineer
About this role
Lead hardware verification and characterization of high-speed electro-optic links for Lightmatter's photonics-based AI data center infrastructure. You'll own verification methodology, drive bench testing of novel optical-electrical systems, build predictive models, and mentor senior engineers while solving critical signal integrity challenges across silicon and system programs.
What you'll do
- Conduct hands-on lab characterization and debug of high-speed electro-optic hardware with novel failure modes
- Build and validate system-level electrical/optical/EO channel models against bench measurements
- Own link budget and verification methodology while executing measurements and correlations
- Characterize eye diagrams, BER, jitter, equalization, and channel impairments across 56G+ serial links
- Support silicon bring-up and root-cause analysis with analog, package, PCB, and SerDes teams
- Develop automation and tools to accelerate characterization workflows and mentor engineers
What they're looking for
- High-speed serial links (56G/112G/224G+) and SerDes equalization (CTLE/FFE/DFE)
- Signal integrity, S-parameters, crosstalk analysis, and link budget modeling
- Lab instrumentation: VNA, oscilloscopes, BERTs, TDRs
- Simulation and modeling tools: ADS, HFSS, Cadence, COMSOL, COM/IBIS-AMI
- Python and MATLAB for automation frameworks
- Silicon photonics and electro-optic systems architecture
- Package/PCB/channel co-design
- Team mentoring and technical leadership
Benefits
- Competitive base salary ($195,000–$250,000) plus equity grants
- Comprehensive medical, dental, and vision coverage
- 401(k) matching and life insurance
- Generous paid time off, sick leave, and paid family leave
- Flexible hybrid work model in Boston, MA
- Professional development and training programs
Opens the official application on the employer’s site. No login required.
Lightmatter
Lightmatter builds silicon photonics-based optical interconnect products and AI data center infrastructure powered by advanced photonic technologies. The company is hiring hardware validation engineers, mechanical designers, and mixed-signal validation engineers to design test systems, verify high-speed electro-optic links, develop server chassis platforms, and optimize photonic communication circuits.
- Website
- lightmatter.com
Likely interview questions
- Walk us through a high-speed link failure you debugged that stalled others—what was your methodology and what did you discover?
- How have you built and validated channel models in past projects, and how did you ensure correlation with hardware measurements?