Electro-Optic Link Hardware Engineer
Salary$155k – $190k
LocationBoston, MA, Mountain View, CA, Mountain View, CA
Work modehybrid
Typefull-time
SeniorityLead
Experience8+ yrs
DepartmentPhotonics & Silicon Engineering
EquityIncluded
Company size201–500 people
PostedSep 24, 2026 · 2w ago
Verified live1d ago
At a glanceSummarised by Seekless from the posting.
MS/PhD in EE, Photonics, Physics (8+ yrs) or BS/MS (10+ yrs)
Ownership of verification strategy for a full silicon/system program
Deep expertise in 56G/112G/224G+ serial links, SerDes equalization (CTLE/FFE/DFE), and signal integrity (S-parameters, crosstalk, link budgets)
Hands-on lab experience leading investigations that stalled others
Strong Python/MATLAB for team-used automation frameworks
Proficiency with VNA, scopes, BERTs, TDRs, and tools like ADS, HFSS, Cadence, COMSOL
Track record mentoring engineers
Silicon photonics/EO systems at the architecture level
Package/PCB/channel co-design ownership
COM/IBIS-AMI modeling, patents/standards contributions (OIF, IEEE 802.3)
Capacity to comply with federally mandated requirements of U.S. export control laws
Skills
Python
MATLAB
VNA
scopes
BERTs
TDRs
ADS
HFSS
Cadence
COMSOL
COM
IBIS-AMI
Benefits
Health insurance
Dental insurance
Vision insurance
Retirement savings matching
Life insurance
Generous time off
Paid family leave
Short term disability
Long term disability
Training and development
Commuter benefits
Equity grants
About the company
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!
About the role
We’re looking for a hands-on Photonics engineer to lead verification and characterization of high-speed electro-optic links across multiple silicon and system programs. You’ll work at the bench alongside the EOE team owning modeling methodology, measurement standards, and serving as the escalation point for the toughest signal integrity and link-performance problems in the org.
Responsibilities:
•
Run hands-on lab characterization and debug of high-speed electrical/optical hardware, including novel failure modes
•
Build system-level electrical/optical/EO channel models and correlate them against your own bench measurements
•
Own link budget and verification methodology while staying hands-on with the validating measurements
•
Characterize eye diagrams, BER, jitter, equalization, and channel impairments
•
Support silicon bring-up and root-cause debug with analog, package, PCB, and SerDes teams
•
Influence chip/package/system architecture tradeoffs based on bench findings
•
Mentor Senior/Staff engineers without stepping back from lab work
•
Build automation/tools to speed up characterization work
Qualifications:
•
MS/PhD in EE, Photonics, Physics (8+ yrs) or BS/MS (10+ yrs)
•
Ownership of verification strategy for a full silicon/system program
•
Deep expertise in 56G/112G/224G+ serial links, SerDes equalization (CTLE/FFE/DFE), and signal integrity (S-parameters, crosstalk, link budgets)
•
Hands-on lab experience leading investigations that stalled others
•
Strong Python/MATLAB for team-used automation frameworks
•
Proficiency with VNA, scopes, BERTs, TDRs, and tools like ADS, HFSS, Cadence, COMSOL
•
Track record mentoring engineers
Preferred Qualifications:
•
Silicon photonics/EO systems at the architecture level
•
Package/PCB/channel co-design ownership
•
COM/IBIS-AMI modeling, patents/standards contributions (OIF, IEEE 802.3)
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.
$155,000—$190,000 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)
Benefits eligibility may vary depending on your employment status and location. 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.
Export Control
Candidates should have capacity to comply with the federally mandated requirements of U.S. export control laws.