Lightmatter · 1 day ago
Sr. Photonics Test/Characterization Engineer
Boston, MA
Full-time
Hybrid
Senior Level
$170K/yr - $200K/yr
5+ years expLightmatter is leading the revolution in AI data center infrastructure and is seeking a highly skilled High-Speed Photonics Engineer. The role involves lab testing high-speed optical links and photonic modulators, contributing to the development of innovative computing technology.
AI InfrastructureArtificial Intelligence (AI)Data CenterMachine LearningSemiconductorSoftware
Responsibilities
Bring up and characterize high-speed optical interconnect packages and components, such as modulators and photodetectors
Use high-speed test components and equipment, including high-speed DCAs, BERTs, AWGs, VNAs, ESAs, OSAs, signal sources, electrical high-speed amplifiers, and filters
Demonstrate working knowledge of different equalization techniques, e.g., CTLE, DFE, FFE, in high-speed optical links
Utilize working knowledge of high-speed Signal Integrity eye diagrams, Bathtub Curves, etc
Identify hardware issues and work towards resolutions with teams specializing in integrated optics, high-speed electronics, and opto-electronic packaging
Use RF simulation tools like HFSS, Keysight ADS, or equivalents
Familiarity with finite element analysis of photonics components using tools like Lumerical, Tidy3D, Synopsis OptoDesigner, etc
Program in languages such as Python and MATLAB
Work collaboratively across various functional teams within the company in a highly interdisciplinary environment
Qualification
Required
PhD in Electrical Engineering, Photonics, or a related field
Minimum of 5 years of relevant experience in high-speed photonics engineering
Demonstrated experience in silicon photonics components, high-speed modulators, and high-speed optical interconnect
Strong analytical skills with the ability to perform detailed analysis and data interpretation
Proven track record of extensive lab work, particularly with high-speed instruments and integrated photonics chips or systems
Hands-on laboratory experience in setting up and characterizing high-speed optical communication systems
Strong verbal and written communication and documentation skills
Experience with Python tools for scientific computing and lab automation
Experience with active microwave circuits and RF and analog systems
Experience in high-speed circuit simulation and characterization using Cadence Spectre and 3D EM simulators like Keysight ADS and HFSS a plus
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)
Company
Lightmatter
Lightmatter develops photonic chips that enable data processing and communication using light instead of electricity.
201-500 employees
H1B Sponsorship
Lightmatter has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (21)
2024 (12)
2023 (5)
2022 (4)
2021 (4)
2020 (4)
Funding
Current Stage
Late StageTotal Funding
$822MKey Investors
T. Rowe PriceViking Global InvestorsGoogle Ventures
2024-10-16Series D· $400M
2023-12-19Series C· $155M
2023-05-31Series C· $154M
Leadership Team
Nicholas Harris
Founder, CEO
B
Bob Turner
Sr. VP Sales & Solution Architecture
Recent News
2025-11-23
2025-10-09
Company data provided by crunchbase