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Added 14 mins ago
MI
IT Co-op Student
Magna International
Brampton, ON
- Full-time
Conduct business in an ethical manner in compliance with the Magna Code of Conduct
Added 14 mins ago
IF
Senior Advisor, Integrated Marketing and Cross-Functional Campaigns
iA Financial Group
Montreal, QC · Quebec, QC
- Full-time
You will provide leadership in campaign development by mobilizing business lines, expert teams, and agencies. Your expertise will help ensure strategic alignment, brand consistency, and the…
Added 14 mins ago
A
Digital Transformation Strategy Implementation Specialist
Accenture
Calgary, AB · Vancouver, BC · Ottawa, ON · Toronto, ON · Montreal, QC
- Full-time
Develop transformation roadmaps, value cases, business cases and implementation plans aligned with client objectives.
Added 14 mins ago
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CCaaS Solution Architect - Amazon Connect
Accenture
Montreal, QC
- Full-time
…through the unlimited potential of imagination, technology and intelligence. Visit us at:…
Added 14 mins ago
A
Store/Warehouse Manager
Acciona
ON · CAN - Eglinton Crosstown West
- Full-time
Added 14 mins ago
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Solution Consultant
Workday
Calgary, AB · Vancouver, BC · Victoria, BC · Toronto, ON · Montreal, QC · Canada, QC, Montreal
- Full-time
…Management teams, providing exposure to various areas of the…
Added 14 mins ago
R
Client Advisor
RBC
Truro, NS
- Part-time
…individual needs. You will champion the RBC brand and drive business by supporting new client acquisition and deepening existing relationships. If you have the self-motivation to deliver…
Added 14 mins ago
P
Group Product Manager
Priceline
Toronto, ON
- Full-time
Define What Good Search Looks Like: Own the search quality framework, from SLOs and SLIs for critical applications to the business KPIs that connect search behaviour to bookings.
Added 14 mins ago
AG
National Key Account Manager - Retail
Affinity Group
Richmond Hill, ON
- Full-time
Lead Joint Business Planning, category reviews, line reviews and customer presentations.
Added 14 mins ago
SR
Wireless Sales Consultant
Staples Retail
Vancouver, BC
- Part-time
…self-development and interact with the larger store team and other business units to share your expertise. Primarily a sales position, you help our consumers and business customers achieve…
Added 14 mins ago
SC
Retail Print & Services Supervisor
Staples Canada
Regina, SK
- Full-time
…sales, and maintain operational excellence. Your passion for the business will shine through as you guide your team in assisting customers with solutions, products, and services, while also…
Added 14 mins ago
SC
Wireless Sales Consultant
Staples Canada
Surrey, BC
- Full-time
…self-development and interact with the larger store team and other business units to share your expertise. Primarily a sales position, you help our consumers and business customers achieve…
Added 14 mins ago
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Associate Director, HEOR, Canada
Moderna
Toronto, ON
- Full-time
…HEOR scientific evidence, and align HEOR initiatives with the business…
Added 14 mins ago
SL
Director, Human Resources Business Partner, Enablement Functions
Sun Life
Toronto, ON · Waterloo, ON · Montreal, QC · Sun Life Toronto One York
- Full-time
The Director, Human Resources Business Partner for the Enablement Functions in Sun Life Canada will be responsible for implementing people and talent initiatives providing consulting…
Added 29 mins ago
I
General Manager (Grand Prairie)
Indigo
AB · Alberta, Canada
- Full-time
Articulate Indigo’s mission and strategy and communicate business goals to store team
Added 29 mins ago
VS
Report Developer
vTech Solution Canada
Toronto, ON
- Contract
…for data-driven decision-making, analytics, and artificial intelligence. ODP provides a modern and scalable data environment supporting data ingestion, storage, processing, governance,…
Added 29 mins ago
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Consultant Space Infrastructure - Montreal
NovaSpace
Montreal, QC
- Full-time
Supporting proposal-writing and business development
Added 29 mins ago
MG
Manager Project Management Office
Maxxit Group
Toronto, ON · Greater Toronto Area, Canada
- Full-time
…experience, and strengthening operational performance across the…
Added 29 mins ago
WS
Contrôleur Financier / Financial Controller
Walter Surface Technologies
Montreal, QC
- Full-time
Added 29 mins ago
P
Software Developer
PolicyAdvisor
Oakville, ON
- $60,000 to $70,000 CAD / year
- Full-time
We are seeking an Software Developer to join our dynamic team at PolicyAdvisor Brokerage (PAB) Inc. As a Software Developer, you will play a pivotal role in designing and implementing…
Added 29 mins ago
NB
Cybersecurity advisor - Data protection DLP
National Bank of Canada
Montreal, QC
- Full-time
Collaborate with monitoring, architecture, technology delivery, security, and business teams to design and deploy new data protection services and controls.
Added 29 mins ago
CC
Senior Analytics Engineer
Cactus Club Cafe
Vancouver, BC
- $170,000 to $195,000 CAD / year
- Full-time
…experience building governed semantic or metrics layers that business users and AI tools can rely…
Added 29 mins ago
TC
Finance Manager
The Crump Group, Inc.
Mississauga, ON
- $100,000 to $120,000 CAD / year
- Full-time
Serve as the lead Finance Business Partner for Sales and Marketing leadership, providing financial insights and influencing commercial decisions.
Added 29 mins ago
C
Senior Regulatory Compliance Examiner
CIBC
Toronto, ON
- Full-time
…sound RCM framework, as well as knowledge of CIBC lines of business, Governance Groups, Oversight Functions and Compliance. In addition to working on the RCM Examination portfolio, the…
Added 29 mins ago
M
Sr. Marketing Manager, Core Surgical Innovations
Medtronic
Brampton, ON · CAN-ON Brampton
- Full-time
Build strong understanding of customer needs, market dynamics, and competitive activity; translate insights into clear business recommendations.

Lightmatter

Machine Learning Infrastructure Researcher

Toronto, ON, Canada

Full-time

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Job details

Job type: Full-time
Apply by: Dec 4, 2026
Experience: PhD in Computer Science, Electrical Engineering, or a related field and at least 10 years of industry or research experience in the field.
Posting language: English
Posted: Nov 4, 2026

Original job description

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!

Lightmatter is seeking a Principal of Machine Learning Infrastructure Researcher to join our Machine Learning team. This team is focused on inventing novel hardware systems using Lightmatter technology and modeling the performance of Lightmatter-enabled systems on both training and inference workloads.

This is primarily a creative role where you need to think outside the box to push the boundaries of systems research with the power of silicon photonics at your fingertips. This role will work closely with our product, solutions architecture, and engineering teams to generate impactful performance analysis, create high-performance rack-scale designs, and publish cutting-edge ML systems research.

Responsibilities

Stay up to date on the latest advancements in Machine Learning research.
Build tools to model the performance of Passage-enabled systems when running both training and inference workloads for the latest AI models.
Collaborate with our product and solutions architecture teams to design compelling reference platforms for our customers, powered by Lightmatter technology.
Function as the Machine Learning expert in the room.
Publish academic papers at top industry conferences and journals. Help support the publication of whitepapers, blog posts, and other marketing collateral.
Lead a small team of Machine Learning engineers

Qualifications

PhD in Computer Science, Electrical Engineering, or a related field and at least 10 years of industry or research experience in the field.
Solid background in Machine Learning systems research and experience with performance evaluation and performance modeling.
Hands-on experience with machine learning / deep learning methods and extensive knowledge of Large Language Model training and inference frameworks.
Academic publications in relevant journals and industry conferences.
Strong knowledge of AI systems, including compute (GPUs, TPUs, etc.) and networking (Ethernet, Infiniband, NVLink, etc.) technologies, and their various topologies, paradigms, and trade-offs.
Proven track record leading a team to deliver published results.

Preferred Qualifications

Demonstrated ability to creatively problem-solve and apply first-principles thinking to generate novel ideas, particularly in ambiguous, evolving environments.
Exceptional skills in communicating complex research outcomes and technical concepts to partners and internal stakeholders, while embodying our value of speaking truth.
Ability to work across research, product, and business functions, rolling up your sleeves to bridge gaps and accelerate outcomes, while demonstrating the core value of "We are one Lightmatter."
Adaptable and versatile, thriving in a high-speed, high-precision environment.
Experience in managing engineers and leading projects, with the ability to lift up the team, and work with high standards and high collaboration.

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.

Apply About employer

More about this job

Responsibilities

Develop tools to model the performance of Passage-enabled systems on AI training and inference workloads, and collaborate with product and solutions architecture teams to design customer reference platforms. Lead a small team, contribute to research publications and other technical content, and serve as the machine learning expert across the organization.

Requirements

Requires a PhD in Computer Science, Electrical Engineering, or a related field, with at least 10 years of industry or research experience. Candidates should have machine learning systems research and performance modeling expertise, hands-on deep learning experience, extensive knowledge of LLM training and inference frameworks, relevant publications, and strong knowledge of AI compute and networking systems; a track record of leading a team to publish results is also required.

Skills

Machine Learning Systems Research
Performance Modeling
Performance Evaluation
Large Language Model Training
Large Language Model Inference
Deep Learning
AI Systems
GPU and TPU Systems
Networking Technologies
System Topologies
Academic Publishing
Team Leadership
Technical Communication
First-Principles Thinking

Benefits

Health Care Plan
Life Insurance
Paid Time Off
Paid Family Leave
Short-Term Disability
Long-Term Disability
Training and Development
Commuter Benefits
Flexible Hybrid Workplace
Equity Grants

Visa sponsorship

Not detected in the job text

Keywords

Machine Learning
Machine Learning Systems Research
Artificial Intelligence
High-Performance Computing
Passage
Silicon Photonics
Data Center Infrastructure
Performance Modeling
Performance Evaluation
Training Workloads
Inference Workloads
Large Language Models
Deep Learning
GPUs
TPUs
Ethernet
InfiniBand
NVLink
System Topologies
Reference Platforms
Rack-Scale Designs
Academic Publications
Whitepapers
Research Leadership
Team Management

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