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Added 9 mins ago
GV
Project Manager Construction & Commissioning / Chef de projet Construction & Mise en service
GE Vernova
Brossard, QC
- Full-time
Coordonner les activités du site avec l'Engineering et le Supply Chain.
Added 9 mins ago
GV
Lead Manufacturing Specialist 2 - Prod Process and Equip
GE Vernova
Markham, ON
- Full-time
Lead the industrialization strategy for new products, ensuring that assembly processes are capable, repeatable, and scalable from pilot build to full-rate production.
Added 9 mins ago
IL
Advanced Quality Engineer
Invesco Ltd.
Charlottetown, PE
- Full-time
…releases. This role works closely with Product Management, Software Engineering, DevOps, and UX teams to validate functionality, performance, security, and overall user experience. The…
Added 9 mins ago
Project Manager, Customer Success & Account Management
GoBolt
Toronto, ON
You will work closely with Account Managers, Warehouse Fulfillment, Transportation, Engineering and Finance teams. A background in logistics or 3PL is a strong asset, but it is not…
Added 9 mins ago
K
Lead HVAC Design & Drafting Technologist
Kent
Calgary, AB
- Part-time
Kent is looking for a Lead Heating, Ventilation, and Air Conditioning (HVAC) Design and Drafting Technologist to prepare engineering designs, drawings, building information models, and…
Added 9 mins ago
RU
ServiceNow Architect
RSM US LLP
Toronto, ON
- Full-time
Lead the architecture and technical design of complex ServiceNow implementations, enhancements, integrations, and transformation initiatives.
Added 24 mins ago
VP
System Integration Project Manager
Vista Projects
Calgary, AB
- Full-time
The System Integration Project Manager leads the delivery of SI projects at the intersection of engineering data, application development and emerging AI tooling. This role coordinates the…
Added 24 mins ago
AC
Senior Project Manager - Civil
Accenture Construct
Toronto, ON
- Full-time
At Accenture Construct, that's the job. You'll help deliver the data centers, power grids, rail networks, factories and public infrastructure that keep communities moving - smarter, safer…
Added 24 mins ago
TT
Procurement and Supply Chain Intern – Summer 2027
TTM Technologies
Toronto, ON
- Full-time
Analyze purchasing, inventory and supplier delivery data to identify cost, lead time and service improvement opportunities.
Added 24 mins ago
E
Braze Lead Developer
EXL
ON · Ontario, Canada
- Full-time
We are seeking a hands-on Braze Lead Developer to build, integrate, and scale Braze solutions for enterprise clients. You will lead a team of developers while remaining deeply hands-on:…
Added 24 mins ago
CT
Lead QA Engineer
Cosmo Technologies
Toronto, ON
- $95,000 to $130,000 CAD / year
- Full-time
Role Summary: We are seeking a highly skilled and forward-thinking Lead QA Engineer to guide our global QA efforts while introducing and embedding AI-based tools and intelligent automation…
Added 24 mins ago
RD
Technical Project Manager - Software Solutions
Randstad Digital
Toronto, ON · Greater Toronto Area, Canada
- Full-time
…bridge the gap between business stakeholders and technical engineering teams. You will drive the end-to-end planning and execution of cross-functional enterprise initiatives delivering…
Added 24 mins ago
RL
Recycling Auditor
Reverse Logistics Group (RLG)
Brampton, ON
- Full-time
…shipping of materials and supplies, as well as document and data…
Added 24 mins ago
OT
Architectural Quality Inspector
Ontario Transit Group - Ontario Line - Southern Civil, Stations & Tunnel
Toronto, ON
- Full-time
Lead and support the development, review, implementation, and continuous improvement of Architectural Inspection and Test Plans (ITPs).
Added 24 mins ago
PR
Corporate Planning Engineer
Parex Resources
Calgary, AB
- Full-time
…and Development Planning background, to report to the Team Lead Corporate Planning, in the capacity of Corporate Planning Engineer. This role contributes directly to building on Parex’s…
Added 24 mins ago
MP
IT Director, Application Development & Support
Michael Page
Markham, ON
- $140,000 to $180,000 CAD / year
- Full-time
Lead application development, quality engineering, integrations, support, and operational teams.
Added 24 mins ago
PR
Corporate Planning & Financial Analyst
Parex Resources
Calgary, AB
- Full-time
This position is embedded within the Capital Markets & Corporate Planning team, reporting to the Team Lead Corporate Planning. The Corporate Planning & Financial Analyst role contributes…
Added 24 mins ago
W
Ingénieur en amélioration continue / Continuous Improvement Engineer - French
Wonderbrands
Gatineau, QC
- Full-time
…engineer, the continuous improvement engineer will initiate and lead the execution of projects related to the standardization of best practices, continuous cost reduction and increased…
Added 24 mins ago
Machine Learning Infrastructure Researcher
Lightmatter
Toronto, ON
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,…
Added 24 mins ago
C
Lead QA Engineer
COSMO
Remote, Canada
- $95,000 to $130,000 CAD / year
- Full-time
- Remote
Role Summary: We are seeking a highly skilled and forward-thinking Lead QA Engineer to guide our global QA efforts while introducing and embedding AI-based tools and intelligent automation…
Added 24 mins ago
Senior Application Developer (Computer Services Officer 4)
The Government of Nova Scotia
Halifax, NS
Lead solution design and technical implementation using modern software engineering principles and best practices.
Added 40 mins ago
W
Ingénieur en amélioration continue / Continuous Improvement Engineer
Wonderbrands
Gatineau, QC
- Other
…engineer, the continuous improvement engineer will initiate and lead the execution of projects related to the standardization of best practices, continuous cost reduction and increased…
Added 40 mins ago
T
Manager, Operational Foundations
Thumbtack
Remote, Canada
- Full-time
- Remote
Lead integration support: Oversee the team that resolves partner integration issues and establish a clear, prioritized escalation path with Product and Engineering for API issues, bugs, and…
Added 40 mins ago
PT
Principal Technical Program Manager
PAR Technology
Remote, Canada
- $160,000 to $190,000 CAD / year
- Full-time
- Remote
· Lead the end-to-end planning, execution, and delivery of complex technology programs, ensuring alignment with PAR’s business objectives, product strategy, and engineering priorities.
Added 40 mins ago
TG
Junior Cybersecurity Operations Analyst Intern
TMX Group
Toronto, ON
- $20 to $24 CAD / hour
- Full-time
This role reports to: Global Technology Lead, Cyber Defence

Lightmatter

Machine Learning Infrastructure Researcher

Toronto, ON, Canada

Full-time

Apply About employer

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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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