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Added 7 mins ago
SENOIR SERVICE DESIGNER
Green Shield Canada
Toronto, ON
earnings to directly support underserved communities. Through GreenShield
Added 7 mins ago
A
Store/Warehouse Manager
Acciona
ON · CAN - Eglinton Crosstown West
- Full-time
The Store/Warehouse Manager will lead the planning, coordination, and day-to-day management of the warehouse, stores, inventory, and material-control activities supporting the ECWE SRS…
Added 7 mins ago
T
Sr. Manager IT Operations - Network Operations, Performance & Capacity, and Automation
TD
Mississauga, ON
- Full-time
This role requires an experienced technology operations leader who can move easily between executive-level decision support and detailed operational oversight. The successful candidate will…
Added 7 mins ago
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Manager, Business Systems Analysis, TD Securities
TD
Toronto, ON
- Full-time
…clients globally. Within Corporate & Investment Banking, our Technology teams deliver secure, scalable, and resilient solutions that support business growth, operational excellence, and…
Added 7 mins ago
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Associate Director, HEOR, Canada
Moderna
Toronto, ON
- Full-time
Lead the development and execution of local HEOR strategies, evidence generation activities, and key deliverables (e.g., Value Dossier) to demonstrate the value of Moderna’s products incl.…
Added 7 mins ago
SL
Digital Product Manager - CRM and Partnerships
Sun Life
Toronto, ON · Waterloo, ON · Sun Life Toronto One York
- Full-time
…digital partnership ecosystem, expanding our partnerships and lead sources across the digital landscape, along with the CRM and technology experience that connects partners and affiliates…
Added 7 mins ago
AC
Crew Manager
Armstrong Collective
Vancouver, BC
- Full-time
…ownership, and a shared commitment to excellence. We work hard, support one another, embrace new possibilities, and celebrate growth, all in a respectful and inclusive environment where…
Added 22 mins ago
C
Director – SAP Consulting & Business Growth
CGI
Toronto, ON
- Full-time
That same commitment to fairness extends to how we use technology. To support our recruitment team, AI tools may be used to help assess applications though they never replace human…
Added 22 mins ago
CO
Director of Shelters and Housing
Christie Ossington Neighbourhood Centre
Toronto, ON
- Full-time
Lead, support, and develop program leadership staff, including recruitment, hiring, coaching, performance management, and succession planning
Added 22 mins ago
MG
Manager Project Management Office
Maxxit Group
Toronto, ON · Greater Toronto Area, Canada
- Full-time
Lead, mentor, and develop the Project Management team, including Project Managers and Project Coordinators.
Added 23 mins ago
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Senior Manager, T&O M&A, Strategic Initiatives
BMO
Toronto, ON · FCP
- Full-time
Lead and coordinate Technology & Operations activities across complex M&A transactions, including acquisitions, divestitures, separations and other strategic initiatives.
Added 23 mins ago
Team Lead - Toronto Centre District, ON
Scotiabank
Toronto, ON
The Team Lead is responsible for leading, overseeing and providing strategic direction to the Canadian Business Banking (SB) sales force. This role ensures business strategies, plans and…
Added 23 mins ago
F
Manager, Information Security Risk
FCT
Oakville, ON
- Full-time
As the Manager, Information Security Risk, you will lead the assessment, governance, and oversight of information security risks across enterprise technology initiatives, with a primary…
Added 23 mins ago
Manager, Corporate Services
The Government of Nova Scotia
Halifax, NS
In this role, you will lead a diverse portfolio of corporate services that help the department operate effectively, remain prepared, and continuously improve. You will provide leadership…
Added 23 mins ago
Operations Support Representative
Purolator
Vaughan, ON
The Operations Support Representative collects, enters, and tracks data used in reporting and prepares manager reports and maintains documents to ensure document accuracy and proper…
Added 38 mins ago
C
Senior BI Analytics Governance Specialist
Co-operators
Calgary, AB · Guelph, ON · Toronto, ON · Montreal, QC · Quebec, QC
- Full-time
Lead and support the implementation and continuous improvement of analytics governance frameworks, policies, standards, and procedures.
Added 38 mins ago
Engineering Lead Post Booking Optimization - Toronto, ON
Flight Centre
ON
We're looking for an Engineering Lead to own and drive the technical solution behind Post Booking Optimization. This is a high-impact opportunity to design and build systems that…
Added 38 mins ago
UH
Medical Radiation Technologist, Interventional Radiology (Talent Pool)
University Health Network
Toronto, ON
- Full-time
Reports to: Operations Lead, Interventional Radiology
Added 38 mins ago
Software Development Manager, S3 Index
Amazon
Vancouver, BC
- Lead the design, delivery & operations of select services which form part of the S3 Index Control Plane system. These services monitor, scale & repair the data plane services on request…
Added 38 mins ago
C
Senior Advisor, Strategic Change and Transformation Engagement (T & I) (Telework/Hybrid)
CBC/Radio-Canada
Toronto, ON · Montreal, QC
- Full-time
The Technology & Infrastructure (T&I) team is the backbone and the future-forward arm of CBC/Radio-Canada. Our purpose is to constantly innovate to evolve and maintain the Corporation's…
Added 38 mins ago
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Director – Implementation Assurance Testing
RBC
Toronto, ON
- Full-time
Reporting to the VP, Credit Modelling & Methodology, the Director, Implementation Assurance Testing will lead the Implementation Assurance Testing (IAT) team, which is accountable for…
Added 53 mins ago
FC
FLIGHT CENTRE - QA ENGINEER - VANCOUVER, BC
Flight Centre Travel Group Canada
BC · British Columbia, Canada
- Full-time
Join our Digital Workplace team and play a critical role in delivering high-quality solutions that support our global Onboarding and Customer Success teams. As a QA Engineer, you'll work at…
Added 53 mins ago
TT
EHSS Intern- Summer 2027
TTM Technologies
Toronto, ON
- Full-time
TTM Technologies, Inc. is a leading global manufacturer of technology products, including mission systems, radio frequency (“RF”) components, RF microwave/microelectronic assemblies, and…
Added 53 mins ago
FC
FLIGHT CENTRE - QA ENGINEER - TORONTO, ON
Flight Centre Travel Group Canada
ON · Ontario, Canada
- Full-time
Join our Digital Workplace team and play a critical role in delivering high-quality solutions that support our global Onboarding and Customer Success teams. As a QA Engineer, you'll work at…
Added 53 mins ago
CO
Director of Shelters and Housing
Christie Ossington Neighbourhood Centre
Toronto, ON
- Full-time
Lead, support, and develop program leadership staff, including recruitment, hiring, coaching, performance management, and succession planning

Lightmatter

Machine Learning Infrastructure Researcher

Toronto, ON, Canada

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Job details

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.

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More about this job

Responsibilities

The role involves inventing novel hardware systems using Lightmatter technology and modeling the performance of these systems for AI training and inference workloads. You will also lead a team of machine learning engineers and collaborate with product and architecture teams to design reference platforms.

Requirements

Candidates must hold a PhD in Computer Science, Electrical Engineering, or a related field with at least 10 years of industry or research experience. A strong background in machine learning systems research, performance modeling, and experience with large language model frameworks is required.

Skills

Machine Learning
Systems Research
Performance Modeling
Deep Learning
Large Language Models
Silicon Photonics
AI Infrastructure
Performance Evaluation
Compute Architectures
Networking Technologies
GPU
TPU
Ethernet
Infiniband
NVLink
Team Leadership

Benefits

Comprehensive Health Care Plan
Life Insurance
Generous Time Off
Paid Family Leave
Short Term Disability
Long Term Disability
Training & Development
Commuter Benefits
Flexible, Hybrid Workplace Model
Equity Grants

Visa sponsorship

Not detected in the job text

Keywords

Machine Learning
Infrastructure
Photonics
Passage
AI
HPC
Silicon Photonics
Performance Analysis
Rack-scale Design
Deep Learning
Large Language Models
GPU
TPU
Ethernet
Infiniband
NVLink
Systems Research
Performance Modeling
Academic Research
Whitepapers
Team Leadership
Computer Science
Electrical Engineering
Data Center
Inference
Training

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