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Added 3 days ago
FA
Ecommerce Product Manager
Flair Airlines
Vancouver, BC
- Full-time
…Check-in, and post-booking experiences. Working closely with cross-functional stakeholders, you will deliver customer-centric digital solutions that enhance self-service capabilities,…
Added 3 days ago
C
Business Data Analyst (BFSI)
Capgemini
Mississauga, ON
- Full-time
Experience supporting cross-functional delivery efforts, including requirements gathering, testing, and implementation support.
Added 3 days ago
CG
Clinical Applications Analyst - (24479)
Collingwood General and Marine Hospital
Barrie, ON
- Temporary
…candidate will play a key role in planning, implementation, testing, optimization, training, and stabilization activities associated with CARE+ project or in providing operational support,…
Added 3 days ago
RI
Oracle HCM Technical Developer (Integrations & VBS Customizations)
Raas Infotek
Mississauga, ON
- Contract
Perform technical analysis, solution design, development, testing, and deployment.
Added 3 days ago
NI
Business Analyst ----with RPA & Power Platform
Nityo Infotech
Toronto, ON
- Contract
Define clear use cases, acceptance criteria, test conditions, and expected results for functional, UAT, performance, and operational testing.
Added 3 days ago
UT
Professional Engineering - Electrical Systems Integration
UNIZON Taskforce Technology
Montreal, QC
- $110,000 to $150,000 CAD / year
- Full-time
…Electrical Systems Integration in a multifaceted position within the Functional Engineering Team. The Electrical System Integration team is responsible to develop, certify, improve, and…
Added 3 days ago
OS
Senior Information Management Analyst
Ontario Securities Commission
Toronto, ON · CA ON Toronto
- Full-time
Translate retention schedules and governance requirements into functional requirements and technology configurations.
Added 3 days ago
N
Senior Data Scientist (Applied ML) - Canada
NerdWallet
Remote, Canada
- $161,000 to $243,000 CAD / year
- Full-time
- Remote
Strong software engineering fundamentals, including version control, testing, modular code design, and CI/CD practices for machine learning.
Added 3 days ago
T
Senior IT Developer
TD
London, ON · Mississauga, ON · Toronto, ON
- Full-time
…with standards; provide code maintenance and support during testing cycles and post-production deployment and participate in reviewing peer…
Added 3 days ago
C
Senior Digital ASIC Verification Engineer
Ciena
Ottawa, ON
- $111,900 to $178,700 CAD / year
- Full-time
…verification engineers to develop verification strategies, create functional test environments and scenarios, debug challenging failures, and drive verification toward…
Added 3 days ago
Head of Sales Training Delivery, SI Buildings
Siemens
Canada
If you require a reasonable accommodation in completing a job application, interviewing, completing any pre-employment testing, or otherwise participating in the employee selection process,…
Added 3 days ago
C
Full Stack Software Developer | Temporary Full Time (1.0 FTE) | CHEO Research Institute
CHEO
Canada
- Full-time
…full software lifecycle, including application development, testing, system integration, deployment, operational support, and ongoing platform…
Added 3 days ago
Bureau de la transformation numérique / Digital Transformation Office - Responsable de l’IA / AI Lead
Jam
QC · Baie D'urfe, QC
Added 3 days ago
L
Electronics Engineer
Lumentum
Ottawa, ON · Canada - Ottawa (Bill Leathem)
- Full-time
Work closely with cross-functional teams, including software, firmware, optical, MFG, and mechanical.
Added 3 days ago
RI
Oracle HCM Technical Developer (Integrations & VBS Customizations
Raas Infotek
Mississauga, ON
- Contract
Perform technical analysis, solution design, development, testing, and deployment.
Added 3 days ago
TI
BSA with RPA & Power Platform
Themesoft Inc.
Toronto, ON
- Contract
Define clear use cases, acceptance criteria, test conditions, and expected results for functional, UAT, performance, and operational testing.
Added 3 days ago
ET
Test Automation Engineer
Envision Technology Solutions
Toronto, ON
- Contract
Support functional, performance, backup and recovery, and disaster recovery testing.
Added 3 days ago
TI
BSA with RPA & Power Platform
Themesoft Inc.
Toronto, ON
- Contract
Define clear use cases, acceptance criteria, test conditions, and expected results for functional, UAT, performance, and operational testing.
Added 3 days ago
BI
Analyste principal, Implantation Epicor / Senior Analyst, Epicor Implementation
Balcan Innovations Inc.
Montreal, QC · Greater Montreal Metropolitan Area
- Full-time
Translate Finance and Operations requirements into functional specifications, business rules, and system configurations.
Added 3 days ago
SS
GPU & AI Optimization Engineer
Sapphire Stream Technology
Toronto, ON · Greater Toronto Area, Canada
- Full-time
…improve engineering productivity, and collaborating with cross-functional engineering teams to enhance software performance, computational efficiency, and power…
Added 3 days ago
A
Technology Change Manager
Airswift
Calgary, AB
- Contract
Facilitate cross-functional discussions, resolve ambiguity and competing priorities, and drive decisions and commitments to closure.
Added 3 days ago
TR
D365 Developer
Tenth Revolution Group
Mississauga, ON
- $80,000 to $110,000 CAD / year
- Full-time
Support application lifecycle activities including development, testing, deployment, and ongoing maintenance.
Added 3 days ago
BE
Director, Project Management
Blackstone Energy
Toronto, ON
- Full-time
…Specialist team) of the design, engineering, installation, start-up, functional testing and commissioning of central utility plants, HVAC, building automation, renewable energy, energy…
Added 3 days ago
Digital & eCommerce Specialist
Brewers Retail Inc
Bolton, ON
Partner with cross-functional teams and external vendors to support platform performance, compliance, issue resolution, content updates, and continuous improvement initiatives
Added 3 days ago
B
Senior Manager, Physical Security
BGIS
Markham, ON
- Full-time
Collaborate with internal and external concerned parties to ensure corporate access and security systems are functional and effective as per ISO 27001 standards and client requirements…

Sapphire Stream Technology

GPU & AI Optimization Engineer

Toronto, ON, Canada
Greater Toronto Area, Canada, Canada

Full-time

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Job details

Job type: Full-time
Apply by: Dec 4, 2026
Posting language: English
Posted: Nov 4, 2026

Original job description

About Sapphire Stream Technology

Sapphire Stream Technology (SST) is a technology and engineering solutions company specializing in software development, AI and machine learning, semiconductor technologies, automotive solutions, and advanced engineering services.

We collaborate with leading global technology companies to deliver innovative engineering solutions and support the development of next-generation products.

As we continue to expand our presence in North America, we are looking for talented engineers who are passionate about emerging technologies, solving complex technical challenges, and contributing to advanced AI and computing solutions.

Position Overview

SST is seeking a Machine Learning Software Engineer – GPU & AI Optimization to join our growing engineering team in Markham, Ontario.

The successful candidate will work on advanced machine learning software development, GPU computing, and performance optimization for next-generation computing platforms.

This role involves developing and optimizing machine learning kernels, leveraging agentic AI workflows to improve engineering productivity, and collaborating with cross-functional engineering teams to enhance software performance, computational efficiency, and power optimization.

We are looking for an enthusiastic, technically strong individual who enjoys working on complex engineering challenges and exploring innovative approaches to AI and GPU software development.

Key Responsibilities

Develop, implement, and optimize machine learning software, GPU kernels, and computational workloads for advanced computing platforms.
Leverage agentic AI tools and workflows to accelerate software development, testing, debugging, and optimization.
Support software and workload development across pre-silicon and post-silicon development environments.
Design and maintain efficient machine learning kernels, kernel fusion techniques, and performance optimization solutions.
Develop clean, maintainable, and testable C++ and Python code, including microbenchmarks and automated regression tests.
Optimize GPU execution parameters, including tile sizes, block configurations, and memory layouts, to improve latency, throughput, and power efficiency.
Support runtime integration, deployment, and performance tuning across machine learning inference frameworks and computing platforms.
Analyze GPU performance using profiling tools and performance metrics to identify bottlenecks and optimization opportunities.
Collaborate with software, hardware, runtime, and machine learning engineering teams to improve system-level efficiency.
Participate in technical design discussions, code reviews, debugging, and continuous improvement initiatives.
Contribute to the development of innovative engineering solutions for emerging AI and high-performance computing applications.

Required Qualifications

Bachelor's or Master's degree in Computer Science, Computer Engineering, Software Engineering, Computer Systems, or a related technical discipline.
Strong programming proficiency in C++ and Python.
Solid understanding of software engineering principles, algorithms, data structures, and performance optimization.
Knowledge of machine learning concepts, numerical computing, and linear algebra.
Experience developing, debugging, and testing complex software applications.
Strong analytical and problem-solving abilities.
Excellent communication, collaboration, and teamwork skills.
Ability to work effectively in a fast-paced, collaborative engineering environment.

Preferred Qualifications

Practical experience using agentic AI workflows, AI coding assistants, or AI-driven development tools to improve engineering efficiency.
Experience with GPU computing or parallel programming technologies such as CUDA, HIP, or OpenCL.
Familiarity with GPU graphics programming technologies such as DirectX or Vulkan.
Experience developing and optimizing machine learning kernels and GPU-accelerated workloads.
Understanding of machine learning architectures, including Transformers, U-Nets, and Convolutional Neural Networks (CNNs).
Familiarity with pre-silicon software development or hardware emulation platforms such as FPGA, ZeBu, or Veloce.
Experience with performance profiling tools and GPU performance metrics, including occupancy, memory bandwidth, FLOPs, and roofline analysis.
Knowledge of kernel fusion, memory optimization, parallel execution, and high-performance computing.
Experience with machine learning inference frameworks, runtime integration, or production software deployment.
Exposure to hardware-software co-optimization and power-efficient computing.

Why Join SST?

Work on advanced AI, machine learning, and GPU computing technologies.
Contribute to challenging engineering projects involving next-generation computing platforms.
Collaborate with experienced engineering professionals and global technology teams.
Gain exposure to emerging technologies in semiconductor engineering and high-performance computing.
Be part of SST's growing North American engineering organization.

Work Location

Markham, Ontario, Canada – Onsite

This position requires working onsite and collaborating closely with engineering teams.

Equal Opportunity Employer

Sapphire Stream Technology is committed to providing an inclusive and respectful workplace. Employment decisions are based on qualifications, experience, and business requirements, in accordance with applicable employment and human rights legislation.

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More about this job

Responsibilities

Develop and optimize machine learning software, GPU kernels, and workloads, including kernel fusion, execution parameters, and memory layouts, to improve performance and power efficiency. Use AI-assisted workflows and profiling tools, support development across pre- and post-silicon environments, and collaborate with software, hardware, runtime, and machine learning teams.

Requirements

A bachelor's or master's degree in computer science, computer engineering, software engineering, computer systems, or a related discipline is required, along with strong C++ and Python skills. Candidates should understand software engineering, algorithms, data structures, machine learning, numerical computing, and linear algebra, and have experience developing, debugging, and testing complex software.

Skills

C++
Python
GPU Computing
CUDA
HIP
OpenCL
Machine Learning
GPU Kernel Optimization
Performance Profiling
Parallel Programming
Linear Algebra
Kernel Fusion
AI Coding Assistants
DirectX
Vulkan
Performance Optimization

Visa sponsorship

Not detected in the job text

Keywords

C++
Python
GPU Computing
CUDA
HIP
OpenCL
DirectX
Vulkan
Machine Learning
GPU Kernels
Kernel Fusion
Agentic AI Workflows
AI Coding Assistants
Performance Profiling
Occupancy
Memory Bandwidth
FLOPs
Roofline Analysis
Pre-Silicon Development
Post-Silicon Development
FPGA
ZeBu
Veloce
Machine Learning Inference
Transformers
U-Nets
Convolutional Neural Networks
High-Performance Computing
Hardware-Software Co-Optimization
Power-Efficient Computing

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