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Added 8 mins ago
Moncton Building Systems Operator (2068) PCN 1000787
Horizon Health Network
Moncton, NB · Greater Moncton Metropolitan Area
Full-time
Must hold a valid 4th class power engineer’s license in accordance with the Boiler and Pressure Vessel Act or any equivalent combination of training and experience.
Added 8 mins ago
Senior Engineer, Power Transformer Services
Kinectrics
Toronto, ON
Contract
Position: Senior Engineer, Power Transformer Services
Added 36 mins ago
Senior Software Engineer
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Toronto, ON
Full-time
The work is greenfield in the places that count. You'll define the data structures that power rollup reporting for multi-location operators and design a permissions and authorization system…
Added 36 mins ago
Software Engineer
7shifts
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Full-time
The work is greenfield in the places that count. You'll contribute to defining the data structures that power rollup reporting for multi-location operators and help build a permissions and…
Added 37 mins ago
Silicon Design Engineer
Advanced Micro Devices, Inc
Markham, ON
Full-time
At AMD, we believe technology has the power to solve the world’s most important challenges. From advancing healthcare and scientific discovery to powering AI and the technologies people…
Added 37 mins ago
RTL/Firmware Design Engineer
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Silicon Design Engineer
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Added 52 mins ago
Millwork Engineer / CNC Programmer
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Full-time
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Added 1 hour ago
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Full-time
Reporting to the Chief Power Engineer, this position operates the steam boilers as well as the High-Pressure boiler for the deodorizer, the deodorizer vacuum system refrigeration equipment,…
Added 1 hour ago
Software Engineer, GPU Performance
HeyGen
Toronto, ON
…Avatar, and Video Translation. We’re looking for a Software Engineer focused on GPU performance to make the systems behind these experiences faster and more…
Added 1 hour ago
Senior Building Operator
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…commercial high-rise building operations. You hold a valid 4th Class Power Engineer Certificate or Building Operator Certificate in good standing with ABSA, or are working toward your 4th…
Added 1 hour ago
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Kinectrics
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Added 2 hours ago
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Bolton, ON
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Our Development Engineering team is looking to hire an experienced Product Development Engineer. The successful candidate will lead the technical development of packaging products working…
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As a Senior ASIC (Front End) Design Engineer, you will be responsible for all aspects of digital SoC design, from micro-architecture specification, RTL, verification, synthesis, lint, CDC,…
Added 3 hours ago
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…infrastructure, AI native, scalable, and developer-friendly systems that power analytics, AI, real-time insights, and customer-facing experiences across…
Added 3 hours ago
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Added 3 hours ago
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Toronto, ON
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Experience administering and supporting Linux, Unix, and Windows operating systems.
Added 3 hours ago
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$118,300 to $168,300 CAD / year
…company's games - Central Technology! As a Principal Software Engineer, you will be responsible for the technical vision, design and implementation of AI-powered tools and systems that…

HeyGen

Software Engineer, GPU Performance

Toronto, ON, Canada

Posting language: English
Posted: Sep 28, 2026

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Original job description

About HeyGen

At HeyGen, our mission is to make visual storytelling accessible to all. Over the last decade, visual content has become the preferred method of information creation, consumption, and retention. But the ability to create such content, in particular videos, continues to be costly and challenging to scale. Our ambition is to build technology that equips more people with the power to reach, captivate, and inspire audiences.
Learn more at www.heygen.com. Visit our Mission and Culture doc here.

Position Summary

HeyGen is building AI applications including Avatar IV, Photo Avatar, Interactive Avatar, and Video Translation. We’re looking for a Software Engineer focused on GPU performance to make the systems behind these experiences faster and more efficient.

You will work across model execution and inference infrastructure, using profiling and measurement to improve latency, throughput, and GPU cost. This role is a fit for an engineer who enjoys understanding how software uses the hardware beneath it.

Key Responsibilities

Use NVIDIA Nsight Systems, Nsight Compute, and PyTorch Profiler to investigate GPU utilization, kernel execution, memory bandwidth, and CPU–GPU data movement.
Identify bottlenecks across model execution, preprocessing, and inference serving, then measure the impact of each optimization.
Improve performance through batching, scheduling, memory management, and better GPU utilization.
Develop or integrate high-performance GPU kernels when existing implementations limit performance.
Build benchmarks and automated checks that catch performance regressions across representative video workloads.
Collaborate with AI researchers and infrastructure engineers to bring optimizations into production.
Measure the effect of changes on latency, throughput, cost, and output quality.

Qualifications

Experience optimizing GPU-based AI workloads or high-performance computing systems.
Proficiency in Python and experience with PyTorch or a similar machine learning framework.
Strong curiosity about GPU hardware, including memory bandwidth, cache behavior, tensor cores, and data movement between CPU and GPU.
Experience using profiling tools to connect hardware behavior to application-level bottlenecks and validate improvements.
Ability to turn performance experiments into reliable production changes and communicate tradeoffs clearly.

Preferred Qualifications

Experience with CUDA, Triton, or C++ GPU programming.
Experience optimizing video, image, audio, diffusion, or Transformer models.
Familiarity with multi-GPU inference, GPU interconnects, quantization, or large-scale model serving.
Experience building performance benchmarks or regression testing infrastructure.
Prior experience in a fast-paced technology environment.

What HeyGen Offers

Competitive salary and benefits package.
Dynamic and inclusive work environment.
Opportunities for professional growth and advancement.
Collaborative culture that values innovation and creativity.
Access to the latest technologies and tools.

HeyGen is an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.

Join us at HeyGen

Help us make AI video faster and more accessible. We’d love to hear from you.

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More about this job

Responsibilities

The engineer will optimize GPU performance for AI applications by identifying bottlenecks in model execution and inference infrastructure. They will develop high-performance kernels and implement optimizations to improve latency, throughput, and GPU cost.

Requirements

Candidates must have experience optimizing GPU-based AI workloads and proficiency in Python with machine learning frameworks. Strong knowledge of GPU hardware architecture and experience with profiling tools are essential for this role.

Skills

GPU performance optimization
Python
PyTorch
NVIDIA Nsight Systems
NVIDIA Nsight Compute
PyTorch Profiler
CUDA
Triton
C++
Inference infrastructure
Memory management
Performance benchmarking
Kernel execution
Quantization
Transformer models

Benefits

Competitive salary
Professional growth opportunities
Inclusive work environment
Access to latest technologies

Visa sponsorship

Not detected in the job text

Keywords

Software Engineer
GPU Performance
AI
Avatar
Inference
Latency
Throughput
NVIDIA Nsight
PyTorch
Memory Bandwidth
Kernel Execution
Batching
Scheduling
CUDA
Triton
C++
Diffusion Models
Transformer Models
Multi-GPU
Quantization
Regression Testing
Profiling
Hardware
Data Movement
Tensor Cores

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