Principal Machine Learning Engineer

WillHire

. Design and build the core ML systems behind Workday’s next generation of AI agents .

Posted 5/8/2026full-timeToronto • 🇨🇦 CanadaLead💰 CA$188,000 - CA$282,000 per yearWebsite

Tech Stack

Tools & technologies

AWSCloudGoogle Cloud PlatformPyTorchTensorflow

About the role

Key responsibilities & impact

Design and build the core ML systems behind Workday’s next generation of AI agents
Own how models, agent logic, and orchestration layers come together in production
Implement and evolve frameworks for LLM-powered agents, ensuring solutions are scalable, observable, and enterprise-ready
Partner closely with software engineers, product managers, and data scientists to integrate agents deeply into the Workday stack
Stay hands-on with emerging techniques in agentic architectures

Requirements

What you’ll need

10+ years experience as a member of a data science or machine learning engineering team building applied machine learning products at scale
4+ years of professional experience in machine learning and deep learning frameworks & toolkits such as Pytorch, TensorFlow
6+ years of professional experience in building services to host machine learning models in production at scale
3+ years of demonstrated experience working with large language models (LLMs), text generation models, and/or graph neural network models for real-world use cases
6+ years of proven experience with cloud computing platforms (e.g. AWS, GCP)
Proven track record of successfully leading, mentoring, and/or managing ML Engineering teams
Bachelor's (Master’s or PhD preferred) degree in engineering, computer science, physics, math or equivalent

Benefits

Comp & perks

Workday Bonus Plan or role-specific commission/bonus
Annual refresh stock grants
Flexible work arrangements

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

machine learningdeep learningPytorchTensorFlowlarge language modelstext generation modelsgraph neural networkscloud computingscalable solutionsenterprise-ready frameworks

Soft Skills

leadershipmentoringteam managementcollaborationcommunication

Certifications

Bachelor's degreeMaster's degreePhD