Staff Machine Learning Engineer (Toronto)

OVERVIEW OF THE COMPANY

Fox Corporation

Under the FOX banner, we produce and distribute content through some of the world’s leading and most valued brands, including: FOX News Media, FOX Sports, FOX Entertainment, FOX Television Stations and Tubi Media Group. We empower a diverse range of creators to imagine and develop culturally significant content, while building an organization that thrives on creative ideas, operational expertise and strategic thinking.

JOB DESCRIPTION

AdRise is FOX's core ad tech platform, built to unify streaming and linear advertising across Tubi, FOX Sports, FOX News Media, and FOX Entertainment. Before AVOD became industry standard, AdRise helped power Tubi's growth from the ground up by developing real-time ad delivery and dynamic targeting infrastructure that scaled to serve millions. That same tech foundation is now fueling FOX's cross-portfolio monetization strategy.

We are rebuilding the ad stack for video by optimizing server-side delivery, building ML-driven targeting systems, and enabling content-personalized ad experiences that respond to what viewers actually watch. From real-time decisioning to data collaboration with AWS and Snowflake, we are creating a smarter, more dynamic ad tech ecosystem. The problems are complex, the visibility is high, and the platform is built for impact. If you want to work at the center of streaming monetization on systems that touch billions of impressions and shape the next generation of personalized advertising, this is your platform.

ABOUT THE ROLE
As a Staff ML Engineer at AdRise, you’ll play a hands-on leadership role in building and scaling our machine learning infrastructure. You’ll design real-time ML systems that power auction dynamics, yield optimization, identity resolution, and forecasting—all under strict latency constraints. Working alongside the Director of ML and a growing team, you’ll help shape the technical roadmap and bring new models to life in production environments at massive scale.

A SNAPSHOT OF YOUR RESPONSIBILITIES

• Design and deploy low-latency ML pipelines for real-time bidding and ad delivery
• Build scalable systems for forecasting, yield optimization, and media planning
• Collaborate with data engineering teams to integrate third-party data and behavioral signals
• Drive experimentation through A/B testing and continuous model optimization
• Define architecture standards and tooling for MLOps, retraining workflows, and model monitoring
• Mentor senior and junior engineers across ML engineering best practices
• Evaluate third-party tools and platforms to inform build-vs-buy decisions
• Own performance metrics tied to business impact: eCPM, ROAS, fill rate, etc.

WHAT YOU WILL NEED

• 8+ years in ML or data engineering roles, with at least 2+ years in high-scale, real-time systems
• Proficiency in Python, TensorFlow/PyTorch, and production ML tooling (e.g., Airflow, Spark, MLflow)
• Experience deploying ML systems with sub-100ms latency in adtech or streaming contexts
• Strong background in MLOps: retraining workflows, model versioning, pipeline orchestration
• Familiarity with AWS, Kubernetes, and CI/CD frameworks
• Ability to translate business goals into measurable model outcomes

NICE TO HAVE, BUT NOT A DEALBREAKER

• Prior experience in adtech or AVOD platforms
• Familiarity with identity resolution, lookalike modeling, and auction theory
• Exposure to tools like Snowflake, LiveRamp, or AWS Clean Rooms

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