Applied behavior analysis Jobs in Toronto, ON

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About the role and the team:

As an Applied Researcher 1 within the Computer Vision team, you will contribute to advancing eBay’s vision and multimodal capabilities for large-scale applications. You will work on training, fine-tuning, evaluation, and deployment of models across problem spaces including search, recommendations, content generation, and video understanding. This role is a hands-on researcher role where you will contribute across key stages of projects, apply rigorous methodology, and help bring high-quality ML solutions from idea to production.

What you will accomplish:

• Develop and deploy computer vision or multimodal machine learning models for production applications across search, recommendations, content generation, and video.
• Contribute across key stages of research and applied ML projects, from problem framing and data preparation through experimentation, evaluation, implementation, and productionization.
• Build and improve training, inference, and evaluation pipelines for modern AI systems, including workflows that orchestrate multiple models and services.
• Apply strong experimental methodology and scientific rigor to model development, including metric design, offline and online evaluation, error analysis, and ablation studies.
• Contribute to core capabilities in classical and modern vision or multimodal problem spaces such as detection, segmentation, classification, contrastive learning, visual-language modeling, and multimodal retrieval.
• Build and improve agentic or VLM-powered pipelines that combine foundation models, retrieval, tools, and business logic to deliver scalable user and seller experiences.
• Partner with product managers, engineers, designers, and researchers to translate business opportunities into practical ML solutions.
• Communicate progress, technical trade-offs, and results clearly to cross-functional stakeholders.

Qualifications:

• Ph.D. or M.S. in Computer Science, Electrical Engineering, Machine Learning, Artificial Intelligence, Applied Mathematics, or a related technical field with a focus on computer vision, multimodal learning, or artificial intelligence.
• 1 or more years of experience building computer vision and/or multimodal systems for large-scale applications, ideally in one or more of the following areas: search, recommendations, video or live streaming.
• Strong understanding of classical computer vision and/or multimodal learning techniques, including detection, segmentation, classification, representation learning, and contrastive learning.
• Hands-on experience training, fine-tuning, evaluating, and deploying visual-language models, or other modern foundation-model-based systems, including familiarity with the broader modern AI stack used to develop, adapt, optimize and operationalize multimodal models.
• Practical experience with agentic AI workflows and/or VLM-powered pipelines in applied or production settings.
• Experience with rigorous experimentation, evaluation methodology, and data-driven model iteration.
• Proficiency in Python and modern ML/data frameworks such as PyTorch and TensorFlow, with fluency in agentic coding and AI-assisted development workflows.
• Strong written and verbal communication skills, with the ability to collaborate effectively across research, engineering, and product organizations.
  

Additional Details

The base pay range for this position is expected in the range below:

C$118,000 - C$157,500

Base pay offered may vary depending on multiple individualized factors, including location, skills, and experience. The total compensation package for this position may also include other elements, including a target bonus and restricted stock units (as applicable) in addition to a full range of medical, financial, and/or other benefits (including RRSP eligibility, various paid time off benefits, such as PTO and parental leave). Details of participation in these benefit plans will be provided if an employee receives an offer of employment.

This job posting relates to an existing vacancy within eBay.

eBay is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, sex, sexual orientation, gender identity, and disability, or other legally protected status. If you have a need that requires accommodation, please contact us at . We will make every effort to respond to your request for accommodation as soon as possible. View our to learn more about eBay's commitment to ensuring digital accessibility.

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