Top Tech Jobs & Startup Jobs in Toronto

Design and implement state-of-the-art models for ranking, recommendations, personalization, and pricing. Develop core ML platform and feature engineering systems (Zipline). Productionize research models by building ETL/ELT workflows, inference pipelines, and deployment automation. Implement MLOps, model serving, monitoring, observability, and optimize model performance SLOs and system costs.

eBay is hiring ML Scientists to design state-of-the-art ranking, recommendation, personalization, and pricing models, and ML Engineers to productionize models by building ETL/ELT workflows, inference pipelines, MLOps infrastructure, deployment automation, monitoring, and cost/ performance optimization. Both roles contribute to feature engineering, model serving, observability, and maintaining production ML platform components like Zipline.

The Senior Systems Engineer will design and develop data applications, lead software development teams, oversee data integration projects, manage BI systems, and ensure optimized performance while collaborating across teams.

The Staff Full Stack Engineer will design, develop, and maintain scalable applications and APIs, lead architectural decisions, enhance advertising features using AI, and engage in technical discussions within an Agile team environment.

Own the strategy, vision, roadmap, backlog, and delivery of eBay Advertising’s ad reporting and measurement products. Partner with Engineering, Design, Analytics, Legal, Marketing, Finance, and Operations to provide sellers with actionable performance insights. Define goals, prioritize investments, manage dependencies, communicate with executives, and optimize products using customer insights, data, and business objectives.

Leads eBay’s enterprise UX research systems and operations strategy. Owns modernization of participant recruitment, panel management, incentives, compliance, research tooling, knowledge management, and operational infrastructure. Drives AI-enabled automation, self-service research, data quality, governance, and scalable customer insight capabilities. Builds and leads teams, develops multi-year transformation roadmaps, secures executive alignment and investment, and partners across Design, Product, Engineering, Legal, Privacy, Procurement, and Insights.

Design and build highly scalable, resilient distributed services and APIs for eBay's Shipping Platform. Optimize low-latency data pipelines, develop automated unit/integration/E2E tests, collaborate with product and operations, mentor engineers, and drive architectural and productivity improvements.

Lead eBay’s corporate strategy and cross-functional strategic projects, developing market differentiation strategies, competitive intelligence, business analyses, and implementation initiatives. Partner with executives and business teams, provide thought leadership, communicate recommendations, and mentor strategy professionals. The role requires strong analytical, structured-thinking, communication, collaboration, and executive leadership skills in a dynamic, uncertain environment.

Lead technical initiatives for eBay Live shopping platform, focusing on mobile development, mentoring engineers, and ensuring efficient project execution.

Lead federated GraphQL solution design and implementation using Node.js, Spring Boot, and DGS. Own critical production services, improving availability, resilience, throughput, query performance, security, and error handling. Partner with technical leaders and product teams to establish scalable API contracts, support GraphQL migrations, and promote federation and schema-design best practices. Prototype solutions, improve engineering processes, mentor team members, and influence platform architecture across eBay.