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Senior Lead Machine Learning Engineer Role

Upwork Inc.

toronto, on, Canada Full-time June 08, 2026

Found Description

Lead the future of AI at Upwork as a Senior Lead Machine Learning Engineer. Architect and scale innovative agentic intelligence while managing end-to-end development of AI agents and platforms.
In this hands-on role, you will oversee the development of multi-agent systems, leveraging advanced machine learning techniques on Upwork's platform. Your responsibilities span across LLM training, interoperability with developer tools, and establishing robust specifications for agent performance and safety. Be prepared to collaborate closely with research and engineering teams to create advanced agentic solutions.
Key Responsibilities:
• Design multi-agent systems with planning, memory, and critique capabilities
• Drive LLM training, alignment, and evaluation for agents
• Engineer reliable, low-latency backend systems for event-driven services
• Implement policy-driven guardrails and data governance strategies
• Mentor and guide cross-functional teams on agent development

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