Upwork Inc.

Lead Machine Learning Engineer at Upwork

📍 Location
toronto, on
⏰ Job Type
Full-time
📅 Posted
June 13, 2026

Job Description

Join Upwork as a Lead Machine Learning Engineer to innovate in AI. Focus on architecting and scaling agent intelligence systems while ensuring high performance and safety standards.
This senior role requires hands-on development of AI agents, including architecture design, performance metrics, and training strategies for language models. You will take responsibility for creating a platform that integrates developer tools and defines data governance policies. Your influence extends across teams, ensuring successful outcomes through mentorship and technical leadership.
Key Responsibilities:
• Create and implement multi-agent systems with effective guardrails
• Lead training and evaluation for large language models
• Architect backend solutions for seamless agent operation
• Collaborate with legal on data governance and privacy policies
• Document strategies and share best practices for team learning
Requirements:
• 8–12+ years in applied machine learning, focus...

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