Senior Lead Machine Learning Engineer, Agentic AI

Upwork is seeking a Senior Lead Machine Learning Engineer to architect, ship, and scale the next generation of agentic intelligence across Upwork. The successful candidate will lead end-to-end development of AI agents and the platform that powers them, including LLM training and evaluation, runtime orchestration, safety, and developer APIs.

Requirements

• Build Agentic Intelligence
• Develop protocol-aware agents and services
• Own reliability at scale
• Train, Align, and Evaluate LLMs for Agents
• Stand up evaluation harnesses
• Build policy-driven guardrails
• Engineer Agentic Platform Backend Infrastructure
• Ship production-grade services
• Optimize cost/performance
• Lead, Partner, and Uplevel the Ecosystem

Benefits

• Competitive benefits through a partner
• Opportunities to transition to employment with Upwork