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Senior Lead Machine Learning Engineer, Agentic AI at Upwork | HireBase

Senior Lead Machine Learning Engineer, Agentic AI

Lisbon, Portugal

Posted February 3, 2026

Full Time

About the Company

No company description available.

Job Description

We are seeking a Senior Lead Machine Learning Engineer to architect, ship, and scale the next generation of agentic intelligence across Upwork.

Requirements

8–12+ years in applied ML/ML systems
4+ years building LLM‐powered products
Proven delivery of agentic workflows in production

Benefits

Competitive benefits
Growth opportunities

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Job Details

Employment TypeFull Time

Work TypeIn-Person

Languageen

Technologies

PythonGoJavaJavaScriptContainer orchestrationMessaging/streaming+1 more

Skills Required

LLM adaptationData curationSafety/guardrailsSoftware fundamentals (distributed systems, transactions, consistency, resiliency)Experience building high-throughput microservices/APIs/SDKsExperience designing eval suites for agents (task/rubric‐based, offline/online)

Categories

Other

Unity