Principal Machine Learning Engineer
ZoomInfo Technologies LLC · Waltham
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- Company
- ZoomInfo Technologies LLC
- Location
- Waltham
- Salary
- $192,500 — $302,500
- Posted
- September 28, 2026
About this job
You'll build the intelligence every ZoomInfo AI agent reasons over — what's true about companies and the people in them, how they relate, and what they're buying. As a Principal Machine Learning Engineer, you will set technical direction for one or more of the hardest problems on the team: extending the B2B data graph into the long tail, resolving entity identity at scale, and reading buying intent from meaning rather than keywords. You'll own outcomes end to end, choosing classical machine learning, statistics, or language models based on what the problem calls for, not habit. What You'll Do You will extend ZoomInfo's data graph into the long tail of companies with little public footprint, extracting leadership, locations, and products from company websites and detecting stale records.…
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