Principal Machine Learning Engineer
Core
Set technical direction for the intelligence layer powering ZoomInfo AI agents, focusing on the data graph, entity resolution, and buying intent.
Role type
Principal Machine Learning Engineer (Strategy & Hands-on IC)
Builds
The data graph, entity resolution systems, buying intent signals, and agent context for ZoomInfo's AI agents.
Domain
B2B SaaS / AI / Knowledge Graphs / Large Scale Data
Deliverable
production ML models
Required skills
Technical strategy for multi-team areas, classical ML on tabular data, applied statistics, language processing at scale, LLM agents, evaluation standards (LLM judges, human labels), cost/capacity decisions for model training/serving, Python, SQL, distributed data processing, AI coding tools
Preferred skills
Ranking and retrieval (embeddings, learned re-ranking), entity resolution, knowledge graphs, web-scale information extraction, open-weight models (PyTorch), GPU capacity planning, user memory/context systems for agents, adversarial input defense
Technologies
Python, SQL, PyTorch, LLMs, AI coding tools
Responsibilities
Set technical strategy for data graph and agent context, frame and ship novel problems (e.g., extraction for companies with no public footprint), define evaluation standards and release gates, define data contracts between graph and agents, establish group-wide baselines and metrics, lead design reviews and mentor senior engineers
Seniority
Principal, strategy & mentorship
