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Principal Machine Learning Engineer

Flex - Cambridge, Massachusetts

$285,800 - $457,300 a year

Senior

Data and AI

Source checked 2 hours ago.

Posted 2 days ago.

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HubSpot is an all-in-one marketing, sales, and service software platform that helps businesses grow and succeed.
With a user-friendly interface and powerful tools, HubSpot enables businesses to attract, engage, and delight customers, ultimately driving growth and increasing revenue.
From marketing automation to CRM, HubSpot offers a comprehensive solution that empowers businesses to succeed in the digital age.

HubSpot is building the foundational AI infrastructure that powers our next generation of agentic product experiences.
We're looking for a Principal Machine Learning Engineer to help shape the base layer that product teams build on: agent runtime, evaluation systems, quality signals, model optimization, fine-tuning, and model routing.
This team owns Breeze Engine , the platform behind Breeze Assistant and other AI-powered product experiences, as well as Aviator , HubSpot's internal framework for building and running agents.
This is not a feature-team role it is a high-scope infrastructure role focused on building systems that create leverage across the company.

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