Principal Machine Learning Engineer
DataJobs
Cambridge, MA · $286k a year · Posted October 22, 2026
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Pay compared with the market
This listing pays about $285,800 a year. Across 50 open principal machine learning engineer listings that state pay, the middle half runs $214,500 to $313,500 and the median is $274,000. That is inside the middle half of those listings, 4% above the median.
Listed pay is what employers advertise, not what people are paid.
Principal Machine Learning Engineer salaries by state · Check your own pay
About the job
...The Principal Machine Learning Engineer role at HubSpot focuses on building foundational AI infrastructure for agentic product experiences. You will help design and scale systems that improve evaluation, quality, and cost efficiency across HubSpot’s agent platforms....