Principal Machine Learning Engineer

🔥 0 minutes ago

🇺🇸 United States – Remote

💵 $285.8k - $457.3k / year

⏰ Full Time

🔴 Lead

🤖 Machine Learning Engineer

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HubSpot

WebsiteLinkedInAll Job Openings

1001 - 5000 employees

Founded 2006

🤝 B2B

☁️ SaaS

📣 Marketing

B2B • SaaS • Marketing

HubSpot is an AI-powered customer platform that combines marketing, sales, and customer service software into one integrated suite. With over 238,000 customers in 135 countries, HubSpot offers tools for marketing automation, sales management, customer service, content marketing, operations, and B2B commerce. With products like Marketing Hub, Sales Hub, Service Hub, and Content Hub, HubSpot enables businesses to generate leads, close deals, and provide excellent customer support, all while using AI to enhance operations and insights. The platform is designed to unify teams and customer data, supporting both small startups and large enterprises in their growth journey.

📋 Description

• Build infrastructure for agent runtime, evaluation, quality measurement, and model optimization • Create tooling to identify evaluation strengths, coverage gaps, and unsupported user questions • Design signal pipelines to surface user frustration, agent failure states, and quality issues • Help define a HubSpot-specific AI benchmark using real HubSpot workloads • Build systems to evaluate new models across agents, improve product quality, reduce cost, and support model routing • Make fine-tuning and task-specific optimization repeatable for HubSpot AI use cases • Help set the technical direction for evaluating, improving, and scaling AI agents across HubSpot

🎯 Requirements

• Deep experience with production ML, LLM, or AI infrastructure • Experience building systems at scale where reliability, latency, quality, and cost matter • Platform-oriented problem-solving rather than one-off solutions • Ability to work across infrastructure, product, backend, and ML teams • Experience with eval frameworks, model serving, fine-tuning, signal extraction, experimentation, feedback loops, or model optimization • Ability to handle ambiguous, foundational problems • Ability to influence senior engineers and leaders through technical credibility and clear judgment

🏖️ Benefits

• Annual bonus targets under HubSpot’s bonus plan for eligible roles • Equity plan eligibility, including restricted stock units (RSUs), for eligible roles • Overtime pay eligibility for some roles • Benefits and perks to help employees grow better • Flexible work arrangements • In-person onboarding and team events, with accommodations available for travel limitations or other reasons