Sr. Machine Learning Engineer I

HubSpot's Agent Platform team is building Breeze Studio, a custom agent creation product that lets customers define, deploy, and improve AI agents. As a Machine Learning Engineer on the Agent Orchestration ML team, you'll own the models and systems that determine whether those agents are any good. You'll design and run experiments to improve agent quality, build and maintain evaluation infrastructure, optimize LLM inference, and more.

Requirements

• 5+ years of experience in a dedicated ML Engineer role
• Strong Python skills and experience with PyTorch, VLLM, DSPy or similar LLM optimization frameworks
• Hands-on experience working with large language models in production
• Ability to move from ambiguous problem to experimental design to shipped improvement
• Comfort working with limited supervision in an early-stage product environment

Benefits

• Cash compensation
• On-target commission for eligible roles
• Annual bonus targets under HubSpot's bonus plan for eligible roles
• Eligibility to participate in HubSpot's equity plan to receive restricted stock units (RSUs)
• Overtime pay for some roles
• Benefits and perks