Jiuyang Joey Bai

About Jiuyang Joey Bai

I’m a Senior Machine Learning Engineer at HubSpot, specializing in generative AI and LLMs to enhance CRM workflows. With a PhD in Cognitive Science from Brown University, I’ve developed vision-based models for collision avoidance and led enterprise ML platforms at CVS Health, driving $500M in cost savings. My expertise spans Python, Machine Learning, and AI Agent, with a passion for mentoring teams and innovating AI solutions. Let’s connect to discuss AI-driven innovation!

Experience

1. Senior Machine Learning Engineer

   HubSpot

   May 2025 — Present · Cambridge, MA, US

   Design and develop AI agent models, leveraging generative AI and large language models (LLMs) to power Breeze Agents, enabling automated workflows for content marketing, sales prospecting, and customer engagement across HubSpot’s CRM platform.• Build and optimize machine learning pipelines, implementing pre-training, fine-tuning, and retrieval-augmented generation (RAG) techniques to enhance AI agent performance and deliver personalized customer experiences.• Mentor and guide junior engineers, fostering a collaborative, high-performing AI team culture while sharing expertise in machine learning and AI agent development.

Education

• Brown University

  Master of Science - MS, Computer Science

• Zhengzhou University

  Bachelor of Science - BS, Applied Psychology

• Illinois State University

  Master of Science - MS, Cognitive Psychology

• Brown University

  Doctor of Philosophy - PhD, Cognitive Science