HubSpot Product Blog the engineering blog of HubSpot: latest posts and feed

Aug 14

Incident Report: July 22, 2026

Jun 30

Building Observable Access Control at Scale: A Rule Engine Approach to JITA

The Problem At HubSpot, we have a fundamental tension built into our culture: we want to help customers succeed, which often means giving employees access to customer portals: Engineers to fix bugs, sales engineers assisting with account...

Jun 25

Building the AI Retrieval Infrastructure Behind 20 Billion+ Vectors at HubSpot

Mar 20

HubSpot Incident Report: February 25, 2026

On February 25, 2026, HubSpot experienced a service disruption affecting user access to specific types of workflows within our user interface.

Mar 2

Automated Code Review: The 6-Month Evolution

As HubSpot engineers have increasingly started writing more and more of their code with both local and cloud coding agents, we've noticed that now more than ever, code review is taking up a large portion of cycle time on new changes.

Jan 23

Cloud Coding Agents at HubSpot

This post is the second in a series about empowering product, UX, and engineering teams with AI, especially in the context of writing code. Read the first post about scaling AI adoption here !

Nov 13, 2025

Moving Mountains: How We Migrated from Enzyme to React Testing Library

For years, Enzyme was the de facto standard for testing React applications. Originally built by Airbnb in 2015, Enzyme makes it easy to assert, manipulate, and traverse the output of React components.

Nov 11, 2025

HubSpot Incident Report for October 20, 2025

On October 20, 2025, HubSpot experienced a significant service disruption affecting multiple product features due to a severe AWS outage in the us-east-1 region.

Sep 24, 2025

Context is Key: How HubSpot Scaled AI Adoption

This post is intended to be the first in a series about empowering product, UX, and engineering teams with AI. We’re going to focus on how we’ve approached and scaled the use of AI in the context of writing code.

Sep 24, 2025

It's Never a Hardware Bug, Until it is

​​ Edit, April 30 2026: The OpenJDK now contains a mitigation for the hardware bug described in this article, which will appear in OpenJDK 27. Thank you to Evgeny Astigeevich at AWS for his work on the mitigation.