HubSpot has become a leading platform for CRM, marketing automation, and customer experience management. As companies increasingly customize HubSpot using APIs, CMS, and integrations, the demand for HubSpot Developers is rising rapidly.
If you’re preparing for a HubSpot Developer interview, this blog will help you master core concepts, real-world use cases, and technical depth expected by hiring managers.
A HubSpot Developer customizes and extends HubSpot functionality using:
They work closely with marketing, sales, and operations teams to build scalable CRM solutions.
HubSpot provides several developer-focused components:
These allow developers to build custom websites, apps, and integrations.
HubSpot CMS is a cloud-based, CRM-connected CMS that enables:
Unlike traditional CMSs (like WordPress), HubSpot CMS is natively integrated with CRM and marketing tools, eliminating the need for plugins.
HubL (HubSpot Markup Language) is a server-side templating language used in HubSpot CMS.
It allows developers to:
HubSpot APIs allow developers to:
Common APIs include:
| Feature | Private App | Public App |
|---|---|---|
| Usage | Internal use | Marketplace |
| Authentication | Access Token | OAuth |
| Distribution | Single account | Multiple accounts |
| Approval | No | Yes (HubSpot review) |
OAuth is an authorization framework that allows apps to access HubSpot data securely without sharing credentials.
HubSpot uses OAuth mainly for:
Custom Objects allow businesses to store non-standard CRM data such as:
Developers can define relationships between standard and custom objects.
Steps:
Custom objects are widely used in complex CRM implementations.
Webhooks allow HubSpot to send real-time data to external systems when an event occurs, such as:
They are commonly used for real-time integrations.
Workflows automate actions based on triggers.
Examples:
Developers often use workflows alongside APIs for automation.
HubSpot CLI is a command-line tool that allows developers to:
It improves version control and development speed.
CMS Modules are reusable components such as:
Modules can be:
Personalization is achieved using:
Example use cases:
Themes are collections of:
Themes help developers build consistent, brand-aligned websites efficiently.
Security measures include:
HubSpot enforces strong API security standards.
| REST API | Webhooks |
|---|---|
| Pull-based | Push-based |
| Manual requests | Automatic triggers |
| Used for CRUD | Used for events |
| Polling required | Real-time updates |
HubSpot enforces API rate limits to prevent abuse.
Best practices:
429 errors gracefullyYes. HubSpot integrates with:
Developers use APIs, middleware, or iPaaS tools for integrations.
Sandbox is a testing environment that allows developers to:
It prevents risks to production data.
Developers use:
These help identify issues quickly.
Smart Content changes dynamically based on:
It enhances personalization and conversion rates.
HubSpot supports:
Developers manage translations using CMS tools.
Key skills include:
HubSpot Developer roles offer:
Preparing for a HubSpot Developer interview requires both technical expertise and platform understanding. These top 25 questions cover core fundamentals, advanced integrations, CMS development, and real-world scenarios commonly asked by recruiters.
If you're a fresher or transitioning into marketing technology, mastering these concepts will give you a strong competitive edge.