What does a Hubspot developer do?
A Hubspot developer builds and extends applications on the HubSpot Developer Platform using APIs, webhooks, workflow actions, and related developer tooling. This role focuses on creating custom integrations that synchronize data between HubSpot and external systems while expanding the native capabilities of the CRM. Developers configure complex automation logic and build user interface extensions that tailor the platform to specific business requirements.
- Develop HubSpot integrations using REST APIs, OAuth, and webhooks to synchronize data across platforms. You authenticate connections securely and write code that pushes or pulls customer records between HubSpot and third-party software. This work ensures that sales and marketing teams access accurate, real-time information without manual entry.
- Create or configure custom workflow actions to extend what HubSpot workflows can do beyond standard triggers. You define file-based action definitions within an app project structure to connect internal business logic with automated processes. These custom actions allow teams to trigger external services or perform complex calculations when specific CRM events occur.
- Build HubSpot apps with the developer platform framework and deploy them using the HubSpot CLI. You design app projects that include APIs, webhooks, and UI extensions, then upload the completed project to the platform. This process packages your code into a functional application that users can install and configure within their HubSpot accounts.
- Define custom CRM data via custom objects and properties APIs to store integration-specific information. You structure these data models to support unique business needs that standard contact or company records cannot address. This capability allows organizations to track specialized entities and relationships directly within the HubSpot ecosystem.
- Extend the HubSpot user experience by building UI extensions within an app project. You code interface components that appear inside the CRM, giving users direct access to external tools or custom data views. These extensions streamline daily tasks by embedding necessary functionality directly into the workflow where teams already operate.
How to hire a Hubspot developer on Upwork
Step 1: Post a job
Define your integration needs clearly so candidates understand the technical scope. Use the Job Post Generator powered by Uma™, Upwork's Mindful AI to draft a precise description in seconds. Describe your requirements in a few sentences and Uma creates a structured post for this role. You can write a new post, update a saved draft, or reuse an existing one.
- Specify whether you need custom workflow actions, REST API integrations, or UI extensions within the HubSpot Developer Platform.
- List required tools such as the HubSpot CLI, OAuth authentication protocols, and webhook configuration experience.
- Clarify if the project involves building a new app from scratch using the Projects framework or maintaining legacy code.
Step 2: Evaluate candidates
Look for portfolios that demonstrate working apps and complex data synchronization logic. Uma runs instant video interviews and builds shortlists with side-by-side comparisons to speed up your review process.
- Check for examples of custom objects and properties defined via API to handle unique CRM data structures.
- Verify experience with deploying projects using file-based action definitions and the HubSpot command-line interface.
- Review past work involving webhook subscriptions that trigger external business logic based on CRM events.
Step 3: Interview your top choices
Discuss technical approaches to authentication and error handling in live conversations. Schedule and conduct interviews within Upwork Messages to receive an immediate transcript and summary after each session.
- Ask how they manage OAuth token refreshes and secure credential storage in production environments.
- Request a walkthrough of a recent integration where they mapped external data to HubSpot custom objects.
- Discuss their strategy for testing API endpoints and validating webhook payloads before deployment.
Step 4: Agree on scope and begin work
Set clear milestones for app development and deployment phases. Use Upwork Messages and the contract workroom for communication and project management while relying on identity verification, payment protection, hourly tracking, and project funds for security.
- Break the project into phases such as API connection setup, custom action coding, and final app deployment.
- Define acceptance criteria for each deliverable including successful data sync tests and UI extension functionality.
- Agree on a timeline for code reviews and bug fixes before marking the final milestone complete.
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The rates and information provided in this article are based on current data and industry sources available at the time of publication. Freelance rates can vary depending on factors such as experience, location, project scope, and market conditions. Readers are encouraged to conduct their own research to confirm current rates and trends, as this information may change over time.