Published March 9, 2026

How to Build a Job Board Integrating Greenhouse, Lever, and 73+ ATS Platforms with an ATS API

March 10, 2026

Many SaaS products build job board features so their customers can display open roles directly from their applicant tracking systems (ATS). Recruiting marketplaces, talent platforms, and hiring analytics tools often need to aggregate jobs from systems like Greenhouse or Lever and render them in their own product experience.

The challenge is that every ATS exposes different APIs, schemas, and authentication models. Pulling job listings from Greenhouse, Workday, iCIMS, SmartRecruiters, or other systems typically requires building and maintaining separate integrations.

Unified simplifies this process by providing a normalized ATS API that supports dozens of hiring platforms. Instead of building per-provider connectors, developers can retrieve job postings from many ATS systems through a consistent endpoint and schema. This allows SaaS products to build job boards that automatically display customer job listings and stay synchronized with their ATS.

Why SaaS Products Build Job Board Integrations

Many B2B SaaS products build job board functionality for their customers.

Examples include:

Recruiting marketplaces
Talent sourcing platforms
Hiring analytics tools
Employer branding platforms
Candidate matching platforms

These products allow customers to connect their ATS so the platform can retrieve job openings and display them to candidates.

Typical features include:

Aggregated job listings across companies
Custom career pages embedded in SaaS products
Talent marketplaces displaying open roles
Hiring dashboards that track job availability

By integrating with customer ATS systems, SaaS platforms can automatically keep job listings updated without manual uploads.

Unified ATS Category

Unified's ATS API normalizes job data across 73+ ATS integrations, including platforms such as:

Greenhouse
Lever
Workday
iCIMS
SmartRecruiters
Ashby
Jobvite
BambooHR
Workable
Zoho Recruit

These integrations allow SaaS products to support many hiring platforms with a single implementation.

The primary object used for job boards is the job object, which represents a job posting or requisition in an ATS.

Unified Job Object and Key Fields

Unified standardizes job records across ATS providers.

Important job fields include:

Field	Description	Job Board Usage
id	Unique identifier for the job	Used internally to track listings
name	Job title	Displayed as the primary listing title
description	Full job description	Rendered on the job details page
status	Job state (open, closed, etc.)	Filter to show only active roles
public_job_urls	Public apply URLs	Used for 'Apply' buttons
addresses	Job location information	Display city or region
employment_type	Employment classification	Show full-time, part-time, contract
departments	Department or team	Enable filtering by department
remote	Indicates if job is remote	Power remote-only filters
number_of_openings	Number of available positions	Show number of roles available
created_at	Job creation timestamp	Sort listings by newest jobs
updated_at	Last update timestamp	Detect updates for incremental sync

Additional fields may be available depending on the provider, including:

compensation ranges
recruiter or hiring manager IDs
screening questions
metadata fields
language locale information

These normalized fields allow SaaS platforms to display job listings consistently across many ATS systems.

Connecting Customer ATS Platforms

Customers authorize their ATS integrations using Unified Connect.

Typical process:

Your application launches the Unified Connect authorization component.
The user selects their ATS platform, such as Greenhouse or Lever.
The user authorizes the integration.
Unified redirects back to your application with a connection_id.

Your application stores the mapping:

user_id → connection_id

All subsequent API calls reference this connection identifier to retrieve jobs from the customer's ATS.

Retrieving Job Listings

Job listings are retrieved using the ATS job endpoint.

GET /ats/{connection_id}/job

This endpoint returns a normalized list of AtsJob objects across supported providers.

Several filters help retrieve and synchronize job data.

Common filters include:

limit – number of jobs returned
offset – pagination offset
updated_gte – return jobs updated after a given timestamp
query – search jobs by keyword or title
user_id – filter jobs owned by a recruiter or hiring manager
order and sorting options – control ordering of results

Using these filters allows job boards to implement pagination, keyword search, and incremental updates.

Rendering Job Listings

Once jobs are retrieved, your application can render them in a job board interface.

Typical rendering logic includes:

Display the job name as the listing title
Show the employment_type and department as tags or filters
Display addresses or remote status for location filtering
Render the description on the job detail page
Provide an Apply button using public_job_urls

Example job listing elements:

Job title
Location
Department
Employment type
Compensation (if available)
Apply link

This allows your SaaS product to provide a complete job board experience using ATS data.

Keeping Job Listings Updated

To keep job listings synchronized with the underlying ATS, applications can use both incremental queries and webhooks.

Unified supports webhook events for job records, including:

job.created – fired when a new job is created
job.updated – fired when job fields change
job.deleted – fired when a job is removed

Some ATS platforms also provide job closure events. In unified APIs, job closures typically appear as job.updated events where the status field changes to 'closed' or 'filled'.

Job boards typically handle updates by:

creating listings on job.created
updating listings on job.updated
removing listings on job.deleted
hiding listings when status changes to closed

Combined with the updated_gte filter, this ensures listings remain synchronized with the ATS.

Supported ATS Platforms

Unified supports 73+ ATS integrations, allowing SaaS products to connect to a wide range of hiring platforms.

Examples include:

Greenhouse
Lever
Ashby
SmartRecruiters
iCIMS
Workday
Jobvite
BambooHR
Workable
Zoho Recruit

Because Unified normalizes job data across providers, SaaS platforms can support many ATS environments with a single integration.

Why Product Teams Choose Unified

Building job board integrations directly with multiple ATS platforms requires maintaining separate connectors and adapting to different APIs.

Unified simplifies this by providing:

normalized job objects across 73+ ATS integrations
consistent API endpoints for retrieving job listings
unified authorization through Unified Connect
webhook events to keep listings synchronized

Instead of maintaining dozens of ATS integrations, product teams can focus on building recruiting features such as job boards, candidate marketplaces, and hiring analytics.

Start building job boards that integrate with Greenhouse, Lever, and dozens of other ATS platforms today.

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