Integrate JobAdder CRM API with Base44 Website (OAuth2 Required)

We are building a recruitment website using Base44 (no-code/low-code platform) and need to integrate it bidirectionally with JobAdder CRM via their REST API.Main tasks: Set up OAuth2 Authorisation Code flow authentication (mandatory – JobAdder API requires this; developers must have proven experience).
Pull active job listings from JobAdder (GET /jobs endpoints) and display them dynamically on the website (e.g., searchable job board).

Handle candidate application submissions from website forms: Create candidates (POST /candidates), attach resumes, and link applications (POST /jobapplications).

Use Base44's workspace integrations (prefer OpenAPI spec import if possible) or backend functions for API calls.

Ensure clean, secure implementation with error handling, token refresh, and compliance (e.g., GDPR basics).

JobAdder's API docs are at: https://developers.jobadder.com/docs/ (full instructions provided by their API team). We already have access to guidance.

Please note that we require developers to have experience with OAuth2 authorisation code flow, as this is the authorisation/authentication process the JobAdder API uses.

Thanks,

Nick