Facebook Lead Ads CRM Integration -- 2

I need an experienced PHP or Node.js developer to connect Facebook Lead Ads to my CRM through a real-time webhook. The flow is straightforward: as soon as a user submits a lead form on Facebook, their contact details (name, email, phone and any custom fields we map) should be captured via the Facebook Graph API, passed through a secure webhook, and then written into my CRM using its REST API.

You’ll set up, test, and document:
• the Facebook app permissions and subscription so leads fire instantly
• a webhook endpoint that validates Facebook signatures and parses the user-information payload
• the CRM API call that creates or updates the contact, with clear error handling and logging

The work is complete when a test lead appears in the correct CRM list within seconds, retries are in place for transient errors, and I have a short README explaining configuration variables and how to refresh tokens if needed.