Calendly API & Webhook Integration

We need a developer to integrate Calendly API and webhook functionality into an existing SaaS application. The work includes setting up the API connection, handling webhook events, and ensuring the integration works reliably in production. You will also help deploy the updated application on AWS using Node.js, MongoDB, and Nginx. Experience with SaaS workflows and secure API integrations is important. This is a short-term project for someone who can deliver a stable, well-documented solution quickly.