create Freshcaller (Freshworks) app - call end fires ajax

I am looking for a developer to create a Freshcaller app with specific functionality and design preferences. The ideal candidate should have experience in freshworks and be able to create a minimalist Freshworks app. If you never done that we you quite probably the WRONG person.
The expected timeline for this project is up to 7 days.
We will not provide any environment or login credentials. Please test it on your own.

Specific requirements for the project include:

- Developing a Freshcaller app
- Designing the app with a minimalist approach
- Ensuring the app fires a ajax call when (only) outgoing calls are finished
- the uri for the ajax call should be defined in the app settings
- the ajax call should include the phone number

IMPORTANT:
You can probably use the OnCallUpdate function with the status = 1. Please take a look at the freshcaller developers docs
https://developers.freshcaller.com/docs/product-events/#oncallupdate

Skills and experience needed for this project:

- Strong understanding of Freshcaller and its API
- Proficiency in web development languages such as JavaScript, HTML, and CSS
- Experience with AJAX and integrating it into web applications