Integrate CodeIgniter web app with Wordpress Website

General information for the website: search and find website
Kind of development: Customization of existing website
Description of requirements/features: Hi there,

I am looking for someone who can help me with the following:

I have two websites that need to be integrated. On one website (made with CodeIgniter) the login, search, result and detail page are available and on the other website (made in Wordpress) pages like “about us” etc are available. However, this is not my cup of tea and the developer who made the CI framework left.

On Google there are explanations found how to do this. There is also a pWP plugin but this has not been updated for the last 2 years so I do not wanna reply on this.
Explanation example:
https://www.cometchat.com/blog/how-to-integrate-codeigniter-with-wordpress/

Therefore, I am looking for the best person that can help me with the job. Can you please tell me if you have any previous experience (examples would be nice), what the fixed price would be and when you could do the job?

I hope to hear from you!
Extra notes: