Travel API: research and development

We did the following project 3 months ago using a demo account API
https://www.freelancer.com/projects/php/Travel-API-integration-30170175
The demo was done with CodeIgniter Framework and you can see print screens attached

Now we want to switch from demo account to live account API and also do research and development with new calls/responses.

We will need a company with experience in PHP, WebServices, Mongo, Node.js programming and **travel API integrations** to work on monthly basis.

!!!!!After this project we will provide extra travel projects to do and need also a second developer on a full timer basis!!!!

Please provide a list of sites you have done with travel API integration you have implemented.
Example of answer:
I have implemented that xxxxx API in www.domain.com

We will ignore proposals Providing just the name of the APIs or just the name of sites. We need both sites and APIs related to each site.
Do not provide hotel Word Press Sites
Do not provide travel agency sites without online booking engine
NDA will have to be signed for long term collaboration with proof of data submitted.
Thanks