API Swagger Definitions

Hi, I'm looking for someone expert with API development, specially swagger definitions and solid understanding of different api authentication types such Basic, Oauth2... I looking for someone to do the swagger definitions for different well known apps such gmail, google drive, sales force.... The work will be driven by Jira. The required endpoints are specific. so for each app, the developer will have a task assigned and budget agreed together., I can indicate exactly what I'm looking for case by case. The work will be as follow (example gmail) 1- I agree with the develop on the endpoints needed from gmail. (so if gmail has 100, we may need only 20) 2- developer will define the swagger based on the required endpoints. It's ok if there is something ready from github or any source, but the developer should verify that it's working as expected and tune it accordingly. 3- the developer will upload the verified swagger to a system (we already have it) 4- the developer will define connectivity to the endpoints (using our system - configuration, no code) 5- the developer will do some test inside our system to ensure that the endpoints based on the defined swagger are working properly. Each swagger app can be vary from simple to complex. so the price could vary between 10$ to 70$ per app depending efforts. In total I'm looking to define approx 200 applications at first stage with a budged between (2000$-5000$) depends on the size of swagger per app.