REST API developer who also is skilled with OAuth

This is an ongoing part-time work to help integrate REST API in the ongoing development of a marketplace.

We're looking for a web developer with experience with complex REST API integrations and implementing OAuth.

You would ensure continuous maintenance of all integrations you develop.

You need to be fluent in English, written, and verbal. Not only that but you should be able to communicate complex issues to non-tech savvy people.

Please answer these items in as few words, yet detailed as you can.

1. Please demonstrate your experience with working with REST API integrations.

2. What experience do you have with OAuth?

3. What are other relevant skills you have that weren't asked in this post?

4. Please provide a cover letter and CV.

Thank you!