API's for our website

I am looking for an expert to create an API for our website using RESTful, with user authentication and JSON as the data format. This API should be secure and user-friendly, and be able to handle large volumes of traffic. The user interface should be simple and intuitive, making it easy for our customers to use. Additionally, the API must be robust, allowing for rapid scalability when needed. This is a crucial part of our website, so we are looking for someone who has experience and expertise in this field. If you think you have the required skills, please get in touch and let us know.

Our system is built on top of Google, Azure and Amazon(AWS).