Technical Writing for designing an App

Hi there - I need a technical writer to create API Documentation as well as highly detailed technical specifications for an app I am designing. The intended target audience is professionals in a specific field, so the technical writing must be suited to them.
The API Documentation should include all of the necessary information to help users integrate the app into their own systems and understand how it works. The technical specifications need to have exact, detailed technical requirements in order to ensure that the app functions correctly for the intended audience.
If you think you have the experience and skills necessary to provide what I need, please contact me. Let's make this project a success!