React.js App

We are looking for an experienced React.js developer to develop a React App over the next 5 weeks, starting Mon 24th Aug and ending Fri 25th Sept - we estimate that you will be 'busy' for approx 3 hours each day, some days more and some days less.
The project is to write an embedded React 'document viewer and editor' and you will be working with our team who will provide you with API's and guidance. If you've had experience with writing specialised document viewing, editing, highlighting apps in the past that would be an advantage.
Your relevant examples, time availability and quoted estimate for the time (75 hours in total) will be deciding factors whether we choose you for this project.
We would also prefer somebody who is not going to mind having to spend extra hours if required to get the job done, especially if this will not affect your quoted price.