Add features to an existing product

We have written a product in Python that we are replacing with a new product re-written in React, but before we replace the old product we want to add a few more features to it for customers currently on the platform. We are using the Dash framework so experience with dash would be ideal. We think it will be 2-3 months worth of work for one person, full-time. We need someone to start ASAP. We would like them to be available +/- 2 hours GMT (we are based in the UK).