Long-term Ionic Developer Required

We are searching for an experienced Ionic App Developer for cab service project (similar to Uber). The app is already built and the developer is required to fix certain areas of the app, bugs and edit the flow. It would be highly recommended for the developer to have made a similar app in the past.
We expect it to take approximately 2 weeks but it is potentially long term. The budget mentioned is for 2 weeks of work.