Hey I'm a Senior Android Developer, your Job description hocked my Attention really fast, the idea of an amazing App is really great. Fixing Bugs without destroying the fundamentals of the app is an important task.
So if you are interested in working with an expert, avoid problems and receive a great service then jump lets jump on free initial call(10min) and talk about the details, so I will be able to help you, in very effective way.
So make sure you can give me precise details, because I only work with professionals who are really interested in developing a market leading product.
Best Regards,
Semen Vyshnyevetsky