I have 5+ years of experience in mobile app development, have developed 15 applications from scratch and around 10 applications I have contributed on muliplte features like Dynamic Home Page , Product detail page, product listing page , payment integrations, in app purchases , adding ads sdk.
As your requirement is to fix the notification bug that would be ideally good for me becuase I do have experice of integrating multiple notifications sdks like clever tap, one signal , web engage etc
I have also developed the backend for notifications in my last company and integrated in Android/iOS as well using Firebase push notifications.
As I am new to freelancer right now so I don't have my quality analysis on it right now.
I hope you will give me the chance to work on your problem as I do have 5 years of Industry experience in multiple mobile technologies.