bugfix for android app

I am looking for a freelancer to help me with bugfixing my Android app. I have the source code for it, and I can also provide screenshots of the issues. The specific issue is that the app was made for an older version of Android, and needs to be updated in order to run smoothly. I am looking for someone with experience in debugging and updating Android apps, as this is a critical task to make sure that the users have the best possible experience with the app.