Android developer needed to do troubleshoot and resolve issues on an open source android app

This work involves resolving some bugs. The application is already built and ready. There are two main tasks which include:
1. Resolve bugs and features
Syncing the application to the database : The android application is unable to sync with the server.
QR : Generate, save and print QR codes from the application
Notification: Registered children should get welcome text messages
2. Documentation for work done

The app is built on an open source platform - openSRP: which can be found at: https://github.com/opensrp/opensrp-client-core.git