UpKeepDay - mobile application for education

I joined this project in the middle of its development. One of the first tasks was to refactor the previously written code for future capabilities without painful scaling of the application's functionality.
Then I faced various types of tasks, such as integrating the Facebook SDK, Firebase Cloud Messaging, the Stripe payment system, and others. Implementation of a visit calendar, audio feedback recording, recommendations, comments, and much more.
The project development lasted over 7 months.
After that, the application was successfully published on the App Store and Google Play.