Upgrade Slim Framework & Android App Fixes

I'm seeking a developer to upgrade my PHP Slim 2.5 APIs to the latest Slim Framework. You'll also need to make necessary modifications to my Android app, upgrading it from SDK version 34 to 35.

Key Responsibilities:
- PHP Slim Framework upgrade
- Android app modifications & SDK upgrade
- Bug fixes in the Android app

Additional Details:
- I have a list of bugs that need fixing, but I will need to describe them to you.
- The type of API endpoints in use has not been specified, but experience with RESTful, GraphQL, or SOAP APIs is a plus.

Ideal Skills and Experience:
- Proven experience with PHP Slim Framework
- Strong knowledge of Android app development
- Excellent problem-solving skills for bug fixing
- Prior experience with API development and integration