Bug Fixes & Library Updates in CodeIgniter and Java Android APK

I'm looking for an experienced developer to help me with my CodeIgniter and Java based Android APK project.

Key Tasks:
- Identify and fix bugs: The project has some issues that need to be diagnosed and rectified. This could involve troubleshooting and debugging the code.
- Update Gateway Integrations: Some of the gateways in the project need to be updated. This includes ensuring that the integrations with various gateways (like payment, authentication, and API gateways) are functioning correctly.
- Replace Deprecated Libraries: The project is currently using some deprecated libraries. This could involve updating the code to use current libraries and ensuring that the project still functions correctly after the updates.

Ideal Skills:
- Proficiency in CodeIgniter and Java
- Experience with Android APK development
- Strong debugging and troubleshooting skills
- Familiarity with current libraries and deprecated libraries in CodeIgniter and Java

Please note, I am not able to specify the exact bugs, gateways, or libraries that need attention. Therefore, I need a developer who can autonomously diagnose and fix these issues.