APK Feature Combination

I need two APKs merged together to combine their features. The primary goal is to combine functional modules from both APKs.

Ideal Skills and Experience:
- Strong experience in Android development and APK modification.
- Understanding FTP protocol
- In-depth knowledge of Android's functional modules.
- Ability to ensure that merged APKs maintain stability and performance.
- Familiarity with security protocols to protect data during the merge.
- Experience with user authentication, payment processing, and data synchronization is a plus.

Please provide a portfolio showcasing similar projects.