Android App, Migrate from Image-Based Pages to PDF Viewer with SQLite Integration

I'm looking for an experienced Android developer to upgrade my existing reading app. The current app uses image files for each page, and I want to switch to a more efficient PDF viewer approach, utilizing a pre-built PDF file.

Key Features:
- Replace image-based rendering with PDF viewer
- Maintain existing functionalities: page navigation, para/surah indexes, bookmarks, screen taps for page turning, basic zoom
- Implement efficient management of bookmarks in the new system

Ideal Skills:
- Proficiency in Android app development
- Experience with PDF viewer libraries (PDF.js, MuPDF, Android PDF Viewer)
- Strong understanding of UI/UX principles for navigation ease

Please write at top of your cover letter "I can do your project and integrate pdf viewer"