Complete 80% Finished Web App

I'm looking for a skilled developer to finish my web app, which is currently 80% complete. The project may also involve copying the finished app to a mobile platform.

Key tasks include:
- Implementing user authentication (method to be decided)
- Minor details like:
- UI/UX adjustments
- Bug fixes
- Content updates

Ideal skills and experience:
- Strong background in web app development
- Experience with user authentication integration
- Proficient in UI/UX design and debugging
- Ability to update and manage content

Looking forward to your proposals!