Android Skill-Based Prediction Contest App

I'm looking for an experienced Android developer to create a simple, clean application for skill-based prediction contests.

Core functionalities:
- User registrations and logins
- Skill-based prediction contests with multiple-choice answers
- Leaderboards and rankings

Contest format will resemble betting questions, but it's a legal skill game, not gambling. Results will be displayed after the event ends.

Ideal skills and experience:
- Proficiency in Android app development
- Experience with user authentication systems
- Familiarity with creating interactive contest formats
- Strong UI/UX design skills for a clean, user-friendly interface

Looking forward to your proposals!