Sleek Android Learning App

I'm looking for an experienced Android developer to create a modern and sleek learning application. The app should include:

- Video tutorials
- Quizzes and assessments
- Progress tracking

User authentication should be via OTP. An ideal candidate would have:

- Strong experience in Android app development
- Familiarity with integrating OTP login
- UI/UX design skills for a modern, sleek aesthetic
- Experience in implementing video content and interactive quizzes

Please provide examples of similar work done.