Fantasy Sports App Development

I need an Android app identical to Dream11, with only the design, name, and color scheme altered. The app should include:

- All features, functions, and APIs as Dream11
- Payment integration via Razorpay
- User authentication via both email/password and social media login

Ideal skills and experience:
- Proven experience in developing similar fantasy sports apps
- Strong knowledge of Razorpay integration
- Expertise in secure and smooth user authentication systems
- Proficient in Android app development with a focus on UI/UX design

Please provide portfolio and similar work references.