Cross-Platform Mobile App Creation

I'm requiring a proficient coder to develop a cross-platform mobile app compatible with both Android and iOS.

Key Responsibilities:
- Developing the mobile app
- Integration with my existing database

Crucial Features:
- User registration and authentication capability
- Ensuring functionality for in-app purchases

Ideal Skills:
- Mobile app development experience
- Experience in creating cross-platform applications
- Knowledge in user registration, authentication, and in-app purchases procedures.

Looking forward to working with someone who is not only skilled but dedicated, and open to collaborative work.