Cross-Platform Karaoke App Development

I'm looking for an experienced developer to create a feature-rich karaoke app available on both iOS and Android platforms.

Essential Features:
- Comprehensive song library
- Recording capability
- Social sharing options
- Live broadcasting
- Gift sending

User Interactions:
- Comments on performances
- Private messaging
- Live chat during performances
- Party rooms for singing
- Chat seat modes in party rooms

Ideal Skills and Experience:
- Expertise in mobile app development for both iOS and Android
- Strong background in integrating social features and live broadcasting
- Experience in UI/UX design for engaging user interactions
- Familiarity with music streaming and recording technologies
- Ability to deliver within budget and on schedule

Please provide portfolios and relevant experience.