Conference Organizer App Development

I'm seeking a skilled app developer to create a comprehensive event organizing app specifically for conferences. The app should include:

Key Functionalities:
- Speaker management
- Agenda scheduling
- Room and ride arrangement
- Song lyrics for the event

Integrations:
- Calendar sync
- Payment gateway
- Social media sharing

Ideal Skills and Experience:
- Experience in developing event management applications
- Strong knowledge of API integrations for calendar, payment gateways, and social media
- Proficiency in user interface (UI) and user experience (UX) design
- Ability to deliver within budget and timeline

Please provide samples of previous similar work. Looking forward to your proposals!