Multi-Vendor Food Delivery App Development

I'm looking for a skilled software developer to build a native application for both iOS and Android platforms. The primary objective of this app is to provide a platform for multiple food and grocery vendors to offer their products.

The app must integrate all necessary features for a successful operation of multi-vendor businesses; nevertheless, as I do not specifically zoom into any distinct capabilities at this moment, I am open to suggestions based on your experience and expertise.

Key requirements:

- Designing a user-friendly interface for vendors and consumers
- Facilitating seamless transactions between consumers and vendors
- Ensuring robust data and privacy management
- Optimizing app performance across different devices and operating systems

Ideal candidate will hold expertise in:
- iOS and Android development
- UI/UX designing
- Database management
- Secure payment gateway integration
- E-commerce app development, specifically multi-vendor platforms

Please note, your offer should accommodate any future features or improvements that might be necessary based on user feedback and app performance.