Parcel Delivery App Development

I'm looking to create a parcel delivery app similar to Zomato, available on both iOS and Android platforms. The app should include:

- Real-time tracking
- In-app chat
- Payment gateway

Ideal skills and experience:
- Proven experience in mobile app development for both iOS and Android
- Expertise in integrating real-time tracking and payment gateways
- Strong UI/UX design skills
- Experience with in-app chat functionalities

Please include examples of similar work done and timelines.