Delivery Utility App Development

I'm looking for an experienced mobile app developer to create a utility app focused on delivery services.

Key Features:
- Real-time tracking of deliveries
- Push notifications for updates
- In-app payments for transactions

Ideal Skills and Experience:
- Proficiency in mobile app development
- Experience with real-time tracking technology
- Strong background in implementing push notifications
- Familiarity with secure in-app payment systems

Please provide examples of similar work done and any relevant qualifications.