Location-Based Service Portal App Development

I'm seeking an experienced full-stack mobile app developer to create a location-based service portal app. The app connects users with service providers (plumbers, electricians, mechanics, etc.).

Key Features:
- User Functionality:
- Request nearby professionals based on service type and location.
- Simple and straightforward UX.

- Provider Functionality:
- Receive real-time job notifications.
- Accept/decline jobs.
- Manage job tracking.

- Admin Dashboard:
- Manage providers, users, pricing, and analytics.

- Authentication:
- Email and password.
- Phone number with OTP.

- Payment Integration:
- Cash.
- Wish transfer.

Ideal Skills & Experience:
- Strong background in mobile app development (iOS & Android).
- Experience with location-based services.
- Proficiency in building secure authentication systems.
- Familiarity with payment integration.

Please provide examples of similar work done.