On-Demand Security Patrol App

I'm seeking an experienced mobile app developer to create an on-demand security patrol booking app for a security company, available on both iOS and Android platforms. The app should resemble the Patrol app model and include the following core features:

Client Features
- Phone number verification for login/signup
- Book a patrol: choose location, time, and duration
- Real-time guard tracking using GPS
- Payment integration via credit/debit cards and PayPal
- Push notifications for updates

Admin Features
- Admin dashboard to assign and track jobs
- Bonus features (if possible):
- In-app chat with dispatch
- Guard app interface for check-ins and reporting

The app should have a clean, professional, and user-friendly design. Branding assets will be provided. Ideal candidates will have:
- Proven experience in developing similar mobile applications
- Strong UI/UX design skills
- Expertise in real-time GPS tracking and payment integrations
- Familiarity with admin dashboard functionalities

Please share your portfolio and relevant experience. Looking forward to your bids!