I will provide you one sample application which confirms your basic requirements.

About:

I am iOS developer with experience of more than 5 years. I have experience of developing Product and Service based applications. I having a experience in Retail, Restaurant, Petro domains.
I have also knowledge of various Payment gateways and device integrations.
I have experience developing of Chat applications, Video and Audio calling  features applications.

I have a hand on experience on following things in iOS :

- Swift (Update with latest version)
- iOT based device integrations.
- FireBase
- GCD and NSOperation
- Mulitpeer iOS framework.
- Core Bluetooth (Device integrations)
- Core Data, Realm, SQlite
- Socket programming
- MQTT
- Design Patterns.
- Having ability to resolve Multi threading Environment issues.

- Bug solving for existing application

Note: Pricing will depend on the amount of work which will be reasonable.
Thanks..!

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