IT Services Mobile App Development

I'm looking for an experienced mobile app developer to create an Android and iOS application for our IT services company. The app should allow customers to:

- Create user accounts using their phone number and a password
- Track their service tickets and see the progress of the job
- Receive push notifications for updates
- Call directly from the app
- Raise new service tickets
- Access chat support for real-time assistance

Ideal Skills and Experience:
- Proven experience in developing Android and iOS applications
- Strong background in creating user authentication systems
- Experience with push notification integration
- Familiarity with in-app calling and chat support features
- Ability to design intuitive and user-friendly interfaces

Please provide examples of similar work done. Looking forward to your proposals!