UK Based Expert Android & iOS Developer

I'm searching for a highly skilled and experienced Android & iOS app developer based in the UK. The specific type of application and its current stage will be defined later, but the ideal candidate should have a rich portfolio and extensive experience in developing various types of applications including social networking, e-commerce and utility apps.

Key Requirements:
- Exceptional skills in Android & iOS app development
- UK based
- Rich portfolio of various applications
- Excellent communication skills
- Time management skills
- Ability to work independently and in a team.

Experience with the following functionalities is preferred:
- User authentication
- Payment processing
- Push notifications

Please note that project details will be shared with shortlisted candidates.