Website and Android app

I am looking for a skilled developer to create a website and Android app for my financial services business. The project will involve the following:

- User registration and login feature
- Payment gateway integration
- Modern and minimalistic design style

Skills and experience required for this job include:

- Proficiency in website and app development
- Experience with user registration and login systems
- Knowledge of payment gateway integration
- Ability to create a modern and minimalistic design

Please provide examples of previous work that showcases your skills in these areas.