app development

I'm looking for a skilled app developer to create a mobile app for both iOS and Android platforms. I have specific design elements in mind for the app, and the app should include a user login and profiles, e-commerce functionality, and an AI task assistant feature. The app must be user-friendly, have an intuitive design, and be responsive on all platforms. I expect a high level of professionalism, and the project should be completed within the agreed timeline. Any experience in developing similar apps is highly appreciated.