new ux ui for our application

We need a skilled UI/UX designer to help us improve the user experience and update the design of our mobile app. The main focus of the project is to make the app more user-friendly by implementing new features.

Mobile App Updates:

Display ending offers: A "Last Chance" category or pop-up notification should be added to the app to display offers that are about to end soon.
Add item search: A search function should be added to the app to allow customers to search for specific products or categories.
Push notifications for ending offers: Customers who opted to receive notifications should receive a message when an offer is about to end, prompting them to take action and make a purchase.
Registration:

Implement new login design: The registration process should be updated with a more user-friendly login design.
Show password and new password requirements: Customers should see the password requirements before they set their password.
Request "Gewerbeanmeldung" during registration: Customers should provide proof of their business registration during registration or at least 1 month later.
My Account New Features:

Allow customers to request a change of address via pre-written email: Customers should send an email with pre-populated information to request a change of address.
Require customers to update their phone numbers: Customers should provide and update their phone numbers to enhance account security.
Implement WhatsApp support: The app should allow customers to login or register using their WhatsApp account, as well as provide support via WhatsApp messaging.
Advanced Plugin Updates:

Utilize A, B, and C items and their fields: The app should use the A, B, and C items and their fields developed as part of the plugin.
Allow C items to be available only if A or B items were selected: Customers should be notified that the C items are locked until they select an A or B item.
Display the next discount step in the fields: The app should display the next available discount step for each item in its field and use it for upsells.
Add a "Best Price Feature" button: Customers should optimize their purchase by selecting a larger quantity of an item at a reduced unit price using this button.
Include upsell notifications in the checkout process: The app should display upsell notifications to customers during the checkout process.
Additional Requirements:

Input fields should have text notifications to guide customers on what information is required.
Please ask for the application link on stores.