Online store for Android and iOS

Hello,

We are looking for a subcontractor of an online store for smartphones. The main features of the store

• Store for B2C and B2B.

• The store offers air filters and we need a search engine by characteristics `height`, `width`, `filtration_class`, etc.

• Ability to click “buy again”.

• Notifications about promotions in the store.

• Tracking of order status.

• Ability to contact store support.

Please let me know which backend is preferable for such an application? Currently we have a store on presta which, in turn, is connected to a proprietary ERP system. And here the question is, is it possible to connect the application under presta? (Alternatively, we can prepare some module to extend the poor API of presta).

Please give me an initial price range along with a description of what technology the application would be prepared in (Flutter / dart / native / etc)