What are the specific engines for an online store?

Question

CMS

I am looking for a specific engine for an online store. More specifically, you don't need a "muzzle" at all, but only backend logic, namely:
-Management of clients (at least distribution into groups).
-Ready-made online payment modules.
- Sending goods to email immediately after payment.
-External order forms with the possibility of chain adding goods (after placing an order, you can add something else (possibly via API)).
What are the options? Common engines are not particularly suitable because they have a lot of extra for the site of the store itself, in general, you need a little binding over the aggregator of payment systems.

Answer 1

Paid true, but what you need is e-autopay.com