Improvements in backend concept

### Epic Description

This epic is a place holder for multiple ideas of improvements in the crypto back-end concept.

Scope is PoC with basic functional tests

### Acceptance Criteria (DoD)

All the improvements in the child tasks are implemented with basic functional tests

Start by reviewing the child tasks associated with this epic, since no specific files or entry points are named here. Identify the backend improvements and their scope, then define the basic functional tests needed to demonstrate that all child-task acceptance criteria are met.

Written by the indexing model from the issue text.