Currently, ATG, Salesforce, and a Node.js-built BFF (Back-end for Front-end) are used. The most crucial aspect of the SDK is data handling, as each Back-end sends information in a different format. In this regard, the SDK leverages TypeScript's typing to understand the data format expected by components, converting the API-obtained data into the model expected by the components. This approach allows the use of a single Front-end with various different Back-ends.