Aleksandr Kuryshev contributed to the Ecwid/ecwid-java-api-client repository by developing two key backend features over a two-month period. He implemented a customer-facing data retrieval capability that enables support teams to access a customer’s most recent order by email through a streamlined API call, improving workflow efficiency. In addition, Aleksandr extended the order data model to support electronic invoicing compliance by adding fields for PEC email, SDI code, and commercial relationship schemes, as well as enhancing tax data modeling for accurate reporting. His work focused on Kotlin-based API development and backend engineering, demonstrating depth in data modeling and integration.