Marketplace to accounting sync with e-invoices

A multi-marketplace e-commerce operation was entering inventory, orders, invoices and shipping documents by hand. I built an integration service that synchronises Trendyol, Hepsiburada, N11 and GittiGidiyor with Netsis Accounting in real time: inventory, journal records, orders, e-invoices and e-waybills. It supports multiple databases, uses Hangfire background jobs for peak periods, global error handling and token-based authentication. Manual data entry across all channels was eliminated.

Result: accounting records stay current in real time, background processing absorbs peak order periods, and e-invoices and e-waybills are generated automatically.

Stack: C#, .NET, Hangfire background jobs, REST APIs, SQL Server (multi-database), token-based authentication, global error handling.

Case study: https://ruicodex.com/CaseStudies/Detail/ecommerce-netsis-accounting-integration