Your app takes payments, but order status still depends on someone checking the Stripe or PayPal dashboard, or your webhook endpoint misses and duplicates events.

What you get (one payment provider, one ASP.NET Core application):

A webhook endpoint with signature verification (Stripe signing secret or PayPal webhook verification)

Idempotent processing: each event is stored and handled once, so retries never double-book an order

Mapping of the key events (payment succeeded or failed, refund, dispute or subscription change, up to 6 event types) to your own order or subscription records in SQL Server or PostgreSQL

Retry-safe background handling (Hangfire or a hosted service) and structured logging

Tests with the provider's test events, plus a short README: setup, secrets, how to replay an event

Delivery: within 48 hours after you give repository and test-account access and confirm the event list. It is delivered into your own app and repository and stays there as source code you can use and modify; Rui Codex's reusable components are licensed for your use.

Not included: checkout or payment-page UI, a second provider, live-mode go-live on your servers (I can guide it in writing), apps not on .NET 6 or later.

How it works: after purchase you receive an e-mail with a short written intake (stack, provider, events, access). Everything runs async, in writing.

About: Rui Codex, Belgium (KBO BE 1033.974.468). C#/.NET and SQL Server since 2017. Delivered work: https://ruicodex.com/CaseStudies