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One middleware turns ConferenceNotFoundException into the wire code conference_not_found via Humanizer - a naming convention promoted to API contract, with a 400-versus-404 tension and Error-level logs it never resolved.
Convey's IRejectedEvent gives Pacco an application-level negative acknowledgement - a rejected twin for every command. Reading the four exception-to-message mappers shows the pattern decaying in four different ways, from a failed reserve announced as a failed release to rejection classes nothing ever constructs.
DShop.Common's error middleware maps every exception to HTTP 400, computes a safe message, then throws it away and serialises the raw exception text to the caller.
A reusable try-catch-finally wrapper in DShop.Common awaits a null-conditional delegate - so the success path throws a NullReferenceException the failure path avoids.
DShop.Common decides a message's fate from the type of exception a handler throws - domain failures become events, infrastructure failures get retried.
A 22-character job name, a 20-character column, and an error handler that has thrown on every attempt since the day it shipped - plus the four parallel logging systems that still could not catch it.
Pick the one closest to the role. Each is two pages and carries the same facts.
Applied AI
Agentic AI & Cloud Engineer · multi-agent systems, RAG and MCP on AWS
Cloud & .NET
C#, .NET 10 and ASP.NET Core microservices on AWS and Azure · Terraform & AWS CDK
Data Engineering
AWS lakehouse · Kinesis, Glue (PySpark), Apache Iceberg, Lake Formation
Everything
All three domains, with the standout project from each