Martin Stühmer

Hello there, I’m Martin, software architect and developer from the Cologne/Bonn area. Right from the start of my professional career, I decided in favor of .NET and Microsoft technologies and tools and have always incorporated them into my work. With more than 15 years of experience in the field of software architecture and development with .NET, my focus is particularly on increasing the quality and performance of development teams, the interaction of the software solution with the target environment and the actual application down to the last byte.

In my position as Director Consulting Services @ CGI, I act as enterprise architect and developer for cloud native and .NET solutions. I am also a trainer for cloud and software architecture. In addition to my professional life, I am involved in the open source communities and currently provide them with various NuGet packages with different focuses and functionalities.

A strong willingness to learn and develop is also part of my everyday life. This was taken to a new level for me in 2021 after I successfully completed my IHK trainer and my Microsoft certified trainer this year. In addition, I was able to qualify as a trainer for CGI’s Risk and Cost Driven Architecture program in 2022.

Published blogs

Clean Code: A Lip Service, Not a Standard

Clean Code is often praised but rarely practiced effectively. This article explores how misunderstood ideals and over-engineering harm .NET systems, how to recognize such failures early, and which C# best practices and official guidelines truly support maintainable software.

ConstantExpectedAttribute: Unlocking Performance Through Compiler Awareness

The ConstantExpectedAttribute, introduced in .NET 7, provides a powerful mechanism to signal compiler expectations about constant values. This enables better performance optimizations, enhanced IDE tooling, and clearer API contracts. Learn how to leverage this attribute to build more efficient and maintainable .NET applications.

Retiring Legacy .NET Projects — Balancing Risk, Cost, and Forward Value

In every mature .NET landscape, legacy projects represent both heritage and hazard. They once powered entire business models — now they silently consume time, budget, and attention. The decision to retire or modernize them isn’t about technology fashion. It’s about sustaining the organization’s capacity for value creation.

TUnit — A Pragmatic Evaluation for .NET Teams

TUnit brings compile-time test discovery and native AOT support to .NET testing — but is it ready for enterprise adoption? A pragmatic analysis of performance gains, tooling maturity, and migration timing for teams evaluating alternatives to MSTest, xUnit, and NUnit.

Still Waiting for the Final Piece: When C# 14 Comes Close, But Not Quite There

C# 14 introduces the new ‘Extension Everything’ syntax—an elegant step toward more expressive code, yet one that still can’t quite match VB.NET’s classic ByRef magic. A humorous reflection on what’s almost, but not fully, possible in .NET 10.