Siegfried Pammer
Senior Software Engineer at Qt Quality Assurance
Steyr, Upper Austria
Summary
🤩
Rockstar🎓
Top SchoolSiegfried Pammer is a Senior Software Engineer with 18 years' experience specializing in .NET tooling, compilers and developer tooling, currently working in QA at Qt. He leads C# compiler efforts at Axivion and is a longtime contributor and developer of ILSpy and other icsharpcode projects, bringing deep expertise in decompilation, IL analysis and modern C# language features. His open-source work spans both back-end compiler/refactoring engines and front-end editor UI (AvalonEdit/AvaloniaEdit), showing a rare full-stack fluency across language tooling and editor rendering. Siegfried combines rigorous test-automation and performance-minded refactors with feature work such as VB.NET refactorings, syntax highlighting improvements, and editor rendering fixes. Based in Steyr, Austria, he pairs academic grounding from TU Wien with practical impact on widely used .NET OSS like ILSpy and SharpDevelop—often improving obscure corner cases of language semantics and tooling.
18 years of coding experience
Vienna University of Technology
Stackoverflow
311reputation
4kreached
2answers
3questions
Github Skills (46)
unit-testing10
parserator10
parser10
text-editor10
xaml10
abstract-syntax-tree10
testing10
net10
dotnet10
decompilation10
vba10
mvvm10
zip10
refactor10
desktop10
Programming languages (6)
Github contributions (5)
icsharpcode/ILSpy
Feb 2011 - Dec 2022
.NET Decompiler with support for PDB generation, ReadyToRun, Metadata (&more) - cross-platform!
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 release, 128 reviews, 3424 commits in 12 years
Contributions summary:Siegfried primarily contributed to the core functionality of the .NET Decompiler, focusing on code-level improvements. Their work included refactoring and implementing features related to handling and decompiling code, such as enhancements for deconstruction, handling of various patterns, the analysis of code, and the generation of code mappings. They also improved the analysis of the IL, inlining variable declaration, handling issues with code such as stackallocs and null-checks, and adding support for new C# language features like parameters and the use of "with" expressions.
dotnetilspydecompilepdbmono
icsharpcode/AvalonEdit
Apr 2009 - May 2022
The WPF-based text editor component used in SharpDevelop
Role in this project:Back-end Developer
Back-end DeveloperContributions:7 reviews, 188 commits, 17 PRs in 13 years 3 months
Contributions summary:Siegfried contributed to the AvalonEdit text editor component used in SharpDevelop, adding functionalities to its core features. They implemented and improved syntax highlighting for various code constructs, fixed bugs, and integrated XML parsing and testing, enhancing the editor's capabilities. The user also focused on improving the code's performance by removing debug code in the Release build. Moreover, the developer reimplemented CC using the incremental parser.
c-sharpcsharpwpftext-basedavalonedit
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