Petr Onderka
OSVČ
Prague Metropolitan Area Czechia
Summary
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RockstarPetr Onderka is a seasoned software engineer with 16 years of experience based in the Prague metropolitan area, operating as an independent consultant (OSVČ). He contributes across the .NET ecosystem—improving ASP.NET Core and .NET docs, refining runtime behavior, and enhancing Mono’s dataflow components—demonstrating deep expertise in backend concurrency, JSON handling, and framework-level debugging. His work spans practical sample code improvements, technical writing to clarify and modernize documentation, and full‑stack contributions to tools like NuGet Package Explorer. Noteworthy is his track record of fixing subtle bugs (deadlocks, infinite recursion, polymorphic caching) and strengthening test coverage, showing an attention to correctness that benefits large open-source projects. Comfortable both shipping code and communicating complex concepts, he brings a blend of engineering rigor and documentation craftsmanship that helps teams and users adopt .NET technologies effectively.
16 years of coding experience
Stackoverflow
240,605reputation
18.5mreached
3,038answers
74questions
dynamic
top-1%
console-application
top-1%
dictionary
top-5%
ftp
top-5%
regex
top-5%
oop
top-5%
Github Skills (124)
dataflow10
multithreading10
linq10
testing10
windows10
operator-overloading10
asp-net-core10
asp-net10
vbnet10
visual-studio10
expression-trees10
async-await10
netcore10
wpf10
threaded10
Programming languages (18)
Github contributions (5)
dotnet/docs
Mar 2016 - Jan 2023
This repository contains .NET Documentation.
Role in this project:
Technical Writer
Technical WriterContributions:10 reviews, 130 commits, 151 PRs in 6 years 10 months
Contributions summary:Petr primarily contributed to the .NET documentation repository by fixing operator titles and links across C# and Visual Basic documentation. They made changes to code snippets, likely to ensure accuracy and consistency. Furthermore, the user modernized SHA-256 samples across C# and Visual Basic, updating existing documentation to align with current standards.
dotnetfsharpvisual-basiccsharpdotnet-core
mono/mono
Jun 2012 - Apr 2018
Mono open source ECMA CLI, C# and .NET implementation.
Role in this project:Back-end Developer
Back-end DeveloperContributions:82 commits, 1 comment in 5 years 10 months
Contributions summary:Petr primarily contributed to the `System.Threading.Tasks.Dataflow` component of the Mono project, focusing on dataflow blocks. Their work involved fixing bugs, such as infinite recursion issues, and refactoring existing code related to join targets. Furthermore, the user implemented and improved batch and join blocks, addressing issues like deadlocks and adding functionality for maximum group limits. The commits demonstrate a deep understanding of concurrent programming and dataflow principles.
dotnetjitruntimemonoandroid
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