Stef Heyenrath
Microsoft Specialist at mStack BV
Sittard, Limburg, Netherlands
Summary
🤩
Rockstar🎓
Top SchoolStef Heyenrath is a seasoned Microsoft specialist and software engineer with 16+ years of experience delivering enterprise applications across telecom, logistics, healthcare, education, HR, and finance. He blends deep C#, .NET, SQL Server and SharePoint expertise with cloud and security credentials (extensive Azure, AKS/CKAD, AWS and Microsoft security certifications). At mStack he focuses on modern Microsoft ecosystems while his long tenure at CGI combined hands-on development, tech lead and scrum master responsibilities. An active open-source contributor, Stef has improved core .NET tooling and libraries—contributing to notable projects like WireMock.Net, LINQKit and Blazorise—bringing practical test automation and component enhancements to widely used repos. Known for bridging architecture (TOGAF) and implementation, he uniquely pairs enterprise architecture thinking with pragmatic coding and automated testing.
16 years of coding experience
18 years of employment as a software developer
Technische Computer Kunde, Computer Science, HBO, Technische Computer Kunde, Computer Science, HBO at Hogeschool Zuyd (Maastricht, Heerlen, Sittard)
Dutch, English
Stackoverflow
9,585reputation
2.1mreached
260answers
111questions
kendo-ui
top-5%
dynamic
top-5%
Github Skills (42)
unit-testing10
apidoc10
linq10
expressions10
charts10
net10
css10
dotnet10
netframework10
blazor10
asp-net10
component-library10
api10
expression10
parsing10
Programming languages (28)
Github contributions (5)
scottksmith95/LINQKit
Jun 2016 - Nov 2022
LINQKit is a free set of extensions for LINQ to SQL and Entity Framework power users.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:26 reviews, 179 commits, 79 PRs in 6 years 5 months
Contributions summary:Stef's commits primarily focused on updating the project to use .NET RC2. This involved changes to the `Extensions.cs` and `ExpressionExpander.cs` files, which are part of the core LinqKit library. These changes appear to be related to supporting new .NET versions and potentially updating the library's use of .NET Framework features, specifically with regards to compile and invoke functionalities.
dotnetentitysqlefcorec-sharp
WireMock-Net/WireMock.Net
Jan 2017 - Jan 2023
WireMock.Net is a flexible product for stubbing and mocking web HTTP responses using advanced request matching and response templating. Based on the functionality from http://WireMock.org, but extended with more functionality.
Role in this project:Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:2 releases, 168 reviews, 855 commits in 6 years 1 month
Contributions summary:Stef contributed to the core functionalities of the WireMock.Net project, demonstrating a focus on adding features related to scenario and state management. They implemented and tested features for the admin interface, which involved adding support for GET and DELETE operations. Their commits show a solid understanding of the project's testing framework, as evidenced by their testing of stateful behavior examples and updates to the client interface for scenarios.
mockingmocktddwiremocktemplating
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.