Markus Hartung
Senior Development Consultant at Hartmark IT AB
Uppsala County, Sweden
Summary
👤
Senior🎓
Top SchoolMarkus Hartung is a Senior Development Consultant with 11 years of hands-on experience delivering .NET-based solutions across finance and public sector clients, currently contracting from Uppsala and running his own IT consultancy. A Chalmers-trained software engineer, he combines strong TDD and Agile practice with full-stack capabilities and a track record of migrating legacy systems to .NET. He has guided teams at Scania on TDD adoption and contributed to production-critical features like automated document signing at Handelsbanken. An active open-source contributor, Markus expanded JWT library capabilities by adding "None" algorithm support and fluent custom headers, showing attention to security tooling and developer ergonomics. He is exclusively interested in consultant engagements rather than permanent job offers.
11 years of coding experience
17 years of employment as a software developer
Master's degree, Computer Software Engineering, Master's degree, Computer Software Engineering at Chalmers tekniska högskola
English, Swedish
Stackoverflow
1reputation
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Github Skills (11)
net10
asp-net10
json10
authorizations10
dotnet10
csharp10
authorization10
jwt10
algorithm9
algorithms9
unit-testing8
Programming languages (18)
Github contributions (5)
jwt-dotnet/jwt
Nov 2021 - Jan 2023
Jwt.Net, a JWT (JSON Web Token) implementation for .NET
Role in this project:
Back-end Developer
Back-end DeveloperContributions:38 reviews, 12 commits, 16 PRs in 1 year 2 months
Contributions summary:Markus primarily contributed to the core functionality of the `jwt-dotnet/jwt` repository, a .NET implementation for JSON Web Tokens. Their work included adding support for the "None" algorithm, which involved modifying existing code and updating tests to accommodate this new feature. They also implemented support for specifying custom headers using fluent calls, enhancing the flexibility of token creation. These changes demonstrate a focus on expanding the library's capabilities and improving its usability.
dotnetjsonwebtokenjwtjsonc-sharp
hartmark/jwt
Nov 2021 - Feb 2024
Jwt.Net, a JWT (JSON Web Token) implementation for .NET
Contributions:51 pushes, 29 branches in 2 years 2 months
tokenjson-web-tokenweb-tokenjwtjson
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