Karel Zikmund
Software Engineering Manager On .NET Team - Networking Team at Microsoft
Brno, Southeast, Czechia
Summary
🤩
Rockstar🎓
Top SchoolKarel Zikmund is a seasoned software engineering manager at Microsoft with over a decade leading .NET teams focused on networking, runtime, performance and reliability since 2005. He blends deep hands-on expertise in .NET runtime and networking APIs with a people-first management style that prioritizes autonomy, transparency, and helping others grow. Known for pragmatic simplicity and common-sense problem solving, he drives impact by reducing bureaucracy, fostering consensus, and nudging innovation—often motivated by a desire for comfort and efficiency. An active contributor and community manager in the high-profile dotnet/runtime repo, he has practical QA/test-automation experience stabilizing complex networking and protocol tests. Based in Brno, Czechia, he balances technical leadership with a commitment to open-source, work-life balance, and creating joyful engineering environments.
11 years of coding experience
21 years of employment as a software developer
High School, High School at Gymnazium JihlavaPhD (without graduation), Computer Science, PhD (without graduation), Computer Science at Charles University in Prague
Stackoverflow
209reputation
12kreached
8answers
0questions
Github Skills (15)
unit-testing10
asp-net10
net10
dotnet10
csharp10
dotnet-core10
test-automation10
quic9
http9
debug8
debugging8
migration6
netcore6
configurations6
github6
Programming languages (12)
Github contributions (5)
dotnet/runtime
Apr 2015 - Sep 2022
.NET is a cross-platform runtime for cloud, mobile, desktop, and IoT apps.
Role in this project:
QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:254 reviews, 151 commits, 85 PRs in 7 years 6 months
Contributions summary:Karel primarily focused on disabling failing tests within the .NET runtime repository. Their contributions involved identifying and disabling tests related to DNS resolution, HTTP/2 and HTTP/3 functionalities, and QUIC implementations. The commits include modifications to test files, adding `ActiveIssue` annotations, and utilizing platform detection to selectively disable tests based on the environment. This work aimed to address test failures and maintain the stability of the test suite.
dotnetruntimelinuxcsharpxamarin
karelz/corefx
Sep 2016 - Jul 2018
Contributions:50 pushes, 12 branches in 1 year 10 months
dotnetfile-systemsconsolexmlnet-core
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.