Kristijan Šimić
Principal Software Engineer - Microsoft Defender Advanced Threat Protection Team
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolKristijan Šimić is a Principal Software Engineer based in Berlin with 14 years of experience building cross-platform developer tools and security products at Microsoft and earlier startups. He currently leads engineering for Microsoft Defender on macOS, blending deep systems and security knowledge with pragmatism around user-facing product quality. Previously he sped up large-scale macOS builds by porting a .NET build engine to .NET Core and enabling distributed cloud builds, and he has led native macOS/iOS product teams at Wunderlist. Comfortable across C, C++, C#, TypeScript and Objective‑C, he pairs backend and DevOps expertise—evidenced by notable contributions to Microsoft’s BuildXL (macOS build improvements, notarization, and .NET Core migration). Known for untangling platform-specific build and signal-handling issues, he brings a track record of shipping reliable, scalable systems that span consumer apps and security infrastructure.
14 years of coding experience
13 years of employment as a software developer
Master's degree Computer Science, Master's degree Computer Science at Ludwig-Maximilians-Universität München
English, German, Croatian, French
Github Skills (12)
sh10
macos10
script10
shell10
scripting10
build-automation10
csharp9
dotnet-core9
netcore9
nuget8
cicd8
xunit8
Programming languages (5)
Github contributions (5)
microsoft/BuildXL
Mar 2019 - Dec 2021
Microsoft Build Accelerator
Role in this project:
Backend Developer & DevOps Engineer
Backend Developer & DevOps EngineerContributions:97 commits, 132 PRs, 66 pushes in 2 years 9 months
Contributions summary:Kristijan's contributions focused on enhancing the build process for macOS. They made updates to documentation and build scripts, fixed a missing dependency, and implemented support for notarizing and stapling kernel extensions. Moreover, the user refactored the Nuget analyzer and spec generator and transitioned the project to use .NET Core 3.0. In addition, they addressed the process timeout issue, and made signal handling resilient to asynchronous calls.
kernelunixcompilermicrosoftexecutable
Kr1sso/BuildXL
Jul 2019 - Nov 2019
Microsoft Build Accelerator
Contributions:77 pushes, 64 branches in 4 months
cppwindowsmicrosoftacceleratorcplusplus
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