Piotr Karczmarz
Founder & CTO at Sigmaloc
Poland
Summary
🤩
Rockstar🎓
Top SchoolPiotr Karczmarz is a founder and CTO with 8+ years of focused experience building developer tooling and complex desktop applications, best known for creating the widely used ContextKeeper extension for Visual Studio. He architects and ships end-to-end solutions—ranging from WPF/XAML desktop UIs and .NET backends to WebView2 and CI-driven automation—having led projects like Sourcegraph’s Cody for Visual Studio and CNN’s live MagicWall National Map. Piotr combines product-minded entrepreneurship with deep hands-on engineering, having driven revenue-impacting features (e.g., Mailbird’s Email Tracking) and consultancy work across enterprises. He’s comfortable across the stack and life-cycle, from embedded IoT data visualization in mobile apps to designing custom UI automation frameworks for continuous delivery. Based in Poland, he brings a pragmatic, holistic approach to software craftsmanship and developer experience that often surfaces in polished, widely adopted tools.
8 years of coding experience
17 years of employment as a software developer
M.Sc. Computer Science, M.Sc. Computer Science at Uniwersytet Marii Curie-Skłodowskiej w Lublinie
English, Polish
Stackoverflow
84reputation
2kreached
4answers
0questions
Github Skills (12)
mobile-application10
xamarin10
mobile-development10
csharp10
app-dev10
dotnet-core10
skiasharp9
git6
workspace6
save6
layout6
visual-studio6
Programming languages (3)
Github contributions (5)
microsoft/SmartHotel360-Mobile
Sep 2018 - Sep 2018
SmartHotel360 Mobile
Role in this project:
Mobile Developer
Mobile DeveloperContributions:44 commits, 2 PRs in 21 days
Contributions summary:Piotr's contributions center on developing the mobile application for SmartHotel360. They focused on adding and refactoring services related to IoT data, specifically for room temperature and ambient light levels. Key changes include the creation of classes, modification of existing ones, and the integration of sensor data, reflecting a focus on features and data display within the mobile app. The user implemented charts to visualize the temperature and ambient light data, and added UI for current and desired values.
xamarinandroidmobilexamarin-forms
sourcegraph/cody-vs
Sep 2024 - Apr 2025
Cody for Visual Studio - an AI code assistant that uses advanced search and codebase context to help you write and fix code.
Contributions:71 reviews, 96 PRs, 197 pushes in 6 months
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