Bartosz Klukaczewski
Expert React Native Developer
Gdańsk, Pomeranian Voivodeship, Poland
Summary
🤩
Rockstar🎓
Top SchoolBartosz Klukaczewski is an Expert React Native developer and tech leader with 6+ years building mobile-first products and scaling teams—he has led and mentored groups up to 20 engineers and shipped apps with over 1M users. He combines hands-on full‑stack skills (React Native, TypeScript, MERN) with product and monetization experience from founding Plantswapp and serving as CTO in multiple startups. At STX Next he created a React Native practice that grew to nearly 20 developers and contributed seven‑figure annual revenue, and he remains an active open-source contributor (notably to callstack/react-native-slider) and technical writer for .NET docs. Comfortable in fast-moving, agile startups, he values ownership, transparency and quality, and brings a rare mix of sales, management and deep UI/UX curiosity—currently focusing on browser add-ons and cross-platform mobile excellence from Gdańsk.
5 years of coding experience
8 years of employment as a software developer
Bachelor of Engineering - BE Computer Science, Bachelor of Engineering - BE Computer Science at Gdańsk University of Technology
Polish, English, German
Github Skills (17)
ios10
react-native10
dotnet-new10
dotnet10
android-development10
dotnet-core10
csharp10
documentation10
linq9
javascript9
markdown9
markdown-it9
typescripts8
react-native-component8
typescript-types8
Programming languages (10)
Github contributions (5)
callstack/react-native-slider
Jan 2021 - Jan 2023
React Native component exposing Slider from iOS and SeekBar from Android
Role in this project:
Mobile Developer (Android/iOS)
Mobile Developer (Android/iOS)Contributions:30 releases, 166 reviews, 356 commits in 2 years
Contributions summary:Bartosz primarily contributed to bug fixes and feature enhancements within the React Native slider component. Their work included addressing platform-specific issues, such as a Windows OS crash related to step frequency and the iOS "can't drag to the end of track" problem. They also updated the example application to use the latest versions of React and React Native, refactored the example app structure, implemented a controlled value property, and fixed an issue where the `onChange` event wasn't triggered for taps on Android.
reactreact-nativesliderreact-native-componentandroid
dotnet/docs
Jan 2021 - Jan 2023
This repository contains .NET Documentation.
Role in this project:Technical Writer
Technical WriterContributions:31 reviews, 9 commits, 94 PRs in 2 years
Contributions summary:Bartosz contributed to the .NET documentation repository by modifying and expanding existing content. Their commits focused on refining and improving documentation related to C# language features, specifically around record types, anonymous types, and LINQ. The user also worked on examples for F# and corrected formatting and spacing issues across multiple articles.
dotnetfsharpvisual-basiccsharpdotnet-core
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