Krzysztof Cieślak
Otwock, Masovian Voivodeship, Poland
Summary
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RockstarKrzysztof Cieślak is a pragmatic web developer with 11 years of software experience and an active open-source footprint focused on F# and editor tooling. He has contributed to high-profile projects like Visual Studio Code, the F# compiler, Ionide, and Paket—work that spans backend language services, tooling, and editor UX improvements. His contributions frequently blend engineering and QA: expanding test suites, improving auto-completion and tooltips, and refining routing and dependency handling for real-world frameworks. Trained through a JavaScript full-stack course and driven to land his first web development role, he pairs practical front-end/back-end skills with a strong testing mindset. Known on GitHub as an “OSS Troublemaker,” he brings curiosity and a knack for improving developer experience that often surfaces as small, high-leverage fixes across complex projects.
11 years of coding experience
Stackoverflow
22reputation
54reached
6answers
0questions
Github Skills (65)
url-routing10
compiler-development10
testing10
language-service10
code-completion10
asp-net10
fsharp10
backend10
javascript10
dotnet-new10
dotnet10
editor10
typescripts10
tooltips10
mvc-framework10
Programming languages (18)
Github contributions (5)
ionide/FsAutoComplete
May 2015 - Nov 2022
F# language server using Language Server Protocol
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 releases, 18 reviews, 653 commits in 7 years 7 months
Contributions summary:Krzysztof contributed to the F# language server by implementing features related to code completion and tooltips. They modified the project's code to include glyphs (icons) in completion outputs and translated these glyphs into strings and characters for display. The user also refactored the tooltips and help text formats, modifying the data structures used in the responses and improving the overall user experience. They also focused on improving the documentation.
coc-nvimatom-pluginvisual-studio-codevimkakoune
ionide/ionide-vscode-fsharp
Oct 2015 - Jul 2022
VS Code plugin for F# development
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:397 releases, 8 reviews, 1173 commits in 6 years 10 months
Contributions summary:Krzysztof primarily contributed to the Ionide VS Code plugin for F# development, implementing core features. Their work included the development of tooltips, linters, and code lenses, enhancing the editing experience. They also integrated F# Interactive (FSI) support, enabling users to run code snippets directly within the editor. Additionally, the user worked on project scaffolding and various solution explorer functionalities.
editor-pluginfsharpvscodevscode-extensionionide
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