Jędrzej Rochala
Scala Developer at VirtusLab
Łódź Voivodeship, Poland
Summary
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Rockstar🎓
Top SchoolJędrzej Rochala is a Scala-focused compiler and tooling engineer with six years of experience building developer-facing systems and IDE support. He has worked on the Scala 3 compiler (Dotty), contributing notable enhancements to language-server completions for MatchType cases and named patterns—improvements that directly benefit developer productivity in a widely used, flagship open-source project. At Scala Center he maintained IDE-integrated compiler components, Metals support and Scastie, and now continues honing Scala tooling at VirtusLab. He combines deep compiler internals knowledge with practical delivery of robust tests and performance-minded fixes, and often operates at the intersection of language design and editor ergonomics. Based in Łódź Voivodeship, Poland, he brings both research-caliber rigor and hands-on engineering to the Scala ecosystem.
6 years of coding experience
2 years of employment as a software developer
Engineer's degree, Computer Science, Engineer's degree, Computer Science at Wroclaw University of Science and Technology
Github Skills (5)
dotty10
compiler-design10
code-completion10
scala10
language-server9
Programming languages (10)
Github contributions (5)
scala/scala3
Mar 2022 - Aug 2022
The Scala 3 compiler, also known as Dotty.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:167 reviews, 69 commits, 103 PRs in 5 months
Contributions summary:Jędrzej primarily contributed to the Scala 3 compiler, specifically enhancing the completion features for the language server. They implemented code completions for `MatchType` cases, and improved support for named patterns and other edge cases related to patterns. The contributions involved modifying code in the compiler and language server, including adding tests to verify the implementation.
compilerdottyscalascala3epfl
rochala/scastie
Aug 2022 - Nov 2025
An interactive playground for Scala
Contributions:197 pushes, 104 branches in 3 years 3 months
scalajsscalafunctional-programmingplayground
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