Krzysztof Romanowski
Head Of Developer Productivity at VirtusLab
Krakow, Lesser Poland Voivodeship
Summary
🤩
Rockstar🎓
Top SchoolKrzysztof Romanowski is a seasoned Scala engineer and developer productivity leader with 12+ years of experience, currently Head of Developer Productivity at VirtusLab. He combines deep JVM debugging and profiling expertise with hands-on tooling work—authoring the Hoarder sbt plugin to speed up compilation reuse—and has contributed to flagship projects like the Scala 2/3 compilers and the IntelliJ Scala plugin. He has progressed through technical and leadership roles at VirtusLab, building platforms for large-scale Scala development and shaping developer workflows. An active community organizer, he runs ScalaSphere and multiple regional JVM meetups, bridging open-source contributions with grassroots knowledge sharing. Notably, his compiler-level contributions reflect a focus on performance and build reliability that quietly improve developer velocity at scale.
12 years of coding experience
11 years of employment as a software developer
Bachelor's degree Computer Sience, Bachelor's degree Computer Sience at AGH University of Krakow
Polish, English
Stackoverflow
21reputation
227reached
1answer
0questions
Github Skills (30)
debugging10
debug10
evaluation10
expressions10
document-generation10
intellij-idea10
java10
scala10
javas10
evaluator10
eval10
compiler-design10
expression10
performance-optimization10
scala-compiler10
Programming languages (11)
Github contributions (5)
scala/scala3
Jul 2020 - Mar 2022
The Scala 3 compiler, also known as Dotty.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:244 reviews, 345 commits, 150 PRs in 1 year 8 months
Contributions summary:Krzysztof contributed to the Scala 3 compiler project by implementing and improving features related to documentation generation. The commits focused on refining the handling of comments, adding support for various documentation elements, and integrating them with the code. The changes involved enhancing the parsing of code elements and enabling more detailed information to be displayed within the documentation.
compilerscala3scaladottyepfl
scala-ide/scala-ide
Dec 2014 - Oct 2015
Scala IDE for Eclipse
Role in this project:Back-end Developer
Back-end DeveloperContributions:13 commits, 2 PRs, 16 comments in 10 months
Contributions summary:Krzysztof primarily contributed to the implementation of an expression evaluator within the Scala IDE, focusing on debugging functionalities. Their work involved designing and implementing methods to invoke methods, create new instances, and handle static method calls. They added tests and refined the implementation of the expression evaluator, with specific attention to supporting nested lambdas and local implicit values/methods. They also addressed dependency issues in the project build.
javascalaideeclipse
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.