Korneliusz Rabczak
Lead Architect at SAP
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolKorneliusz Rabczak is a Lead Architect based in Berlin with 12 years of experience building and re-architecting complex backend systems in Java and Scala, currently driving architecture at SAP. He specializes in functional Scala (Cats, http4s, doobie, fs2), streaming and batch processing with Apache Beam/Scio on Google Cloud, and has steered product transformations from monoliths to scalable cloud-native designs. A pragmatic clean-code and TDD evangelist, he pairs hands-on development with technical leadership—facilitating event-storming, defining bounded contexts, and aligning engineering strategy with business goals. His work spans security and compliance initiatives (SOC-2, ISO 27001) and post-acquisition architecture alignment, demonstrating an ability to navigate organizational and technical change. An active open-source contributor, he has improved back-end features and maintainability in community projects like jvm-bloggers. Outside work he’s an avid learner with a dry sense of humor (and a pet turtle), suggesting curiosity and patience in equal measure.
12 years of coding experience
13 years of employment as a software developer
Master of Science (MS) Applied Informatics, Master of Science (MS) Applied Informatics at Gdańsk University of Technology
English, Polish
Github Skills (17)
admin10
adminjs10
java10
javas10
xadmin10
pagination10
spring-boot10
wicket10
microblogging9
newsletter9
blogpost9
rest-api8
api-rest8
restful-api8
api-design8
Programming languages (4)
Github contributions (5)
jvm-bloggers/jvm-bloggers
Jul 2016 - Aug 2016
JVM Bloggers - website and newsletter with JVM blogs from Poland
Role in this project:
Back-end Developer
Back-end DeveloperContributions:11 commits, 2 PRs, 3 comments in 25 days
Contributions summary:Korneliusz focused on developing back-end features, including the implementation of a mailing address panel for an admin interface. They created models, request handlers, and pages to display and manage mailing addresses. The user also introduced pagination to improve data handling. Furthermore, the user worked on refactoring code, including an abstract class for mailing pages, enhancing the overall structure and maintainability.
bloggersjvmbloggingakkapoland
kornelrabczak/thecookiezen-blog
Aug 2015 - Oct 2024
Contributions:24 pushes, 2 branches in 9 years 3 months
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