Kirill Korinsky

Berlin, Germany

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Summary

🤩

Rockstar

Kirill Korinsky is an independent IT consultant based in Berlin with 18 years of experience specializing in low-latency, high-performance, and high-availability JVM systems (Java, Scala, Clojure). He routinely tunes large Elasticsearch clusters (100+ TB disk, 10+ TB RAM, hundreds of billions of documents), reduces JVM GC pauses and counts, and engineers sub-millisecond (~200μs) response paths for production services. A pragmatic engineer and systems maintainer, he contributes to notable open-source projects—improving Scala Native compatibility, fixing compiler and build issues in mrustc, and enhancing tooling like ScalaTest and MacPorts—demonstrating deep cross-language runtime knowledge. His public write-ups on percolate query rewrites, GC tuning, atomic JVM operations, and subtle sleep semantics reveal a habit of turning operational problems into reproducible insights. Colleagues can expect a hands-on consultant who blends low-level memory and concurrency expertise with practical production-scale maintenance.

18 years of coding experience

English, Russian

Stackoverflow

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Github Skills (44)

git10

macports10

c-language10

jvm10

python10

scala-native10

llvm10

testing10

memory-management10

test-framework10

sbt10

media-library10

magit10

emacs-lisp10

scala10

Programming languages (39)

C#CElmM4GoCommon LispHTMLErlang

Github contributions (5)

macports/macports-ports

Nov 2020 - Jan 2023

The MacPorts ports tree

Role in this project:

Back-end Developer

Contributions:545 reviews, 728 commits, 828 PRs in 2 years 1 month

Contributions summary:Kirill primarily contributes to the MacPorts ports tree by updating packages. Their work includes updating the Singular computer algebra system, SBCL, and GCL to new versions. These updates involve applying patches, fixing compilation issues, and ensuring compatibility with various operating systems, specifically macOS.

macosxpackage-managermacports-portsportsmacports

scala-native/scala-native

Oct 2020 - Oct 2021

Your favorite language gets closer to bare metal.

Role in this project:

Back-end Developer & System Maintainer

Contributions:71 reviews, 17 commits, 39 PRs in 1 year

Contributions summary:Kirill primarily focused on improving the Scala Native project by addressing several bugs and improving compatibility with different JDK versions. Their contributions include fixing issues in `BufferedInputStream.read()`, resolving type inference issues related to `Constable` in JDK12+, and preventing memory overflows in unit tests. Additionally, the user implemented improvements to the build process by supporting MacPorts and fixing potential memory management issues in the zone allocator.

scala-nativebare-metalmetalnativecompiler

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