Andrei Efanov
Software Developer GoLand at JetBrains
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolAndrei Efanov is an experienced software developer and engineering lead with 11 years building performant developer tools and data platforms, currently working on GoLand at JetBrains in Berlin. He combines deep academic training (postgraduate work in computational and applied mathematics) with hands-on systems engineering, from optimizing go list performance (cutting import times by up to 75%) to integrating LLM-based code completion and AI assistants for Go. Previously he led platform UI efforts—shipping a reworked terminal, migrating Compose-based UI to the IntelliJ ecosystem, and redesigning search/terminal for remote development—and built enterprise data workbenches and ML-powered scoring systems at Tinkoff. An active open-source contributor, he has patched and extended low-level cross-language tooling like jnr-ffi, showing attention to native interop and tooling internals. Colleagues would call him a pragmatic problem-solver who blends research rigor with product-minded delivery and a knack for improving developer experience.
11 years of coding experience
5 years of employment as a software developer
Master's degree, Computational and Applied Mathematics, Master's degree, Computational and Applied Mathematics at Московский Энергетический Институт (Технический Университет)Postgraduate (PhD), Computational and Applied Mathematics, Postgraduate (PhD), Computational and Applied Mathematics at Moscow Power Engineering Institute (Technical University)
English, Русский
Stackoverflow
107reputation
4kreached
7answers
4questions
Github Skills (19)
struct10
c1110
cffi10
java10
c1710
javas10
foreign10
ffi10
winapi9
apidoc9
wp-api9
ws-api9
api9
clib6
packet-capture6
Programming languages (19)
Github contributions (5)
jnr/jnr-ffi
Jun 2016 - Dec 2016
Java Abstracted Foreign Function Layer
Role in this project:
Back-end Developer
Back-end DeveloperContributions:13 commits, 19 PRs, 52 comments in 5 months
Contributions summary:Andrei primarily contributed to the `jnr-ffi` repository by fixing bugs, refactoring existing code, and adding new features related to the project's core functionality. They corrected typos, deleted unnecessary spaces in the Struct class, and addressed an issue related to inner structs within Unions. The user also implemented methods for array creation and expanded the available WinAPI types within the library.
javaforeign
goto1134/structurizr-d2-exporter
Jan 2023 - Feb 2023
Export structurizr views to D2 diagrams
Contributions:10 releases, 1 review, 15 commits in 1 month
d2structurizr
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