Attila Lendvai
Open Source Developer at Self-employed
Hungary
Summary
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Rockstar🎓
Top SchoolAttila Lendvai is an open source developer from Hungary with 20 years of experience building everything from games to enterprise financial systems, and a long-standing preference for Lisp. He has deep low-level chops—starting with assembly as a child—and today contributes to core Common Lisp projects like SBCL and Clasp, improving compiler stability, debugging, and build infrastructure. As a former co-founder who delivered government-facing Common Lisp web applications, he pairs pragmatic production experience with tooling and DevOps expertise, including Nix/Guix packaging for languages like Idris. Attila chooses projects selectively: he only works on open source initiatives and applies an explicit ethical filter that excludes big corporations. His contributions include non-obvious improvements such as suppressing printer errors in SBCL and optimizing code-generation scrapers for portability and startup time. Educated as an electrical engineer at the Technical University of Budapest, he blends systems-level thinking with developer ergonomics.
20 years of coding experience
17 years of employment as a software developer
Masters, Electrical Engineering, Masters, Electrical Engineering at Technical University of Budapest
English, Hungarian, German, Russian
Stackoverflow
1,330reputation
129kreached
24answers
0questions
lisp
top-5%
Github Skills (33)
debugging10
debug10
nix10
macros10
bash10
script10
compiler-compiler10
common-lisp10
foreign10
build-automation10
compiler10
error-handling10
lisp10
scripting9
git9
Programming languages (25)
Github contributions (5)
cffi/cffi
Jun 2007 - Feb 2022
The Common Foreign Function Interface
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 reviews, 56 commits, 17 PRs in 14 years 10 months
Contributions summary:Attila primarily contributed to the `cffi/cffi` repository by enhancing the library's functionality with new features and addressing specific needs of the common foreign function interface. They implemented new macros such as `with-foreign-strings`, added support for compiler flags with `:cc-flags`, and fixed existing functionalities. Further contributions involve refactoring and refactoring the code, alongside documentation, and test improvements.
foreign-function-interfacelisp-interpreterlispforeignffi
clasp-developers/clasp
Oct 2016 - Jun 2018
clasp Common Lisp environment
Role in this project:Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:84 commits, 7 PRs, 29 pushes in 1 year 8 months
Contributions summary:Attila contributed to the core infrastructure and build processes of the Clasp Common Lisp environment. They implemented and modified build scripts, including the `wscript` build system, to improve build usability and support for git tags. Significant changes were made to the scraper, a tool used for code generation and header file management, to optimize its startup time and portability. Further commits involved cleanup and maintenance tasks across the codebase, showcasing their involvement in the project's overall health.
lisp-interpreterlispclaspcommon-lispcompiler
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