Sergey Kaplun
Middle Software Developer at Tarantool
Moscow, Moscow City, Russia
Summary
🤩
Rockstar🎓
Top SchoolSergey Kaplun is a Middle Software Developer with eight years of experience specializing in low-level systems and Lua/LuaJIT runtime integration, currently contributing to the Tarantool server team in Moscow. He has deep hands-on expertise in embedding and testing language runtimes, developing tooling like LuaJIT platform metrics and a memory profiler, and improving core database internals such as memory usage and table encoding. His open-source work on the high-performance Tarantool database demonstrates practical knowledge of concurrency, fiber yields, and hard-to-debug null pointer issues. Trained as a physicist at Lomonosov Moscow State University, Sergey brings analytical rigor to performance optimization and complex testing strategies that let the same suites run against both LuaJIT and Tarantool binaries.
7 years of coding experience
3 years of employment as a software developer
Lomonosov Moscow State University
Github Skills (12)
c1710
lua10
messagepack10
c1110
in-memory9
database9
debug9
debugging9
databases9
refactoring8
appserver7
transaction7
Programming languages (8)
Github contributions (5)
tarantool/tarantool
Jan 2020 - Jul 2022
Get your data in RAM. Get compute close to data. Enjoy the performance.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:637 reviews, 56 commits, 266 PRs in 2 years 6 months
Contributions summary:Sergey primarily contributed to refactoring and improving the Tarantool database core and Lua-related components. They addressed memory usage, optimized table encoding, and fixed null pointer dereference issues. Additionally, the user implemented and fixed several Lua-related issues, including handling fiber yield and memory profiling. Their contributions demonstrate a strong understanding of the internal workings of the Tarantool database system.
luarammsgpackdiskclose
Buristan/tarantool
Mar 2022 - Mar 2025
Get your data in RAM. Get compute close to data. Enjoy the performance.
Contributions:285 pushes, 84 branches in 3 years
ramcloseperformancedatabasecompute
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