Leonid Kozarin
Java Software Engineer at beeline Russia
Amsterdam, North Holland, Russia
Summary
👤
Senior🎓
Top SchoolLeonid Kozarin is a JVM-focused backend engineer with 9 years of experience building and leading teams on Java and Kotlin microservices, most recently implementing business logic at Beeline and previously leading a small engineering team at Sberbank. He combines production-grade Spring/WebFlux and Kafka integrations with hands-on work in Python, Rust and Go—having built end-to-end Telegram bots and maintained pet projects showcased on his blog. Comfortable across monolith-to-microservice transitions, he has practical CI/CD and architecture experience along with writing unit tests and shaping release delivery. Based in Amsterdam but originally from Russia, he’s as curious about low-level computer behavior as he is about finance and cryptocurrencies, and he actively documents technical learnings to the community.
9 years of coding experience
6 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at Northern (Arctic) Federal University
Russian, English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (39)
telegram-bot10
inline9
java9
linux9
bots9
peewee9
telegram9
macos8
python8
aiogram8
windows8
conversions8
asynchronous8
handlers8
multiplatform7
Programming languages (6)
Github contributions (5)
kozalosev/DeskChanJava
Feb 2017 - Mar 2018
Contributions:4 releases, 146 pushes, 24 branches in 1 year
kozalosev/goSadTgBot
Apr 2023 - May 2024
Framework for development of Telegram bots
Contributions:5 releases, 7 PRs, 23 pushes in 1 year
frameworkgolanggolang-librarytelegramtelegram-bot
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