Sergei Butko
Staff React Native Engineer
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolSergei Butko is a Staff React Native engineer based in Berlin with 12 years of hands-on experience building high-performance iOS and Android apps. He has led end-to-end mobile development at companies like Zattoo, Lowkey and DexTechnology, shipping and maintaining dozens of apps while driving performance improvements (stable 60 FPS and 60-80% faster responses) and introducing best TypeScript/React-Native practices. Sergei combines strong TypeScript expertise with native module development, developer tooling and automation, and has a track record of mentoring teams, running tech interviews, and creating internal templates and courses. He is an active GitHub maintainer who keeps personal projects current and contributes to open-source React Native work. Notably, he blends product-first delivery with platform-level optimizations—improving both developer productivity and runtime performance.
12 years of coding experience
8 years of employment as a software developer
Bachelor's degree Computer Software Engineering, Bachelor's degree Computer Software Engineering at Tver State Technical University
English, Russian, Ukrainian, German
Stackoverflow
2,620reputation
91kreached
44answers
3questions
github
top-5%
Github Skills (175)
e2e-testing10
testing10
automation10
e2e10
web-testing10
javascript10
webdriver10
chromium10
webkit10
youtube10
credit-card10
browser-automation10
firefox10
api10
input-mask10
Programming languages (14)
Github contributions (5)
dobladov/koreader-node-sync-server
Feb 2019 - Sep 2020
Self hostable synchronization service for koreader devices for node.js
Contributions:10 commits, 6 PRs, 15 pushes in 1 year 7 months
koreadersynchronizationnode-jssynchronization-servicenodejs
dobladov/click-pause
May 2016 - Dec 2019
Totem Plugin for pause and play with the right click.
Contributions:7 commits, 1 PR, 6 pushes in 3 years 8 months
totempausepluginright-clickclick
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