Michał Kostrzyński
Lead Frontend Engineer at Stonly
Krakow, Lesser Poland Voivodeship
Summary
👤
Senior🎓
Top SchoolMichał Kostrzyński is a Lead Frontend Engineer based in Krakow with nine years of hands-on experience building performant, production-grade JavaScript applications. At Stonly he guides frontend architecture and performance optimizations, drawing on deep React expertise and a self-described passion for JS performance. His career spans agency work, adtech, and startups, giving him practical experience from native mobile apps and interactive web games to complex single-page applications. Comfortable both leading teams and diving into code, he combines a pragmatic focus on shipping features with a meticulous approach to runtime efficiency and user experience.
9 years of coding experience
4 years of employment as a software developer
Informatyka, Informatyka at Polsko-Japońska Wyższa Szkoła Technik Komputerowych w Warszawietechnik informatyk / IT technician Informatyka / IT, technik informatyk / IT technician Informatyka / IT at Zespół Szkół Licealnych i Technicznych nr 1 w Warszawie
English, Polish
Stackoverflow
364reputation
13kreached
15answers
3questions
Github Skills (121)
css-in-js10
drag10
styled-components10
visual-studio10
sortable10
razzle10
leiningen10
editor10
electron10
typescript10
vscode-extension10
draggable10
vscode10
react-router10
visual-studio-code10
Programming languages (8)
Github contributions (5)
DeviousM/react-pdf
Aug 2019 - Oct 2024
📄 Create PDF files using React
Contributions:11 pushes in 5 years 3 months
reactjsreactpdfpdf-files
DeviousM/razzle-plugin-svgr
Oct 2019 - May 2022
Contributions:13 commits, 5 PRs, 10 pushes in 2 years 7 months
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