Konrad Kowalski
Warsaw, Masovian Voivodeship, Poland
Summary
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RockstarKonrad Kowalski is a versatile front-end and full-stack JavaScript engineer with 12 years of experience building performant, component-driven web applications. He specializes in modern React (hooks, Next.js, Gatsby), TypeScript, and state orchestration (Redux, XState), and pairs that with Node.js/NestJS back ends and SQL/NoSQL databases. Comfortable across build tooling (Vite, webpack, rollup, Babel), testing (Cypress, Jest), and design systems (Atomic Design, Storybook, Material-UI), he focuses on shipping maintainable, production-ready PWAs. Based in Warsaw, he’s an open-source-minded “React junkie” who blends pragmatic engineering (Docker, Debian) with a taste for front-end craftsmanship like SCSS, Tailwind, and styled-components. Notably, his stack fluency lets him move seamlessly between server-side rendering and client-first experiences to optimize user and developer workflows.
12 years of coding experience
Polish, English
Github Skills (156)
e2e-testing10
zero-configuration10
xmlhttprequest10
testing10
web-performance10
http-client10
e2e10
declarative10
javascript10
browser10
react-native-web10
validation10
vue-testing-library10
react-testing-library10
web-developer10
Programming languages (7)
Github contributions (5)
rootsher/react-core
Jun 2022 - Aug 2022
Core library for React projects
Contributions:1 review, 19 commits, 2 PRs in 1 month
reactreact-projectsreact-hookscore-libraryreactjs
rootsher/material-table
Dec 2019 - Jul 2020
Simple React material-ui table with search, sorting and pagination
Contributions:6 commits, 1 PR, 8 pushes in 7 months
reactpaginationsortingreact-materialmaterial-ui-table
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