Filip Kowal
Senior Frontend Developer at Heretto
Warsaw, Masovian Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolFilip Kowal is a Senior Frontend Developer based in Warsaw with 10 years of experience crafting performant, well-designed user interfaces using JavaScript, TypeScript, React, Vue and Storybook. He has shipped production front-ends for startups and software houses, including admin panels, SaaS widgets and a React/Gatsby tourism app, and currently develops at Heretto. Comfortable working in Scrum and Kanban, he bridges design and engineering—often taking a hands-on role in layout and interaction design as well as core programming. Open to new tools beyond his stack, he maintains practical side projects like a React/Node Spotify explorer on GitHub that reflect his focus on UX and real-world integrations.
10 years of coding experience
Magister (Mgr), Informatics, Magister (Mgr), Informatics at Uniwersytet Ekonomiczny w Krakowie
English, Polish
Stackoverflow
342reputation
115kreached
9answers
0questions
Github Skills (74)
vanilla-javascript10
hybrid10
javascript10
browser10
compiler10
static-site-generator10
nextjs10
react10
react-framework9
storybook9
global-state9
rights9
vercel9
server-rendering9
typescript9
Programming languages (5)
Github contributions (5)
callpage/intl-tel-input
Sep 2017 - Oct 2021
A jQuery plugin for entering and validating international telephone numbers
Contributions:2 PRs, 2 pushes, 1 branch in 4 years 1 month
jqueryjavascripttelephonejquery-plugininternational-telephone
filipkowal/dossier
Dec 2023 - Mar 2025
Contributions:2 PRs, 378 pushes, 4 branches in 1 year 3 months
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