Jerzy Jelinek
Engineering Manager at Allegro
Greater Poland Voivodeship
Summary
👤
Senior🎓
Top SchoolJerzy Jelinek is an Engineering Manager and long-serving web performance leader at Allegro with 11 years of experience shaping frontend quality and speed across a high‑traffic e-commerce site. He progressed from webdeveloper to senior frontend engineer, team leader and now manager, combining hands‑on optimization work with coaching teams to make performance-friendly choices. A performance enthusiast and short-sentences lover, he authors practical articles on web performance best practices for Allegro’s tech blog. Jerzy focuses not only on technical optimizations but also on creating a supportive developer environment and translating performance trade-offs for non‑technical stakeholders. Based in Greater Poland, he brings a solid academic foundation in computer science and a track record of embedding measurable performance improvements into product development.
11 years of coding experience
1 year of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at Uniwersytet im. Adama Mickiewicza w PoznaniuI Liceum Ogólnokształcące im. Braci Śniadeckich w Żninie
Polish, English
Github Skills (28)
js-api8
vitejs7
lazy-loading7
lazyload7
css-modules7
iframe6
purejs6
postcss5
css5
javascript4
visualization4
sveltekit4
vite4
typescript4
responsive-images4
Programming languages (3)
Github contributions (5)
jln-pl/grunt-release-plugin
Jul 2015 - Dec 2015
Contributions:18 commits, 1 PR, 15 pushes in 4 months
jln-pl/js-360
Jul 2015 - Feb 2016
Contributions:22 commits, 2 PRs, 81 pushes in 6 months
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