Jarosław Rencz
Front-End Developer at Wonga
Warsaw, Masovian Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolJarosław Rencz is a Front-End Developer with 14 years of experience specializing in AngularJS single-page applications, Node.js tooling, front-end operations and web performance, currently building user-facing systems at Wonga in Warsaw. He pairs deep front-end craft—CSS/JS component work and cross-browser fixes—with back-end REST API experience, having previously led front-end teams and rebuilt full-stack systems for university and nonprofit projects. An active open-source contributor, he’s improved UI component rendering in the widely used Storybook project, including Safari-specific fixes and MDX integrations that show attention to design-system consistency. Known for pragmatic problem solving, he brings leadership from prior lead roles and editorial experience to bridge technical implementation with product and stakeholder needs.
14 years of coding experience
9 years of employment as a software developer
XXVII LO im. Tadeusza Czackiego w WarszawieWarsaw University of Technology
English, German, French
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (16)
typescript10
javascript10
typescripts10
ui-design10
react10
typescript-types10
storybook10
web-components9
system8
css8
html8
vue7
angular7
svelte7
documentation6
Programming languages (14)
Github contributions (5)
storybookjs/storybook
Dec 2022 - Jun 2023
Storybook is the industry standard workshop for building, documenting, and testing UI components in isolation
Role in this project:
Front-end Developer
Front-end DeveloperContributions:3 reviews, 1 PR, 10 comments in 5 months
Contributions summary:Jarosław contributed to the Storybook project by addressing UI-related issues and improving the component rendering. They fixed a height adjustment problem in the ZoomElement component, specifically for Safari browsers. The user also merged branches and updated documentation related to framework feature support, and added and removed code related to the mdx-gfm integration. They have demonstrated experience in modifying UI components and integrating them into a design system.
web-componentsui-developmentvueui-componentsjavascript
jrencz/eslint-plugin-jasmine
Apr 2016 - Nov 2019
ESLint rules for Jasmine
Contributions:5 pushes, 3 branches in 3 years 7 months
eslintjavascripteslint-configjasminerules
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