Michał Niedziółka
Frontend Developer at Allegro
Krakow, Lesser Poland Voivodeship
Summary
🤩
RockstarMichał Niedziółka is a frontend developer based in Krakow with four years of professional experience and a background stretching from Java development to independent game work. He currently builds user-facing features at Allegro and has contributed notable front-end improvements and UX fixes to high-profile open-source projects like MDN's interactive examples. His open-source work on the Nu Html Checker shows a deep attention to web standards and accessibility, implementing nuanced validation for attributes like imagesrcset/imagesizes and nested SVG elements. Comfortable across the stack, he combines practical UI polish with standards-driven validation expertise, a mix that helps catch subtle rendering and compatibility issues before they reach users.
4 years of coding experience
6 years of employment as a software developer
Stackoverflow
132reputation
480reached
1answer
2questions
Github Skills (17)
validations10
css10
validation10
java10
javas10
web-standards10
html10
validate10
ui-design9
linter9
web-development8
web-development-project8
responsive-design8
javascript7
devtools7
Programming languages (8)
Github contributions (5)
mdn/interactive-examples
Mar 2022 - Jan 2023
Home of the MDN live code editor interactive examples
Role in this project:
Front-end Developer
Front-end DeveloperContributions:81 reviews, 111 commits, 184 PRs in 10 months
Contributions summary:Michał primarily focused on improving the user interface of the MDN interactive examples. Their contributions centered around fixing visual bugs in dark mode, specifically addressing issues with CSS properties like box-shadow, text-overflow, white-space, and text color within borders. The user also implemented new examples for CSS properties, including border-radius and the newly introduced properties for logical properties such as margin and padding, demonstrating a focus on enhancing the visual presentation and user experience of the interactive examples. Further contributions include implementing text-combine-upright, improving examples, and correcting existing examples.
reactcssjavascriptlive-codenodejs
validator/validator
Oct 2022 - Dec 2022
Nu Html Checker – Helps you catch problems in your HTML/CSS/SVG
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:6 reviews, 24 commits, 35 PRs in 1 month
Contributions summary:Michał primarily worked on the Nu Html Checker, focusing on improving HTML/CSS/SVG validation. Their contributions include implementing checks for HTML attributes like `imagesrcset`, `imagesizes`, and `media` in `<meta>` elements. They also addressed issues related to autocomplete, `<link>` element attributes, and nested SVG and figure elements, enhancing the validator's accuracy and coverage.
lintercheckerproblemscssjavascript
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