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Jakub T. Jankiewicz

Open-source developer with 15+ years of experience, active Polish Wikipedia editor, mentor, and official Wikimedia Polska trainer. Lead creator of the WikiZEIT project and photographer.

⚽ Live Match: jcubic - Info Live Streaming 2026 Poland ⚽ Live Match: jcubic - Info Live Streaming 2026 Joined on  ⚽ Live Match: jcubic - Info Live Streaming 2026 https://jakub.jankiewicz.org ⚽ Live Match: jcubic - Info Live Streaming 2026 ⚽ Live Match: jcubic - Info Live Streaming 2026

Education

Kielce University of Technology

Eight Year Club
Seven Year Club
Six Year Club
Writing Debut
Five Year Club
8 Week Community Wellness Streak
4 Week Community Wellness Streak
2 Week Community Wellness Streak
Four Year Club
1 Week Community Wellness Streak
Three Year Club
Two Year Club
How to get access to DOM from Service Worker?

How to get access to DOM from Service Worker?

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2 min read

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How to Start with Open Source - AMA

How to Start with Open Source - AMA

⚽ Live Match: jcubic - Info Live Streaming 2026
1 min read
Polish Blog About Wikipedia

Polish Blog About Wikipedia

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1 min read
Your own Terminal-styled portfolio website

Your own Terminal-styled portfolio website

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Better Syntax Error Messages in JavaScript

Better Syntax Error Messages in JavaScript

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2 min read
Git Web Terminal and Isomorphic Git

Git Web Terminal and Isomorphic Git

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1 min read
Hack to Run React Application inside Service Worker

Hack to Run React Application inside Service Worker

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3 min read
How to become Front-End Developer

How to become Front-End Developer

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5 min read
Save chatGPT conversation as HTML file

Save chatGPT conversation as HTML file

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4 min read
How to create React Higher-Order Component in TypeScript

How to create React Higher-Order Component in TypeScript

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Created a Simple P2P Browser Chat in JavaScript

Created a Simple P2P Browser Chat in JavaScript

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Architecture for Non-Trivial R Shiny Applications

Architecture for Non-Trivial R Shiny Applications

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8 min read
How to get Yolo badge on GitHub?

How to get Yolo badge on GitHub?

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What was your last mistake as a Programmer?

What was your last mistake as a Programmer?

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How to create interactive terminal like website with JavaScript?

How to create interactive terminal like website with JavaScript?

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11 min read
How to make your own programming language in JavaScript

How to make your own programming language in JavaScript

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How to get a literally free CDN

How to get a literally free CDN

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GitHub Action to clear cache on Images in README

GitHub Action to clear cache on Images in README

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JavaScript Online Interpreter

JavaScript Online Interpreter

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1 min read
How to make your first Open Source contribution in few seconds

How to make your first Open Source contribution in few seconds

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RPC in Next.js

RPC in Next.js

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Favicon for Next.js and TypeScript

Favicon for Next.js and TypeScript

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How I've created Photo in single div CSS

How I've created Photo in single div CSS

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How to promote your Open Source project with SEO

How to promote your Open Source project with SEO

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How I've defeated my mental illness and become web developer

How I've defeated my mental illness and become web developer

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