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I'm Yosh (Yosh from Kemu), my real name is Roman Pietrzak. I'm a friendly person :) I have few minor edits on wikipedia.

I live in Poland, but at the moment I spend most of my time in Staines (UK), next to London. I'm software developer, I work a lot with node.js and JavaScript nowadays (full-stack dev). I play with Jenkins/Docker/AWS/kubernetes pipelines a lot, and with TDD/mocha/jest/selenium/pupeteer testing. In the past, I did a lot of C/C++ code, I love QT, I was also enjoying PHP and some Java. I love coding of GUI-s and procedural graphics.

My sites[edit]

  • My personal blog/site with more details about me: Yosh Kemu Personal website
  • I'm the owner of - Kemu Studio - company devoted to high quality software development (I prefer quality than speed).
  • I'm proud owner/author of and - which is a collection (250+) of web-based calculators for various subjects/categories like health (e.g. Body-Mass-Index, calories), taxes, deposits, income, loan cost, IP address, chemistry, math, physics and a lot more...
  • Zielona Góra W Sieci - is an "underground", "unofficial" site of my home city Zielona Góra (means "Green Hill" in english).