Mateusz Zieliński - Owner at Roombelt

Mateusz Zieliński

Owner at Roombelt

Pomeranian Voivodeship, Poland

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Summary

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Senior

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Top School

Mateusz Zieliński is a seasoned software engineer and founder with 11 years of experience building customer-focused web products and leading distributed teams. He led front-end development for LenelS2’s OnGuard web UI—used by high-security clients including U.S. federal agencies—while acting as Scrum Master and mentor across three continents. Since 2018 he has run Roombelt as a solo founder, owning design, development, DevOps, support and sales for a conference room scheduling display used by dozens of organizations worldwide. Comfortable switching between hands-on coding and product strategy, he has deep React/TypeScript expertise and a track record of delivering reliable software in demanding environments. Known for combining technical rigor with customer empathy, he also brings uncommon experience shipping a commercial product end-to-end as a one-person company.

11 years of coding experience

12 years of employment as a software developer

Master of Engineering (M.Eng.) Informatyka Stosowana, Master of Engineering (M.Eng.) Informatyka Stosowana at Gdańsk University of Technology

Liceum Ogólnokształcące im. Józefa Wybickiego w Kościerzynie

Polish, English

Github Skills (43)

google-workspace10

accessibility10

ajax10

javascript10

displays10

xmlhttprequest10

browser10

keyboard10

http-client10

webapp10

nodejs10

intellij9

assistive-technology9

intellij-plugin9

Programming languages (3)

TypeScriptJavaJavaScript

Github contributions (5)

ziolko/intellij-javascript-symbols

Jan 2016 - Apr 2020

Support for symbols in JavaScript for IntelliJ platform

Contributions:2 releases, 36 commits, 1 PR in 4 years 3 months

intellij-platformsymbolsjavascriptintellij-pluginintellij

ziolko/frontendpopolsku

Dec 2017 - Jan 2018

Contributions:27 commits, 33 pushes, 5 branches in 17 days

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