Dariusz Niemczyk
Director Of Software Engineering at phoelid.me
Warsaw, Masovian Voivodeship, Poland
Summary
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RockstarDariusz Niemczyk is a Director of Software Engineering based in Warsaw with over a decade of hands-on experience across full‑stack, frontend, and backend development. He’s fluent in TypeScript/React ecosystems and has improved UX and robustness in high-profile open-source Matrix projects like Element Web and matrix-js-sdk, contributing both UI fixes and WebRTC/call-handling improvements. Dariusz moves comfortably between leadership and coding—recently transitioning from senior engineering roles into director-level responsibilities while still consulting and shipping bugfixes. His background spans startups and agencies where he built and maintained custom frameworks, mobile apps, and real-time features, and he brings a pragmatic, product-focused approach to engineering execution. A detail-oriented problem solver, he often tackles subtle UI regressions and type-safety gaps that improve long-term maintainability.
11 years of coding experience
12 years of employment as a software developer
Polish, English
Github Skills (17)
javascript10
matrix10
event-handling10
typescript10
user-interface10
ui-design10
uid10
sdk10
front-end-development10
typescript-types10
typescripts10
webrtc10
react10
google-recaptcha9
recaptcha9
Programming languages (15)
Github contributions (5)
matrix-org/matrix-react-sdk
Jul 2021 - Jan 2022
Matrix SDK for React Javascript
Role in this project:
Front-end Developer
Front-end DeveloperContributions:130 reviews, 122 commits, 101 PRs in 6 months
Contributions summary:Dariusz primarily focused on improving the user interface and user experience within the `matrix-react-sdk` repository, related to the authentication process. They addressed a grecaptcha error and fixed styling comments, ensuring the captcha form functioned correctly. They also made multiple updates to the `CaptchaForm.tsx` and global types files, fixing regressions and ensuring the correct rendering of the captcha component, as well as addressing styling issues. The user's contributions appear to be focused on ensuring UI component functionality.
javascriptreactmatrix-chatmatrix-sdkmatrix
element-hq/element-web
Jul 2021 - Oct 2021
A glossy Matrix collaboration client for the web.
Role in this project:Front-end Developer
Front-end DeveloperContributions:33 reviews, 25 commits, 26 PRs in 2 months
Contributions summary:Dariusz primarily contributed to the Element Web project by fixing and improving the user interface. They resolved an issue with reCAPTCHA errors in the authentication flow, modifying the `CaptchaForm.tsx` and related types. Additional contributions include fixing styling comments and making the `errorText` property optional. Moreover, they also addressed several visual and functional bugs, including fixing incorrect heights, and enhancing the overall user experience.
javascriptcollaborationmatrix-collaborationkaiosmatrix
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