Valerii Sidorenko
Software Engineer at Nebius
Amstelveen, North Holland, Netherlands
Summary
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RockstarValerii Sidorenko is a Software Engineer with 11 years of experience focused on front-end and full-stack web development, currently based in Amstelveen, Netherlands. He has strong practical experience improving developer-facing tools and UI components, having contributed bug fixes and refactors to high-profile open-source projects like freeCodeCamp and Gatsby. At Yandex Cloud and now Nebius he has applied this expertise to production services, bridging frontend polish with backend robustness—especially around development proxy and build tooling. His open-source work shows attention to maintainability and developer experience, from PropTypes and Monaco editor fixes to component theming and Storybook docs. Colleagues would describe him as a pragmatic engineer who quietly improves reliability and ergonomics across complex web stacks.
11 years of coding experience
3 years of employment as a software developer
Github Skills (21)
javascript10
ui-components10
css10
typescript10
proxy10
proxy-server10
prop10
proxies10
typescript-types10
props10
typescripts10
web-development10
gatsby10
react10
breadcrumb9
Programming languages (7)
Github contributions (5)
gravity-ui/uikit
Jan 2022 - Jan 2023
Role in this project:
Front-end Developer
Front-end DeveloperContributions:342 reviews, 30 commits, 208 PRs in 1 year
Contributions summary:Valerii primarily contributed to the UI components of the `uikit` repository. They addressed bugs related to the `ClipboardButton`, `Tabs`, `Breadcrumbs`, and `Tooltip` components, fixing styling issues and functionality problems. Furthermore, the user refactored the `Breadcrumbs` component, improving its structure and the handling of dividers. Several commits are also related to documentation and theming in Storybook.
freeCodeCamp/freeCodeCamp
Jul 2018 - Sep 2019
freeCodeCamp.org's open-source codebase and curriculum. Learn to code for free.
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:219 commits, 212 PRs, 39 pushes in 1 year 2 months
Contributions summary:Valerii primarily contributed to the freeCodeCamp codebase by addressing a variety of bug fixes, particularly within the JavaScript and React components. Their work included correcting invalid arguments in React PropTypes, fixing scripts for the challenge schema, and resolving issues related to the Monaco editor and Sass compilation. The user also updated project dependencies, including Gatsby, and refactored code for improved maintainability.
mathcurriculumreactlearn-to-code-for-freecss
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