Sergei Grishchenko
Senior Software Engineer at Noones
Tbilisi, Georgia
Summary
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RockstarSergei Grishchenko is a Senior Software Engineer based in Tbilisi with 10 years of experience building and modernizing front-end architectures for marketplaces and wallet products. He has led teams and technical initiatives at Paxful to remove legacy tech, unify stacks, and design microfrontend architectures enabling independent deployment and stronger type safety. Sergei contributes to notable open-source projects—improving Kotlin React wrappers, refining React hooks testing utilities, and enhancing the Fela styling library—demonstrating a focus on API design, SSR support, and testability. He blends hands-on coding with low-level design work: resolving cyclic dependencies, redesigning unsafe module APIs, and upgrading CI/CD and localization pipelines. Comfortable across full-stack roles earlier in his career, he’s effective at turning sprawling codebases into maintainable, cost-efficient platforms. Colleagues describe him as a pragmatic engineer who elevates team skills while shipping measurable platform improvements.
10 years of coding experience
5 years of employment as a software developer
Github Skills (17)
kotlin10
styles10
javascript10
react-hooks10
stylesheets10
ui-components10
testing10
css10
css-in-js10
testing-library10
component-kit10
react10
api-design9
typescript9
typescript-types9
Programming languages (8)
Github contributions (5)
JetBrains/kotlin-wrappers
May 2021 - Jan 2023
Kotlin wrappers for popular JavaScript libraries
Role in this project:
Front-end Developer
Front-end DeveloperContributions:201 reviews, 90 commits, 410 PRs in 1 year 8 months
Contributions summary:Sergei primarily contributed to enhancing the Kotlin wrappers for React-based JavaScript libraries. Their work included supporting server-side rendering features by adding `renderToString` and `renderToStaticMarkup` functions. They also focused on improving the consistency of React hook APIs, specifically regarding dependencies for `useEffect` and `useLayoutEffect`. Additionally, the user deprecated certain hook signatures and introduced the `ComponentType` interface, showcasing a focus on API design and component management.
kotlin-jsreactcssjavascriptstyled-components
robinweser/fela
Mar 2018 - Apr 2019
State-Driven Styling in JavaScript
Role in this project:Front-end Developer
Front-end DeveloperContributions:30 commits, 23 PRs, 56 comments in 1 year
Contributions summary:Sergei primarily focused on enhancing the `fela` library, a state-driven styling solution for JavaScript. Their work involved implementing and refining features within the core library, specifically addressing pure component wrappers and their behavior. They also contributed to documentation and testing, including creating test cases for pure component wrappers and configuring the typescript example. The commits suggest a focus on improving the library's flexibility and developer experience.
reactstate-drivencssjavascriptcss-in-js
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