Vasyl

VASYL SLEZINSKYI
Frontend Engineer | React • TypeScript • Next.js
vasylskyi​@gmail.com [відкрити контакти](див. вище в блоці «контактна інформація») Wrocław, Poland LinkedIn
GitHub Telegram

PROFILE HARD SKILLS
Experienced React Frontend Developer with over 3 years Frontend
of building scalable and maintainable web applications. React
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Skilled in React, Redux, RTK, and TypeScript, with Next.js
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experience implementing real-time features via web Redux /​RTK
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sockets. I thrive in cross-functional Agile teams and TypeScript
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focus on delivering high-quality, intuitive user JavaScript
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experiences. Always eager to learn and take on complex React Router DOM
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challenges. React Hook Form
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SCSS /​CSS
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Tailwind
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EXPERIENCE Webpack /​Vite
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RTK Query
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LG Energy Solution
Frontend Developer Additional Tools
10/2023 – Present | Wrocław, Poland Git
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Unified platform for lithium-ion battery production cycle Postman
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automation and quality control. Jest
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Built real-time dashboard modules for machine status
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Sentry
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and batch tracking using Shadcn-UI and React- CI/​CD
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virtualized to handle high-frequency data without
performance drops.
Integrated Sentry for error tracking with source maps,
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EDUCATION
reducing software-related downtime by 30% by
accelerating debugging of interfaces interacting with Bachelor's Degree in Automation and
PLC via REST APIs. Computer-Integrated Technologies
Developed a dynamic constructor for digital checklists
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Ivano-Frankivsk National Technical University of Oil and
and QC forms using React Hook Form with Zod Gas
validation, adaptable to various battery chemistries 09/2017 – 06/2021 | Ivano-Frankivsk, Ukraine
and technical specs.
Designed inventory management UI with batch-
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number filtering and real-time warehouse sync via RTK LANGUAGES
Query.
Optimized rendering of high-density analytical charts
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Ukrainian
with code splitting, memoization (React.memo, Native
useMemo, useCallback).
English
COMFY Upper-Intermediate
React Developer
09/2022 – 10/2023 | Remote Polish
Development and optimization of a high-traffic Upper-Intermediate /​Advanced
electronics marketplace and internal retail management
systems. Russian
Built a high-performance storefront with advanced
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Native
filtering and full-text search, integrated via RTK Query
for real-time pricing and stock synchronization.
Improved LCP and CLS metrics on PDP and PLP pages
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via lazy-loading, code splitting, and memoization -
critical for SEO and user retention.
Implemented React-virtualized for infinite product
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scroll, maintaining 60 FPS across thousands of catalog
items.
Developed a flexible checkout form constructor with
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React Hook Form and Zod, handling complex delivery
logic and pickup point selection.
Integrated Sentry for real-time bug detection in
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Checkout flow, improving payment transaction
success rate.