Сергій

Serhii Shcherbaniuk [open contact info](look above in the "contact info" section)

[open contact info](look above in the "contact info" section)
Frontend Engineer
6+ years of experience

Skills Summary
Core Stack: React, React Native, Senior Frontend Engineer with extensive experience in
Next.js, TypeScript, JavaScript designing, building, and maintaining scalable web
applications. Skilled in frontend architecture,
Core Competencies: performance optimization, and complex application
flows. Experienced in working within international
Scalable frontend architecture
teams, mentoring developers, and delivering
(monorepo), High-performance
high-quality, maintainable solutions while solving
web applications
complex technical challenges.
(Core Web Vitals, SEO),
SSR / SSG / ISR (Next.js),
Complex state management & Professional experience
data flow, API integrations
(GraphQL, REST), End-to-end Elogic | Senior Frontend Developer
SDLC ownership 2022 – Present

State & Data: Redux, Redux Worked on large-scale, high-traffic e-commerce
toolkit, Zustand, TanStack Query, platforms with headless architecture, focusing on
Apollo GraphQL, Axios performance, scalability, and SEO.

Markup & Styling: HTML5,
Team Contribution & Mentorship:
SASS/LESS, Tailwind, CSS
Modules, Styled-components,
● Mentored and supported junior and trainee
Shadcn
frontend developers, guiding them from
Testing: Jest, React Testing entry-level to independent contributors
Library ● Conducted code reviews, provided structured
feedback, and helped resolve technical challenges
CMS: Contentful, Strapi, ● Contributed to onboarding process, including
Magento 2, AEM theoretical guidance and practical training tasks

Integrations & Monitoring: E-commerce Platform (Next.js, Headless)
Algolia, Constructor, Google Tag
Manager, Sentry ● Built and optimized scalable frontend
architecture using React and TypeScript
Tools: Git, Webpack, Gulp, PNPM
● Implemented SSR/ISR strategies improving
/ Yarn / NPM
performance and SEO visibility
● Improved Core Web Vitals (LCP, CLS) by
optimizing rendering strategy, resource loading,
Languages and image prioritization, resulting in faster page
Ukrainian - native load and better user experience
English - advanced ● Reduced performance bottlenecks and improved
responsiveness across key pages

Education ● Supported analytics integration to enable
data-driven product decisions
Khmelnytskyi National ● Improved project documentation and onboarding
University processes
Master’s degree in Computer ● Collaborated with designers, backend engineers,
Engineering and stakeholders to deliver business-critical
features and ensure alignment with product goals

React PWA and migration to Next.js

● Refactored legacy codebase, reducing technical
debt and improving development velocity
● Developed and enhanced React-based PWAs
● Led frontend migration from PWA to Next.js
architecture
● Worked within a monorepo (Turborepo) setup
with shared packages and multiple applications
● Improved performance, maintainability, and
developer experience
● Built and maintained reusable component library
shared across multiple projects, using Storybook
for component isolation and documentation
● Ensured consistency across multiple websites
within shared codebase

Checkout Optimization & Payments Integration

● Designed and optimized custom one-step
checkout flow
● Integrated payment providers (Adyen, PayPal,
Apple Pay, Google Pay, Tamara, Tabby)
● Solved race conditions and improved data
consistency in checkout flow
● Enhanced UX under slow API conditions
● Reduced user friction in checkout flow, improving
overall user experience and stability

Key achievement:

● Improved initial page load time by ~5x (from ~10s
to ~2–2.5s)

Search, CMS & Analytics Integrations

● Implemented product search using Algolia /
React InstantSearch / Constructor
● Integrated CMS solutions (Strapi, AEM, Contentful)
● Configured analytics and tracking (GTM,
Clevertap)
● Improved product discovery and content flexibility

Testing & Code Quality

● Implemented test coverage using Jest and React
Testing Library

● Participated in code reviews and improved
codebase stability
● Contributed to long-term maintainability and
scalability

Environment:

Next.js, React, TypeScript, GraphQL, TanStack Query,
Zustand, Tailwind CSS, CSS Modules, Shadcn, Storybook,
Algolia, Constructor, Strapi, AEM, Contentful, GTM, Jest,
React Testing Library, Sentry, CI/CD (GitHub Actions), Git,
Turborepo, PNPM / Yarn / NPM

Elogic | Frontend Developer (Adobe Commerce
PWA Studio)
2021 – 2022

Worked on React PWA-based e-commerce platforms
with focus on UI, checkout, and user experience.

E-commerce Platform (React PWA)

● Developed home page, product pages, catalog,
and checkout flows
● Implemented filters, sorting, and product
discovery features
● Integrated payment systems and checkout logic
● Customized UI based on Figma designs

Account & Dashboard Features

● Built and customized customer dashboards and
account pages
● Improved usability and navigation across user
flows
● Implemented internationalization (i18n)
● RTL layout support

Environment:

React, TypeScript, Redux, Redux toolkit, GraphQL, GTM,
Clevertap, Tailwind CSS, CSS Modules, SASS, REST API,
PageBuilder, Sentry, Git, Webpack, Yarn

Hexide Digital | Frontend Developer
2020 – 2021

Worked on web and mobile applications, including

PWAs and React Native apps.

E-commerce Platforms (Next.js)

● Built product catalogs and checkout flows
● Integrated REST APIs and payment systems
● Implemented filters, sorting, and UI
improvements

React PWA

● Developed a React-based PWA, implementing
secure authentication and authorization flows
and scalable user access management
● Developed admin panels, dashboards and data
management systems
● Designed scalable frontend architecture for
maintainability

Mobile Applications (React Native)

● Developed mobile apps with dashboards and user
flows
● Integrated third-party services and APIs
● Implemented authentication and payment
features
● Built interactive data visualizations using D3.js
and Canvas, optimizing rendering performance
for dynamic UI components

Environment:

React, React Native, Redux, REST API, D3.js, SASS, Next.js,
Git, NPM