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IRYNA KOROLOVA
MIDDLE FRONT-END ENGINEER (REACT / TYPESCRIPT)

Lviv, Ukraine Phone: [open contact info](look above in the "contact info" section) Email: [open contact info](look above in the "contact info" section) LinkedIn: [open contact info](look above in the "contact info" section)

SUMMARY:
Front-End Engineer with 3+ years of commercial experience building e-commerce and marketing web applications. Specialized in
React, Next.js, and TypeScript, with a strong focus on web accessibility, performance optimization, and maintainable, testable code.
Experienced in owning features end-to-end — from requirements clarification and collaboration with designers to implementation,
testing, and release — while working effectively in agile, cross-functional teams.

PROFESSIONAL EXPERIENCE:
EPAM Systems – Front-End Engineer
Aug 2022 – Present · Lviv, Ukraine / Remote

ECommerce HealthTech Platform (Next.js, React, TypeScript)
Collaborated within a 12-person frontend team to successfully migrate a legacy SAP Hybris monolith to a scalable
headless architecture powered by Next.js, Contentful CMS, and a GraphQL orchestration layer.
Implemented complex UI features including a robust Product Listing Page with multi-level tree filtering and sorting,
leveraging GraphQL to optimize data fetching for large product sets.
Engineered accessible shared front-end components for an internal library, driving visual consistency and code
reusability across a multi-site e-commerce ecosystem.
Maintained high code quality and consistent styling across the project through ESLint and Prettier, actively contributing
to peer code reviews and unit testing workflows in Azure DevOps.

Enterprise Coaching Platform – Web & Marketing Site (React, Gatsby, TypeScript, Contentful)
Delivered 15+ production-ready marketing and product pages using React and Gatsby with Static Site Generation (SSG),
achieving sub-second initial load times and improved Lighthouse performance scores.
Managed Content Models in Contentful, including defining field schemas, references, and validations.
Improved SEO and accessibility (WCAG) via semantic HTML and ARIA attributes.
Implemented PWA capabilities using Gatsby plugins, improving offline support, caching, and overall user experience.

Global eCommerce Platform (React, Next.js, TypeScript)
Developed and maintained shared React/Next.js components reused across several e-commerce sites, ensuring UI
consistency within a microservices-based architecture.
Configured analytics and marketing tracking via Google Tag Manager, enabling business teams to adjust campaigns and
monitor user behavior without code changes.
Wrote unit and integration tests with Jest and React Testing Library to support safe refactoring and prevent regressions.
Fixed accessibility, UI and functional defects, ensuring consistent behavior across devices and browsers.

TECHNICAL SKILLS:
Core Stack: JavaScript, TypeScript, React, Next.js (App Router, SSR, SSG), Gatsby, Context API, Redux Toolkit, TanStack
Query (React Query)
UI & Styling: Tailwind CSS, Styled Components, CSS Modules
Data & Integrations: GraphQL, REST APIs, Contentful CMS, Google Tag Manager
Testing & Quality: Jest, React Testing Library, Storybook, ESLint, Prettier
Architecture & Practices: Headless front-end, BFF, Web Accessibility (WCAG 2.1), Core Web Vitals, performance
optimisation
Tooling: Git, Azure DevOps, Jira, Bitbucket, Vite, Webpack, Postman, GitHub Copilot, Claude

LANGUAGES: EDUCATION: ADDITIONAL TRAINING:
Ukrainian – Native Lviv State University of Internal EPAM University Front-End Program
English – Upper-Intermediate (B2+) Affairs - Law Department Claude Certified Architect –
Master’s Degree in Law Foundations Certification