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Yaroslav Okrema - Frontend Developer
in Linkedin [відкрити контакти](див. вище в блоці «контактна інформація») Telegram Пошта Dnipro, Ukraine

Summary
Frontend Developer with 3+ years of commercial experience building modern web applications with React,
TypeScript, and Next.js. Experienced in developing e-commerce platforms, responsive landing pages, and mobile
app integrations used by 20,000+ users. Skilled in building scalable frontend architectures, optimizing application
performance and Core Web Vitals, writing automated tests, and implementing CI/CD workflows. Strong team
player with mentoring experience and a proven ability to collaborate effectively in cross-functional teams.

Skills
Core: React, React Native, Next.js (SSR/SSG), TypeScript, JavaScript, HTML5, CSS3
State: Redux Toolkit, REST API, TanStack Query, Axios
Styling: TailwindCSS, SCSS/SASS, Material UI, ShadCN, Radix UI, Styled Components, Figma
Testing: Jest, Vitest, React Testing Library, Playwright
Tooling: Webpack, Vite, Turbopack, Docker, CI/CD, ESLint, Prettier, Git (GitFlow), Sentry, React-hook-form, Zod
Languages: English (Intermediate B1), Ukrainian

Experience
Frontend Developer Midstem 3 years 2 months, April 2023 - Present
Responsibilities:
Developed an e-commerce platform, implementing complex features such as shopping cart, product pages, and
checkout using Medusa Backend.
Developed and optimized the main landing page and core application pages, ensuring high responsiveness and
performance.
Initiated and developed a custom frontend CRM leveraging Medusa's API to overcome the customization
limitations of the default admin panel.
Designed and implemented end-to-end testing using Playwright, covering critical user flows such as product
browsing, cart, and checkout.
Designed, developed, and optimized a mobile app landing page from scratch, managing the full product lifecycle
from UI/UX to AWS deployment.
Achievements:
Improved store performance from 75 to 96 PageSpeed by implementing code-splitting, memoization, and caching.
O ptimized landing page performance from 85 to 100 PageSpeed using image optimization, memoization, and
other performance techniques.
Integrated Sentry SDK for both Next.js (Storefront) and Medusa (Backend), reducing the Mean Time to Detect
( M D for critical ugs
TT ) b by 80%.

A chieved a age peed score for the mobile app landing page through frontend performance optimizations.
100 P S

Education
Dnipro National University named after Oles Honchar
Bachelor of Applied mathematics, Computer modeling, and programming technologies, 2022-2026