Роман

Roman Kushnir
Senior Frontend Engineer
[відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація») | Linkedin profile | Github profile | Vinnytsia, Ukraine

Professional summary
Senior Frontend Engineer with 7+ years of commercial experience, specializing in React and TypeScript, building
scalable, high-performance, maintainable web applications. Skilled in designing frontend architecture, optimizing
performance for complex, data-heavy workflows, and collaborating with product, design, and backend teams.
Experience working across multiple stacks and project types, including enterprise applications and complex web
platforms built with React, Vue, and Svelte.​
Mentored junior developers, conducted technical interviews, and contributed as a volunteer frontend engineer.
Currently expanding into fullstack development with hands-on experience in Node.js, Express and MongoDB.

Skills
Languages: TypeScript, JavaScript, HTML, CSS, SCSS
Frameworks & Libraries: React, Next.js, Vue, Nuxt.js, Svelte
State & Data: TanStack Query, Zustand, Redux, GraphQL
UI: Material UI, Tailwind CSS, PrimeReact
Testing & Automation: Jest, React Testing Library, MSW, Playwright
Build & Tooling: Vite, Webpack, Biome, ESLint, Prettier
Backend: Node.js, Express.js, MongoDB, Mongoose, Redis, AWS S3
AI-assisted tools: GitHub Copilot, Codex, Cursor

Work experience

Frontend Software Engineer
Exadel · Oct 2021 – Present
Stack: React, TypeScript, REST, Axios, TanStack React Query, Material UI, Zustand, Vite, Jest, RTL, MSW.

Migrated a large internal enterprise system used by ~2000 employees from a monolithic .NET + jQuery
application to a modern standalone React frontend, improving performance, scalability, and user experience for
complex data-heavy workflows.

●​ Designed and implemented a configurable Axios API client integrated with autogenerated OpenAPI
services, providing type-safe endpoints, centralized error handling, and request cancellation support.
●​ Developed advanced data aggregation and transformation logic to convert large raw datasets into
dynamic, filter-driven tables.
●​ Optimized performance of complex data-heavy UI components with multiple input states and dependent
calculations, eliminating UI freezes and improving responsiveness.
●​ Led major dependency migrations involving breaking changes across the codebase while maintaining
application stability.
●​ Improved frontend–backend data interaction patterns, optimizing API usage and client-side data handling.
●​ Integrated multiple third-party services (Google Drive Picker, Google Sheets export, Jira, Elastic APM,
Google Analytics), enabling performance monitoring, workflow management, and product analytics.
Frontend Developer
:Dedey · Jun 2020 - Aug 2021
Stack: JavaScript, Vue, Nuxt, Svelte, HTML, SCSS, WebSocket, REST.

Led the development of multiple complex, fully responsive front-end projects.

●​ Built a cryptocurrency exchange platform from scratch using Vue 2 and Nuxt (SSR), implementing user
authentication, live trading order books with WebSocket and Vue animations, and ensuring full
responsiveness across devices.
●​ Developed a corporate website using Svelte, implementing interactive animations, responsive layouts,
and pixel-perfect Figma-based designs.
●​ Conducted technical interviews and mentored junior developers, supporting team growth and
knowledge sharing.

Web developer
SmartPixel · Oct 2018 - Apr 2020
Stack: WordPress, WooCommerce, PHP, JavaScript, HTML, CSS, Advanced Custom Fields.

Developed 25+ websites including blogs, e-commerce stores, landing pages, and corporate websites using
WordPress and WooCommerce.

●​ Customized and extended existing WordPress themes based on design mockups using HTML, CSS,
JavaScript, and PHP.
●​ Integrated HTML/CSS layouts into WordPress and implemented dynamic content management using
Advanced Custom Fields (ACF).
●​ Optimized website performance and implemented on-page SEO improvements to improve PageSpeed
Insights scores.

Education

Junior Specialist Degree in Electrical Engineering
Vinnytsia Technical College · 2012 - 2016

Certifications

●​ NodeJS: Advanced Concepts | Udemy
●​ Learn and understand NodeJS | Udemy
●​ NodeJS - The Complete Guide (MVC, REST APIs, GraphQL, Deno) | Udemy
●​ Next.js & React - The Complete Guide | Udemy