Roman Kolisnyk / Frontend Developer

A good guy, skilled in HTML, CSS, JS/TS, UI/UX, minimalism, perfectionism, pragmatism, altruism.
Love creating things that look clean, work fast & smooth, make sense, and make the world better.

experience working with complex products, large teams & managing small ones
creating scalable, fast, accessible, semantic, animated, thoughtful UI/UX
strong attention to details
reliable & responsible

🧑‍💻 Experience
airSlate / UI -> Frontend Developer & UI Tech Leader
Oct 2019Feb 2025 (took a break)
SaaS company providing workflow automation, document management, e-signatures, PDF editing, and no-code solutions to 100+ million users worldwide
- Developed UI & functionality for products: pdfFiller (editor), pdfFillerSDK, airSlate (editor), signNow (editor), trueEdit (editor & landing page)
- Refactored legacy Pug components into scalable React + TS architectures
- Built and maintained UI Kit from scratch for consistent & fast development
- Configured and maintained Storybook for UI documentation and testing
- Cut UI codebase by >50% to increase performance, reduce bundle size, improve maintainability and clarity
- Delivered clean solutions covered by unit and E2E tests
- Enhanced performance, accessibility, and semantics across products
- Maintained and debugged existing & legacy codebases
- Automated workflows with CI/CD
- Led technical initiatives, conducted code reviews & interviews, shared knowledge through mentorship/presentations/documentation
HTML, Pug, CSS, SASS, JS, TS, React, Redux, Thunk, Saga, Storybook, Jest, Playwright, Webpack, Vite, Gulp, Git, GHA, JIRA, SonarQube, Grafana, Kibana, Allure, Figma, etc.
hexa / UI + Frontend Developer
Sep 2018Oct 2019
Service company providing copywriting, programming, marketing, CRM development, content management, and web design solutions for global corporate clients
- Created a lot of interactive, user-friendly, animated web pages
- Built reusable UI components for order forms/dashboards with PHP integration
- Maintained & optimized a lot of legacy code
- Significantly enhanced performance, accessibility, semantics of the pages
- Created responsive emails & interactive promo campaigns
HTML, SASS, JS, jQuery, Vue.js, PHP, WordPress, Bootstrap, GSAP, Gulp, Git, Avocode, Figma
freelance / UI + Frontend Developer & Designer
Jan 2018Sep 2018
- Developed e-commerce websites, landing pages, and custom CMS-based solutions
- Redesigned, optimized, debugged existing websites
- Implemented custom functionality tailored to client needs
- Designed and built responsive pages for various CMS platforms
- Configured SEO and hosting environments
HTML, SASS, JS, jQuery, PHP, Yii2, WordPress, OpenCart, Bootstrap, Gulp, Git, Sketch, Zeplin

🤹 Skills
- langs: UA (native), EN (upper-intermediate)
- dev langs: HTML, CSS, JavaScript, TypeScript
- frontend:
  - React, Next.js, Redux, RTK, Router, Query
  - Jest, Testing Library, Playwright
  - Webpack, Vite, Gulp
  - Tailwind, shadcn/ui, Framer Motion
  - Strapi, WordPress
- dev practices:
  - SOLID, KISS, DRY, YAGNI principles
  - CI/CD, BEM, accessibility (A11Y), cross-browser & adaptive/responsive layout, semantic HTML, web animations, performance optimization, mobile-first approach
- tools & services:
  - Git, GitHub Actions (GHA), TeamCity
  - JIRA, Confluence
  - ESLint, Prettier, Husky, SonarQube, Allure
  - Storybook, Chromatic
  - yarn, npm, CLI
  - Figma, Sketch, Zeplin
🎓 Education
NTUU "Kyiv Polytechnic Institute"
Automation of electromechanical systems and electric drive
😻 Interests
- 🤘 Ultra-heavy metal, songwriting, guitar playing, extreme vocals, mixing & mastering
- 👨‍🎨 Design, minimalism, tech
- 🏎️ Cars, F1
- 🐸 ...otherCommonHobbies

Roman Kolisnyk / Frontend Developer

A good guy, skilled in HTML, CSS, JS/TS, UI/UX, minimalism, perfectionism, pragmatism, altruism.
Love creating things that look clean, work fast & smooth, make sense, and make the world better.

🧑‍💻 Experience

airSlate / UI -> Frontend Developer & UI Tech Leader

hexa / UI + Frontend Developer

freelance / UI + Frontend Developer & Designer

🤹 Skills

🎓 Education

😻 Interests