Iryna Vynnychenko
Senior Web & Frontend Developer — High-Performance React / Next.js Development & Product Engineering
4,200+ Upwork hours · 8+ years · 100+ launched projects
Why Work With Me
- •Full-cycle delivery — from design to live product
- •Senior-level frontend architecture
- •Clear communication, no agencies
- •Fast response & NDA-ready
- •Long-term collaboration mindset
I believe successful projects need more than code — they need care, consistency, and a developer who thinks ahead. That's why I focus on long-term collaboration: maintaining, improving, and scaling your website with bug-free code, flawless mobile adaptation, and smooth UX. If you're looking for someone to stand by your side and support your project's growth — I'm that person.
Direct, reliable, and always available for video calls & fast communication — let's build something.
Skills & Expertise
Senior-level frontend architecture across the full React / Next.js product stack
Core Stack
- •TypeScript
- •JavaScript (ES6+)
- •React
- •Next.js (App Router / Pages Router)
- •Full-stack Next.js (Server Components, Server Actions, API Routes)
- •REST APIs: Fetch · Axios · JSON
- •ES Modules (import/export)
- •Browser DevTools (Network, Profiler, Memory)
Architecture
- •Component-based architecture
- •Custom hooks
- •Feature-based structure
State & Data
- •React Query / TanStack Query
- •Redux
- •Zustand
- •Context API
- •GraphQL integrations
UI Engineering
- •Custom UI Kits & Design System implementation
- •Tailwind CSS · Styled Components · CSS/SCSS Modules
- •Semantic HTML5 · CSS Grid / Flexbox · Modern Layouts
- •Component lifecycle styling & Dynamic UI states
- •Responsive & Adaptive engineering (Flawless Mobile UX)
Performance
- •SSR / SSG / CSR
- •Code splitting & lazy loading
- •Core Web Vitals optimization for SEO & conversion
Testing & Workflow
- •Git / GitHub
- •CI/CD basics
- •Jest
- •React Testing Library
Animations & Interactions
- •GSAP · ScrollTrigger
- •Framer Motion
- •Micro-interactions & page transitions
- •Scroll-based storytelling
- •Interactive UI experiences
AI as a productivity accelerator
I leverage AI-assisted development tools (Cursor IDE, Claude Opus, ChatGPT, Antigravity CLI, Gemini) to automate repetitive tasks and accelerate setup and refactoring — while retaining full control over technical decisions, architecture, and final code quality.
Faster delivery without sacrificing architecture or quality.
Work Experience
Frontend Web Developer
Upwork
Freelance senior frontend developer on Upwork — full-cycle delivery from design to live product. High-performance React/Next.js apps, product engineering, and long-term collaboration with clients worldwide.
Key Achievements:
- •4,200+ Upwork hours · 100+ launched projects · 100% Job Success Rate
- •Full-stack Next.js: Server Components, Server Actions, API Routes
- •Performance optimization targeting Core Web Vitals for SEO & conversion
- •SSR / SSG / CSR, code splitting, lazy loading, debugging & profiling
Technologies:
Key Projects:
Frontend Web Developer
ETNA Network
Frontend development for a DeFi, gaming, and NFT ecosystem with interconnected products across blockchain and web3.
Key Achievements:
- •Built user-facing interfaces for DeFi and NFT products
- •Developed responsive, interactive UI for crypto ecosystem
- •Collaborated with cross-functional team on multi-utility platform
Technologies:
Key Projects:
Frontend Web Developer
LexStatus
Frontend development for a legal services company specializing in real estate documentation and property assessment in Ukraine.
Key Achievements:
- •Developed and maintained corporate website and client-facing interfaces
- •Implemented responsive layouts for legal services platform
- •Worked with design team on pixel-perfect implementations
Technologies:
Key Projects:
Education
Junior Frontend JS Developer
DAN.IT education
Intensive frontend JavaScript development program.
Key Courses:
JavaScript
ProCode IT
JavaScript fundamentals and modern ES6+ development.
Key Courses:
HTML, CSS, jQuery — Front End Developer
freeCodeCamp
Self-paced frontend development curriculum with hands-on projects.
Key Courses:
Certifications
Responsive Web Design
freeCodeCamp
Client Testimonials
“Iryna turned our Figma design into a live page flawlessly and ahead of schedule.”
Client
Figma to Live Page
“Iryna made a great job transforming design from Figma to the real landing page. We definitely will work with her again.”
Upwork Client
Landing Page Development
“Great communication. Was proactive about asking questions. By being interactive, asking questions, and making suggestions, it made the project better than if they just literally followed the instructions. Worked very quickly and finished ahead of schedule.”
Upwork Client
E-commerce Website
“Iryna was able to handle all of our change requests and keep projects moving forward. She worked great with our team. I wish she was able to be a full-time team member.”
Upwork Client
Long-term Collaboration
“Excellent collaboration experience. Iryna understands client needs and offers better solutions. The responsive design works perfectly on all devices.”
Upwork Client
Responsive Web Design
4,200+ Upwork hours · 100+ launched projects
Get In Touch
Questions or project ideas? Let's chat! 💬
Contact Information
Location
Kyiv, Ukraine
Upwork
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+380931844615Let's work together!
I'm always interested in new opportunities and exciting projects. If you have any questions or just want to say hello, don't hesitate to reach out!