KAROLINAZIELONKA

Hi there, I'm Karolina! ✨

💻 React & React Native Developer | Frontend Lead

Based in Cracow, I am a frontend developer dedicated to building polished web and mobile experiences. Currently, I lead the frontend development of my project, focusing on maintainability and close collaboration with backend teams.

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Skills

Core Technologies

JavaScript & TypeScript

ES6+, async patterns, type-safe codebases

React & React Native

Production mobile apps, hooks, performance optimization

Next.js

SSR, SSG, App Router, API routes

Styling & UI

Tailwind CSS

Utility-first styling, responsive design

Styled-components

CSS-in-JS, theming, dynamic styles

Animations & A11y

Framer Motion, Reanimated, WCAG compliance

State & Data

Zustand & MobX

Global state, reactive stores, persistence

Firebase & Supabase

Auth, Firestore, real-time databases

Navigation

React Navigation, React Router, Expo Router

Quality & DevOps

Testing

Jest, React Testing Library, TDD approach

Git & GitHub

Version control, code reviews, collaboration

Docker

Containerization, development environments

Python HTML5 CSS3 REST APIs Expo Performance Optimization

Hobby

When I'm not coding, you'll find me outdoors pushing my limits or diving into a good book.

Mountain Hiking

Day trips in the mountains

Reading

Sci-fi, fantasy & self-development

Contact

Interested in working together? I'd love to hear from you!