Каріна

Karina Kolesnichenko
Front End Developer

CONTACT Phone: [открыть контакты](см. выше в блоке «контактная информация») Address: Szczecin, Poland - remote
Email: [открыть контакты](см. выше в блоке «контактная информация») GitHub: github.com/lunavamp
[открыть контакты](см. выше в блоке «контактная информация») Open to B2B Poland/EU

SUMMARY Frontend developer with 3+ years of experience and a core stack of JavaScript, React, and
Next.js. Mainly built business-card sites, landing pages, catalog sites, online stores, and web
applications. As a hobby, actively run a development blog and mentor beginner developers.
Now seeking a dynamic development team where I can apply my experience, keep learning,
and keep leveling up as a specialist.

SKILLS Core: JavaScript, TypeScript, React, Next.js, Redux Toolkit, Zustand
Styling & UI: HTML5, CSS3, Sass/Less, Tailwind, MUI, Ant Design, Bootstrap, mobile-first
SEO-friendly markup: meta-tags, Open Graph, structured data schema.org
Tools: Webpack, Vite, Gulp, npm, ESLint, Docker
Performance & Optimization: SSR, CSR, SSG, Code Splitting, Lazy Loading, Lighthouse
API & Backend: REST API, GraphQL Apollo Client, Axios, Node.js basic
VSC: Git, GitHub, GitLab, Bitbucket
Design & UI: Figma, Adobe Photoshop, SVG, Responsive Web Design, Canva
Collaboration: Asana, Jira, Trello, Microsoft Teams, Slack
Soft skills: Organizational and planning abilities, Problem-solving and creativity,
Effective mentorship and instructional skills, Time management and deadline adherence

PROFESSIONAL Front End Developer | CrossFox.Online | March 2023 — Present
EXPERIENCE
Designed and implemented scalable front-end solutions—modular React components,
optimized data fetching, and mobile-first responsive layouts—across multiple projects, including
a Next.js catalog site with 1,000+ products, resulting in faster releases and improved user
engagement.

Designed and developed SPA/PWA using React and TypeScript, reducing initial
render time and boosting SEO.
Built and maintained a reusable MUI component library for consistent styling and
accelerated development; collaborated with designers to identify and fix critical
UX issues.
Worked with a legacy database to clean up bad data and fix broken images
Optimized performance through lazy loading, code splitting, and Core Web Vitals
analysis, trimming bundle size
Ensured mobile-first responsive layouts and cross-browser compatibility,
enhancing UX across devices.
Managed server state with React Query across REST and GraphQL projects,
boosting data-load performance.
 Project: Crystal Task for Crystal LLC, USA, November 2024 — present

Developed client-side of a React PWA for a cleaning-service platform with four user roles:
housekeeper, inspector, admin, owner, each featuring dashboards, admin panels, order/task
history and tracking; implemented modular MUI components and custom hooks, role-based
data fetching via React Query, FCM push notifications, and a mobile-first responsive design;
and crafted mobile-first promotional landing pages.

Main app stack: React + Vite, React Query, Zustand, MUI, Service Workers, Firebase Cloud
Messaging, NestJS .

Project: Dim Shyn, Ukraine, August 2024 — November 2024

developed a product catalog with 1,000+ items using Next.js App Router and Context API;
implemented client-side filtering and a dynamic product table; created a responsive gallery
with thumbnails and lightbox; generated SEO-friendly metadata on the fly;

Main app stack: Next.js, TypeScript, Context API .

Front End Developer and Mentor | Freelance | 2022 — Present

As a freelance developer, I created turnkey websites and web applications, as well as
modified existing projects. As a mentor I created training plans, notes, and
assignments for junior developers and helped them bring their projects to life.

Designed accessible, responsive UIs that balanced brand guidelines with modern
UX best practices.
Hand-coded front-end and back-end layers, integrating APIs, CMSs, and third-
party services as needed.
Deployed, optimized, and maintained live sites keeping load times under 2 s and
Lighthouse scores 90 +.

Data Research and Data Verification Specialist | INFUSEmedia, USA, October 2022
— February 2023
Worked with personal and business data using Google Sheets, a proprietary work
platform, and a UIPath bot.

Verified data for accuracy, error-free status, and up-to-date relevance.
Conducted data analysis by cross-referencing information with spreadsheets and
specific queries.

EDUCATION International University of Economics and Humanities | 2016-2020
Bachelor of Psychology

LANGUAGES Ukrainian — Native
Russian — Native
English — B2 Upper-Intermediate
Polish — A2 Pre-Intermediate

I hereby consent to the processing, storage, and distribution of my personal data contained in this résumé for recruitment purposes, in
accordance with applicable data-protection laws (including Regulation (EU) 2016/679 — GDPR).