Каріна

Karina Kolesnichenko
Frontend Developer | React, Next.js

Poznań, Poland Open to UoP or B2B, Poland/EU
[open contact info](look above in the "contact info" section) [open contact info](look above in the "contact info" section)
[open contact info](look above in the "contact info" section) github.com/lunavamp

ABOUT ME
Frontend Developer with 3.5+ years of commercial experience in React and Next.js. Most of my work
has been for clients of a digital agency: corporate websites, landing pages, e-commerce catalogs,
booking and pricing tools, and web applications, built from Figma and Adobe XD designs. I pay close
attention to performance: my live sites typically score 90+ in Lighthouse and load in under 2
seconds.

TECH SKILLS
Core: JavaScript (ES6+), TypeScript, React, Next.js
State & Data: Zustand, React Query, REST API, Axios
Styling: HTML5, CSS3, Sass/SCSS, Material UI, Mobile-First, RWD
Performance & SEO: SSR, SSG, CSR, Core Web Vitals, Lighthouse, SEO metadata
Tools: Git, GitHub, Vite, Webpack, ESLint, npm, Firebase Cloud Messaging, PWA
Design & Collaboration: Figma, Adobe XD, Photoshop, Asana, Slack, Microsoft Teams

WORK EXPERIENCE
Front End Developer | Crossfox.Online (digital agency) Mar 2023 – Mar 2026
Worked on a range of client projects, from landing pages and corporate websites to e-commerce
catalogs and web applications. Turned Figma and Adobe XD designs into responsive, mobile-first
interfaces and supported the projects after launch. Selected projects:
Crystal Task: an app for managing cleaning services with five user roles (housekeeper, inspector,
cleaning company, admin, owner). Built role-specific dashboards, task tracking and order history with
modular MUI components and React Query.
• Implemented PWA functionality with offline support, so specialists could keep working with an
unstable internet connection.
• Integrated Firebase Cloud Messaging to send push notifications for new assignments and cleaning
status updates.

Dim Shyn: a Next.js automotive catalog with 1,000+ products. Built the filter system and a dynamic
product table, and generated SEO-friendly metadata for each product page.
Pstryku: a Next.js food delivery platform. Implemented real-time dish customization and dynamic
cart price calculation with Zustand, along with a complex responsive layout for the ordering flow.
Ozarks Cleaning: a corporate website with a multistep service pricing calculator and integrated
booking.

Online Verification Specialist | INFUSEmedia Sep 2022 – Feb 2023
• Researched, analyzed and verified data to ensure accuracy in client projects.
• Managed data in Google Sheets and automated parts of the workflow with a UiPath bot.

Front End Developer & Mentor | Freelance
• Built turnkey websites and web applications and updated existing projects for clients.
• Deployed and maintained live sites, keeping load times under 2 s and Lighthouse scores at 90+.
• Ryas Agency: a development studio website built with Next.js, with multilingual support via
next-intl, templated pages, and form submissions sent to a Telegram bot and email.
• Mentor beginner developers: prepare learning plans and assignments, and guide them through
their first projects.

EDUCATION
Bachelor’s degree in Psychology | International Economics and Humanities University

LANGUAGES
Ukrainian & Russian - Native | English - B2 | Polish - A2

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of the European Parliament and of the Council of 27 April 2016 (GDPR).