Тарас

TARAS DEMIANIUK
FULL-STACK DEVELOPER
[відкрити контакти](див. вище в блоці «контактна інформація») [відкрити контакти](див. вище в блоці «контактна інформація»)
Kyiv, Ukraine, remote GitHub LinkedIn

ABOUT ME
Full-stack developer working with JavaScript, TypeScript, React, and Node.js. Developed a real-time
chat application featuring JWT authentication, Google OAuth, WebSocket communication, file uploads,
and group messaging. Experienced in building frontend and backend systems, implementing CRUD
operations, responsive user interfaces, and efficient data fetching using TanStack React Query. Work
with Agile practices using Git, Jira, feature-branch workflow, and code review. Participated in math,
English, and computer science competitions and received 15+ awards in school competitions.

SKILLS
Programming Languages: JavaScript (ES6+), TypeScript, SQL
Frontend: React, Redux, TanStack React Query, HTML5, CSS3, Sass (SCSS), Tailwind CSS, Material UI,
BEM
Backend & APIs: Node.js, Express, Socket.io, REST API, Fetch API, JSON
Databases & ORMs/ODMs: MongoDB, Mongoose, PostgreSQL, Sequelize
Authentication & Security: JWT, OAuth, Google OAuth, bcrypt
Libraries & Tools: Zod, Vite, Webpack, ESLint, Prettier, Git, Jira
Cloud & Deployment: Cloudinary, ImageKit CDN, Vercel, Render
Development Practices: SDLC, Agile, Scrum, Kanban, Waterfall, Feature Branch Workflow, Code
Review
Design: Figma, Canva
Soft Skills: Teamwork, Time Management

EXPERIENCE 2025 - PRESENT
Full-Stack Developer | Self-employed
Engineered full-stack real-time applications utilizing React, Node.js, Express, and MongoDB,
integrating WebSockets (Socket.io) for live messaging alongside secure JWT (access/refresh tokens)
and Google OAuth authentication flows.
Optimized React state management and component rendering by implementing batch operations for
bulk actions, alongside handling REST API asynchronous requests and error handling.
Collaborated within a 5-developer Agile team (Git, Jira, code reviews) to build an e-commerce
platform, configuring TanStack React Query for data fetching, response caching, and background
updates.

PORTFOLIO
Real-Time Chat Application – Demo | GitHub Code
Technologies: React, TypeScript, Tailwind CSS, Vite, React Router, Socket.io, Node.js, Express,
MongoDB, Mongoose, JWT, Passport.js, Google OAuth, bcrypt, Zod, Multer, Cloudinary, ImageKit CDN,
i18next, React Toastify.
Developed a fullstack real-time chat application with private messaging, group rooms, and live updates
using WebSockets (Socket.io).
Implemented a secure authentication system with JWT (access & refresh tokens), including Google
OAuth integration and email verification flow.
Built a scalable messaging system with features such as message reactions, pinning, editing, search,
and pagination.
Designed a fully responsive UI with theme switching (light/dark mode), localization (i18n), and mobile
layout.
Integrated file upload system with avatar management using Cloudinary and ImageKit CDN for
optimized image delivery.
Implemented room-based architecture with role-based permissions (room owner controls for editing
and deletion).
React Bookstore – Demo | GitHub Code
Technologies: React, TypeScript, Tailwind, TanStack React Query, HTML5, CSS, Git, react-toastify,
ImageKit CDN.
Collaborated in a team of 5 developers to build a bookstore platform with reusable UI components
(Button, Card, Input, Select, Pagination).
Implemented responsive BurgerMenu with full-screen overlay and auth-aware navigation logic.
Configured TanStack React Query for structured data fetching with caching and background
updates, reducing redundant API calls.
Developed reusable form primitives with validation support, improving consistency across the
application.
Integrated ImageKit CDN for optimised image delivery, enhancing performance and load times.

Todo App - Demo | GitHub Code
Technologies: React, TypeScript, REST API, HTML5, CSS3, Bulma.
Implemented a task management application with CRUD operations and status-based filtering.
Implemented optimised state updates, including single-item and batch operations (e.g., “mark all as
completed”), improving state consistency and reducing unnecessary re-renders.
Integrated REST API with asynchronous handling and error management.

Landing page - Demo | GitHub Code
Technologies: HTML5, SCSS(SASS), BEM.
Built a responsive layout for desktop, tablet, and mobile devices.
Implemented modular styling using BEM and SCSS.
Added interactive UI elements and effects (hover, transform: scale for icons and images).

EDUCATION
Taras Shevchenko National University of Kyiv | 2026 - present
Bachelor of Computer Science, Faculty of Information Technology
Currently pursuing a Bachelor's degree in Computer Science at the Faculty of Information
Technology.

Mate academy | 2025 - 2026
Frontend course at Mate academy (Git, HTML, CSS, JavaScript, Typescript, React, Web) Certificate