vzaporozky
Smart Contract || Front End Developer (React, Type Script)
Full-stack Blockchain Developer with 2+ years of experience in Web3 and full-stack development. Specialized in building dApps, NFT marketplaces, and AI-integrated bots using Solidity, React, Node.js, and related tools. Passionate about secure blockchain solutions
Experience: 1 year
Yearly salary: $20,000
Hourly rate: $10
Nationality: 🇺🇦 Ukraine
Residency: 🇺🇦 Ukraine
Experience
NFT MarketPlace
Self-employed 2025 - 2025
Developed a full-stack NFT marketplace web app as a portfolio project. Implemented features including photo generation via OpenAI API, NFT minting, buying, and selling. Created two Solidity smart contracts using OpenZeppelin for Ownable, ERC721URIStorage, ReentrancyGuard, and Address. Front-end built with Scaffold-ETH 2; backend with Node.js, Fastify, OpenAI, and Prisma. Utilized Docker Compose for project setup. Solo developer; Deployed on testnet for demonstration purposes
Back-end Developer
Freelance 2025 - 2025
Created Telegram bot for extracting data from tables in photos. Used OpenAI Vision API for data extraction, Node.js with Telegraf for bot framework, Bull.js for queues, Prisma with MongoDB for storing users, balances, and requests, ExcelJS for generating tables, and Winston/Winston-Telegram for logging. Business case focused on efficient data extraction from photo-based tables; handled 10+ users and 5000+ requests with 98% accuracy.
Front-end Developer
Foxminded Software 2023 - 2023
Worked as a junior developer in a team of 18 on an LMS platform. Developed user interfaces using React and MobX for state management, integrated backend APIs with Axios, and optimized performance through techniques like lazy loading and memoization. Focused on interface development, backend integration, and performance enhancements.
Skills
blockchain
blockchain-engineer
css
docker
ethereum
git
hardhat
mongo
nestjs
nextjs
openzeppelin
postgres
react
redis
smart-contract
solidity
typescript
english
russian
ukrainian