Frontend Developer with 4+ years of experience building web applications of varying complexity. I specialize in Vue.js, React, JavaScript, and modern web technologies, creating responsive, high-performance websites from scratch and supporting existing projects through maintenance and feature development. I've also led a small team of junior developers, taking on tech lead responsibilities such as task coordination, code review, and mentoring.
Recently, I've shifted my professional focus toward blockchain development. To support this transition, I've completed specialized training in smart contract engineering — working with Solidity, Ethers.js, Wagmi, Viem, and standards like ERC-20 and ERC-721. I'm now actively building and testing smart contracts and exploring dApp architecture.
I'm passionate about decentralized technologies and eager to grow as a blockchain developer, contributing to innovative Web3 projects.
Portfolio: github.com/JuliaKorolenko
Experience: 4 years
Yearly salary: $54,000
Hourly rate: $40
Nationality: 🇺🇦 Ukraine
Residency: 🇺🇦 Ukraine
Experience
Blockchain Developer (Personal Projects)
Freelance / Self-employed 2024 - 2026
Built and deployed production-ready decentralized applications with full-stack Web3 integration: - NFT Marketplace: ERC-721 smart contracts with minting, trading, and ownership transfer. IPFS storage via Pinata, MetaMask integration. Deployed to Sepolia testnet. Tech: Solidity, Hardhat, ethers.js, Vue 3, IPFS GitHub: https://github.com/JuliaKorolenko/nft-marketplace - DAO Voting System: Governance smart contracts for Ukrainian housing cooperatives with proposal creation and voting mechanisms. Event-driven architecture with real-time contract state updates. Tech: Solidity, Hardhat, ethers.js, TypeScript, Vite. GitHub: https://github.com/JuliaKorolenko/osbb-dao - DAO Voting System (v2): Rebuilding with React, Viem, and Wagmi for better Web3 integration (in progress) GitHub: https://github.com/JuliaKorolenko/osbb-dao-react
Front-end developer
LLC ASTARTA TRADING 2023 - 2024
Rewriting the internal document management product to Vue.js 2, Creating new web applications for internal use of Vue.js 3, Writing a custom widget for Power BI (TypeScript), Development of various functionality using Vue.js
Front-end developer
BAZU Company 2021 - 2023
Work with existing projects, including refactoring, development of new functionality, Development of new projects: project architecture, creation of service components, main components, implementation of abstract methods, Development of various functionality using Vue.js
Front-end developer
Ezlogz 2019 - 2020
The development of some functionality (authorization, validation, receiving and processing data from the server), The development of an interactive svg graph with the ability to edit and save it, Development of various functionality using Vue.js
Front-end developer
FEX.NET 2017 - 2019
Layout of templates, work with react-components, receiving and processing data from the server, writing functionality with js (search, gallery etc.), The development of simple logic of react-components, creating the admin panel for a small application Fex-radio using Vue.js, Adaptive, responsive, cross-browser and cross-platform layout, BEM, Sass, Vue.js-workflow
Skills
ethereumjs
hardhat
javascript
react
smart-contract
solidity
typescript
vue
web3
front-end
english
russian
ukrainian