Костянтин

Kostiantyn Myroshnychenko
CONTACTS

Location
JavaScript developer
Lublin, Lublin Voivodeship, Poland
SUMMARY
Remote
Results-oriented JavaScript Developer with a strong proficiency in building full-stack web
applications. Expert in developing interactive and high-performance front-end interfaces Email
using React and building scalable back-end services with Node.js. Proven track record of [open contact info](look above in the "contact info" section)
delivering end-to-end projects, with a deep understanding of modern JavaScript, RESTful
Phone
APIs, and database management.
[open contact info](look above in the "contact info" section)
Telegram
https://t.me/New_const
EDUCATION Sep 2021 - Feb 2026
LinkedIn
Bachelor of Computer Science | Lublin University of
[open contact info](look above in the "contact info" section)
Technology
myroshnychenko/
Specialized in software development and system architecture.
GitHub
CERTIFICATIONS: https://github.com/KonstMiron
Hillel IT School:
Fullstack JavaScript(2025) Excellent (1st Place). [Certificate: 39756250] LANGUAGES
JavaScript Basic(2024) Excellent (1st Place). [Certificate: 15382171]
Ukrainian C2
SKILLS Polish B2
Languages: JavaScript, TypeScript, PHP, HTML5, CSS3, SCSS English B1
Front-end: React.js, Redux, Tailwind CSS, Bootstrap, Responsive Design
Back-end & CMS: Node.js, Express, WordPress, REST API, AI Integration
Blockchain: Viem, Ethereum, Smart Contracts, AMM/DEX, Uniswap V2, Web3
Tools: Docker, MongoDB, MySQL, Git, GitHub, Postman, NPM

PROFESSIONAL EXPERIENCE

Full-stack Developer | Ukrimporttrade LLC Jul 2023 - Mar 2025
Full-stack Development: Developed and maintained shinadiski.com.ua, a high-traffic e-commerce platform using PHP and JavaScript.
Front-end: Built responsive UI and complex product filters using jQuery, Tailwind CSS, and Bootstrap to improve user experience.
Back-end & DB: Optimized MySQL databases and managed server-side logic, handling thousands of product SKUs and search queries.
Integrations: Implemented RESTful APIs for payments

MotoCar Tracker (Engineering Diploma Project) | MERN Stack Feb 2025 - May 2025
Full-stack System: Engineered a comprehensive vehicle tracking and data management platform.
Core Functionality: Developed a custom CRUD system for vehicle management with real-time data handling using Node.js and MongoDB.
Frontend Architecture: Built a dynamic and responsive dashboard with React, ensuring efficient state management and user-centric interface.

AI Recipe Generator (Full-stack App) | PERN Stack, Tailwind CSS v4, Gemini AI Jul 2025 - Sep 2025
AI Integration: Implemented Google Gemini AI to generate personalized recipes based on pantry items, including dietary filters (Keto, Vegan,
etc.) and nutritional data.
Full-stack Architecture: Engineered a responsive UI with Tailwind v4 and a robust backend using Node.js/Express with a normalized
PostgreSQL database hosted on Neon.
Advanced Features: Developed a comprehensive Meal Planner with weekly navigation, a one-click Shopping List to Pantry sync, and an
automated expiry alert system.
Security & UX: Integrated secure JWT authentication with bcryptjs and implemented user preference settings to pre-fill the AI generator for a
seamless UX.

School Web Platform | WordPress Sep 2020

Website Development: Designed and deployed the official website for Kyiv School No. 281 (school281.kyiv.ua) using WordPress.
Customization: Configured a user-friendly CMS structure for educational content management and customized styles to meet the school's
requirements.
DEX Simulator | Node.js, Viem, Uniswap V2 Mar 2026
Blockchain Integration: Connected to Ethereum Mainnet via Viem PublicClient and HTTP RPC to fetch real-time reserves from Uniswap V2
USDC-WETH smart contract.
AMM Implementation: Implemented constant-product formula (x * y = k) to simulate token swaps with 0.3% LP fee calculation and slippage
analysis.
Fuzz Testing: Designed automated fuzz testing with randomized swap amounts (100–100,000 USDC) to demonstrate non-linear slippage
behavior across pool sizes.
Architecture: Built modular service-oriented structure separating blockchain data fetching, swap calculation, statistics, and display logic into
independent modules.