Sergey

SERGEY MIRONENKO
FULLSTACK DEVELOPER
SUMMARY
I'm a Full-stack Web3 and Blockchain developer with a Master’s Degree in
Computer Engineering. Proficient in a wide tech stack including Rust,
Solidity, TypeScript, React, and Node.js. Started my journey with
JavaScript, now I have successfully transitioned into deep blockchain
development, creating custom consensus models for Substrate and building
smart contracts for EVM, Tron, and Solana. My portfolio includes end-to-end
development and frontend integration of NFT Marketplaces,
CONTACTS Staking/Vesting mechanisms, Presale platforms, and a Solana Web3 game. I

[open contact info](look above in the "contact info" section) also design and implement Subsquid indexers for high-performance data
querying. With a strong foundation in classical web development and a
[open contact info](look above in the "contact info" section)
passion for smart contract security and architecture, I approach each task as
Kharkiv, Ukraine/remote a personal challenge. I possess an Upper-Intermediate level of English,
Can work during blackouts enabling seamless communication and teamwork in global projects.

EXPERIENCE
SKILLS Fullstack developer 2023 - 2026
Typescript, JavaScript Developing and maintaining the user interface;
React, Redux, Zustand Implementing design on mobile websites;
Programming scalable and clean code;
HTML5, CSS3, Sass (SCSS), BEM
Full-cycle application development;
Node.js, Express, JWT, Passport
Designing product development strategies;
Fetch, Axios, REST API, SQL, Prisma Selection of the most suitable technologies;
Smart Contracts, Web3.js / Ethers.js Product optimization;
Rust, Solidity Fixing bugs and testing for usability.

Hardhut, Foundry, Jest
PORTFOLIO
Figma
Token Presale & Vesting DApp – a full-stack decentralized application
Git/GitHub, VS Code, Chrome implementing a whitelist-based token presale with automatic vesting.
Developer Tools (incl. React), NPM Users can connect their wallet, switch to the Sepolia test network, verify
English: Upper-Intermediate whitelist eligibility via Merkle Proof, purchase tokens with native currency,
and claim unlocked allocations after the cliff period according to a linear
vesting schedule. The project combines upgradeable smart contracts, a
EDUCATION backend service for Merkle proof generation, and a React frontend with
Master’s Degree “Computer Engineering” real-time presale and vesting dashboards (Solidity, OpenZeppelin
National Technical University “Kharkiv Upgradeable Contracts, UUPS Proxy, AccessControl, Merkle Tree,
FastAPI, PostgreSQL, Web3.py, React, TypeScript, Vite, Wagmi, Viem,
Polytechnic Institute”
RainbowKit, Tailwind CSS). The smart contract source code is proprietary
2016 – 2021
and owned by client, therefore only the deployed application can be
shared. The application is deployed on the Sepolia testnet and requires
ADDITIONAL switching the connected wallet to the Sepolia network before use.
EDUCATION Demo

Fullstack course at Mate academy Web3 consulting landing – a responsive landing page for a Web3
(Git, HTML, CSS, JavaScript, consulting platform. Users can explore the consultant's expertise,
Typescript, React, Web, Node, SQL). testimonials, featured publications, service offerings, and book a free
feedback call. Built with React, TypeScript, JavaScript, JSX, Sass (SCSS),
Book: Head First JavaScript
responsive design, reusable components, and modern UI/UX principles.
Programming: A Brain-Friendly Guide
Source code is proprietary and owned by client.
— Eric Freeman, Elisabeth Robson
Demo

Phone shop – a single-page application for online phone store. User can
browse products, add them to the cart and favorites, search products, sort
products, change the quantity of products per page and amount of pages,
view product details (React, React Router, JSX, Typescript, JavaScript,
LoDash, Fetch Api, Sass (SCSS)).
Demo GitHub Code

Organizer app – a single-page application implements a copy of existing
Todo app. User can add todos, remove or rename them, mark them as
completed, remove todos, sort them by completeness (React, React
Router, JSX, Typescript, JavaScript, LoDash, Fetch Api, Sass (SCSS)).
Demo GitHub Code

Browser Game – a single-player sliding block puzzle game. The game’s
objective is to slide numbered tiles on a grid to combine them to create a
tile with the number 2048 (HTML, CSS, Sass(SCSS), JavaScript).
Demo GitHub Code

PREVIOUS EXPERIENCE
Dropshipping shop founder 2021 - 2023
launched 2 stores on Shopify with an average profit of $500 per
month for the first and $1000 for the second;
created a website in English language, and collaborated with English-
language suppliers;
was searching for a reliable suppliers;
connected the payPal payment system;
launched targeted advertising on Facebook.

CNC machine programmer 2015 - 2022
creating 3D models of parts and then schemes for them in Creo
Parametric;
writing the programs in cncKad by which machine was cutting a part
from the metal list.