Konstantin

Ligus Konstantin
Junior Full-Stack developer (Next.js, React, Node.js, TypeScript, solidity)

SUMMARY
I am a JavaScript (and solidity) developer and looking for full-time or part-time job position. I have
knowledge on solidity, hardhat, foundry(forge), viem, ethers, The Graph, JS, TypeScript, Next.js (App
Router, Pages Router), wagmi, Next-Auth, LiqPay, React, Node.js, Express, Mongoose, Firebase
(Firestore), AWS SDK, Material UI, HTML, CSS. I am passionate with developing in backend and less in
frontend directions. I like to create something new in IT and work for improve my knowledge. I have
hands-on experience at team-work.

COMMERCIAL PROJECT EXPERIENCE
Marketplace (Frontend: Next.js - App Router, TypeScript, Pinata, wagmi, ethers; Backend: Hardhat,
Solidity, The Graph indexer)
A website for criptonization and selling hotel apartments and infrastructure as NFTs. Selling the hotel
apartment can be done by dividing it into ERC1155 NFT as well as for hotel infrastructure. Each NFT may
CONTACT be sold for USDT. Admin may send incomes to NFT holders.
INFORMATION Write smart contracts: NFT factory, NFT auction, Governance which extend or use OpenZeppelin’s
contracts like ERC20, ERC20Votes, ERC721, ERC1155, Governor, AccessControl, Ownable,
UUPSUpgradeable, Clones, ERC1967Proxy for different purposes using hardhat and foundry. Also I
Ukraine, Kharkiv used foundry(forge) and hardhat with viem or ethers for testing smart contracts.

PET PROJECT EXPERIENCE
[открыть контакты](см. выше в блоке «контактная информация»)
Eco Product online store Link (Backend: Next.js - App Router, AWS SDK, mongoose, Next-Auth,
LinkedIn LiqPay, jsonwebtoken)
A website for selling farm eco products. There is available: to make the choice of the product’s package
size and its quantity, add items in the cart, make order and send to the backend. Sign in and sign up
GitHub available with login, password, email crelentials and with Google. After order creation, customer may pay
order by LiqPay in case card payment method has been choosen. Fulfilled part: all backend part. Role:
backend developer.
[открыть контакты](см. выше в блоке «контактная информация») Ataka Help Link (Next.js - Pages Router, TypeScript, emotion, pdfjs-dist)
A web site with a adaptive layout to help people use Internet resources with care. Fulfilled part:
FileOpenLink component (open pdf files in modal window), Header component (partly), AdminLayout
component (aside admin menu). Role: frontend developer.
CORE SKILLS
Delivery CRM Link (React, React Router, Firebase, Firestore, Bootstrap-4-react)
A website with a responsive layout for creating trips: admin may give different roles for each user who
solidity authorized via google account, google gmail, phone number or facebook. These roles are: passenger,
hardhat driver, dispatcher. Each user may see his role in all trips that he takes part. Fulfilled part: made by
forge(foundry) myself. Role: fullstack developer.
viem SlimMom Link (React, React Router, React Redux Toolkit, Redux Persist, Webpack, Styled
ethers Components, JavaScript).
The Graph A website with a adaptive layout for calculating calories depended of eaten products. Fulfilled part:
Express MainPage, ModalDailyCalorie component, DailyCalorieIntake component (partly), DairyPage (partly).
Mongoose Role: frontend developer.
AWS SDK Filmoteka Link (HTML, SASS, Webpack, JavaScript).
Firebase (Firestore) Application for searching for movies and details about them.
Next.js Fulfilled part: organising and correcting all parts of the project (HTML, SASS, JavaScript).
React Role: Team Lead.
wagmi Icecream Link (HTML, SASS, Parcel).
Material UI A website with a responsive layout about icecream. Fulfilled part: section reviews (HTML, SASS). Role:
Next-AuthJunior developer.
JavaScript
TypeScript WORK EXPERIENCE
Node.js, Full stack developer
LiqPay Crabit.io Apr 2024 - Oct 2025
HTML5/CSS3/SASS
Learned blockchain principles;
Responsive/Adaptive design
Realized business logic using smart contracts;
GIT
Realized interaction with blockchain using web3 (viem, wagmi, ethers).
Develop smart contracts using solidity and OpenZeppelin contracts, create tests using hardhat,
foundry(forge)
SOFT SKILLS
Civil Engineer of concrete construction
Genpro LLC Apr 2021 - Feb 2022
Successfully learned princips reinforcement of concrete;
Ability in analytic mind
Suggested improvement in some families in Revit;
Attention for details
Realized to optimize the printing of drawings.
Civil Engineer of steel construction
LANGUAGES UKRKRANENERGO LLC Aug 2014 - Apr 2022
Structural analysis of load-bearing structures;
Development of project documentation of steel structures of buildings and constructions;
English - Intermediate Development of technical specifications of steel constructions
Ukrainian - Native Providing new methods of structural analysis of steel structures
Russian - Native EDUCATION
Full Stack Developer
IT School GoIT Oct 2021 - Dec 2022
Specialists in Civil Engineering
Kharkiv national university of civil engineering and architecture Sep 2006 - Jun 2011