NO PREPAYMENT!

Blockchain Coursework

Solidity (Ethereum), Smart Contracts, DeFi protocols, NFT/Marketplace, Web3.js/ethers.js, Hardhat/Foundry.

from UAH 4,500 The term is from 10 days

Order in Telegram Order form

Areas of work

Solidity (Ethereum)

EVM-compatible contracts: ERC-20, ERC-721, ERC-1155. OpenZeppelin, upgradeable contracts.

from UAH 4,500

Smart Contracts

Development, testing, auditing. Require/revert, events, modifiers, access control.

from UAH 4,500

DeFi protocols

DEX (Uniswap-style), Lending/Borrowing, Staking, Yield Farming, Liquidity Pools.

from UAH 6,000

NFT / Marketplace

ERC-721/1155 collections, IPFS metadata, marketplace with listing, auction, royalties.

from UAH 5,000

Web3.js / ethers.js

Frontend integration: MetaMask connect, read/write contracts, events listening.

from UAH 4,500

Hardhat / Foundry

Testing, deployment, verification. Hardhat tasks, Foundry forge tests, testnet deploy.

from UAH 4,500

How we work

TK analysis

We study the methodology, determine the requirements and scope of work

Coordination

We discuss details, terms and cost

Implementation

We write code, test, prepare documentation

Demonstration

We show the result, payment after confirmation

What is included in the job

Smart Contracts (Solidity)
Tests (Hardhat/Foundry, >90% coverage)
Deployment on testnet (Sepolia/Mumbai)
Frontend with MetaMask (React/Next.js)

README with instructions
Contract documentation (NatSpec)
Gas optimization
Free edits

Reviews

"DeFi project — DEX with AMM (Uniswap V2 fork). Solidity, Hardhat tests, React frontend. Deployed on Sepolia. Protected the diploma with excellence!"

Oleksiy R.

KPI, Kyiv

"NFT Marketplace - ERC-721, IPFS metadata, listing, buying, auction. ethers.js + Next.js. Everything works, thanks for the explanation!"

Alina P.

LNU, Lviv

"Staking contract for ERC-20 token — reward distribution, timelock, emergency withdraw. Foundry tests, deployment at Polygon Mumbai."

Vlad D.

Gdańsk University of Technology

All reviews

Frequently asked questions

Solidity is a standard for Ethereum and EVM networks (Polygon, BSC, Arbitrum). Rust is for Solana (higher performance, lower fees). For courses, we recommend Solidity as more common.

Ethereum Sepolia, Polygon Mumbai (Amoy), Arbitrum Goerli, BSC Testnet. We use testnet ETH with faucets. Mainnet deployment — upon request and additional fee.

Yes, React or Next.js with ethers.js/wagmi: MetaMask connection, interfacing with contracts, displaying balances, transactions, NFTs. TailwindCSS for styles.

Smart Contracts (Solidity), tests (100+ assertions), deployment scripts, frontend application, README with instructions, NatSpec documentation, gas report.

Simple contract (ERC-20, voting) — from UAH 4,500. NFT/Marketplace — from UAH 5,000. DeFi (DEX, lending) — from UAH 6,000. Complete DApp with frontend — from UAH 7,000.