hassansarfraz

Blockchain Developer

Blockchain Developer with hands-on experience across EVM-based smart contracts and Bitcoin-derived protocol infrastructure, including Bitcoin Core forks, mining pools, node networks, and DNS seed servers. Experienced in building production-style decentralized applications using Solidity, Hardhat, and React.


Experience: 4 years

Yearly salary: $32,000

Hourly rate: $25

Nationality: 🇵🇰 Pakistan

Residency: 🇵🇰 Pakistan


Experience

Blockchain Developer
Ovex Technologies (Remote)
2025 - 2026
Forked the Bitcoin Core codebase to create a custom cryptocurrency with consensus and network parameters. Set up and configured full nodes and mining nodes, including DNS seed servers for peer discovery. Designed and deployed a custom mining pool infrastructure for network hash power distribution. Developed a desktop cloud-mining application that performs mining and AI-related compute tasks, distributing rewards based on contribution. Handled network configuration, node synchronization, and mining stability for production environments. Modified network and runtime configuration parameters to support custom blockchain behavior.
Smart Contract Developer
Bushcoin.IO (Remote)
2024 - 2025
Developed ERC-721 NFT contracts and presale token contracts for a blockchain gaming platform. Designed reusable and modular minting logic to support scalability and future upgrades. Integrated smart contracts with a React frontend using Web3.js and Ethers.js. Improved contract structure and testing practices, reducing testnet deployment issues.
Blockchain Developer
AAK-Tele Science (Remote)
2022 - 2023
Wrote unit tests for Solidity smart contracts using Hardhat with Mocha and Chai. Validated core contract functionality by testing expected behaviors and edge cases. Executed test suites on the local Hardhat network to ensure contract correctness before integration.

Skills

backend
bitcoin
node
protocol-engineer
solidity
english