Andrii Makar

I am a blockchain developer with strong expertise in designing, building, and deploying decentralized applications and smart contract systems. My work focuses on writing secure, reliable, and gas-efficient smart contracts, architecting scalable blockchain infrastructures, and integrating Web3 protocols with modern backend and frontend environments.

I have hands-on experience with Ethereum, EVM-compatible chains, Layer-2 networks, zk-rollups, and cross-chain ecosystems, as well as development frameworks including Hardhat, Foundry, Truffle, Brownie, and blockchain clients such as Geth and OpenEthereum. My smart contract work commonly uses Solidity, Vyper, or Rust (for Solana/Substrate), supported by thorough unit testing, property-based testing, and security best practices.

Beyond smart contracts, I build full-stack decentralized applications using technologies such as TypeScript, Node.js, React, Next.js, and Web3 libraries like ethers.js, viem, and web3.js. I am also experienced in designing backend services, indexing layers, and automation workflows using GraphQL/The Graph, PostgreSQL, Redis, Docker, Kubernetes, and various cloud platforms.

Security and correctness are central to my development approach. I follow established secure smart contract patterns, perform static analysis, run fuzzing tools, and keep up with the latest research in DeFi, cryptography, bridging, and on-chain governance. I enjoy contributing to open-source projects, reviewing code, and writing clean, maintainable architectures that scale across users and networks.

Above all, I am passionate about advancing decentralized technology—whether through improving protocol efficiency, creating innovative Web3 user experiences, or helping teams turn complex blockchain concepts into production-ready solutions. I excel in collaborative environments, adapt quickly to new tools and networks, and bring a problem-solving mindset to every stage of development.