markus
Senior Smart Contract Engineer | Solidity | De Fi | Multi Chain | Web3
Senior Blockchain Engineer with 7+ years of experience designing, developing, and auditing smart contracts across EVM-compatible chains including Ethereum, BSC, Optimism, and Arbitrum. Proven track record in building secure DeFi protocols, cross-chain integrations, and scalable dApps using Solidity, Go, and TypeScript. Deep understanding of EIP standards, governance mechanisms, and crypto-economic design. Passionate about open-source development and enabling decentralized financial access at scale.
Experience: 7 years
Yearly salary: $30,000
Hourly rate: $35
Nationality: 🇪🇪 Estonia
Residency: 🇪🇪 Estonia
Experience
Senior blockchain developer
Accenture Europe (Ireland HQ) – France 2023 - 2025
Led the design and development of secure, production-grade smart contracts for enterprise blockchain solutions. Worked across multiple EVM chains, implementing DeFi logic, token standards (ERC-20, ERC-721), and DAO governance modules. Integrated blockchain solutions into large-scale client architectures using Solidity, Go, and TypeScript. Collaborated with global teams on smart contract security audits and protocol upgrades.
Blockchain developer
Polygon 2021 - 2023
Contributed to the development and integration of DeFi smart contracts on the Polygon network. Optimized Layer-2 scaling solutions and implemented protocol features using Solidity and web3 libraries. Collaborated with ecosystem partners on dApp integrations and tokenomics models.
Fullstack developer
Helmes 2018 - 2021
Developed full-stack web and decentralized applications, utilizing Node.js, React, and Solidity. Designed backend APIs and integrated blockchain components into client-facing systems. Built modular smart contracts and conducted testing using Truffle and Hardhat. Participated in end-to-end development of enterprise solutions for fintech and logistics.
Skills
backend
cosmos
full-stack
golang
python
rust
solidity
english