Advanced Blockchain Developer

We are hiring an Advanced Blockchain Developer to build production smart contracts and protocol logic for client projects - prediction markets, staking, NFT platforms, token systems, and more.

You will write and test Solidity, collaborate with full-stack teammates, and ship secure on-chain code that handles real value.

Responsibilities

• Implement smart contracts in Solidity (ERC-20/721, access control, staking, markets, rewards)

• Write Hardhat/Foundry tests and deployment scripts

• Integrate contracts with React/Next.js dApps

• Apply security best practices (reentrancy, CEI pattern, role-based access)

• Deploy and verify contracts on EVM networks

• Join architecture discussions and client technical calls

• Support audits and fix findings when needed

3+ years software development; 1+ year shipping Solidity to testnet/mainnet

• Strong Solidity 0.8.x and OpenZeppelin knowledge

• Experience with Hardhat or Foundry

• Understanding of ERC-20, ERC-721, and DeFi patterns (staking, pools, rewards)

• TypeScript for tests and tooling

• Clear English for remote async work

Nice to Have

• The Graph / subgraph development

• Next.js dApps (wagmi, viem, ethers)

• Cross-chain bridges, GameFi, fan tokens

• Smart contract audit experience

• NestJS / Node.js backend for Web3 APIs, * An academic degree in the relevant field is good to have

• 3+ years of commercial experience

• Corresponding level of skills: Blockchain development intermediate

• Language skills: English intermediate

Cowchain is a Web3 development company building dApps, smart contracts, and blockchain products for founders and enterprises. Our team of 50+ Web3-native engineers has delivered 150+ products across DeFi, NFTs, GameFi, bridges, and wallets on Ethereum, Polygon, BNB Chain, and other networks.