Senior Blockchain Engineer

About Cowchain

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.

About the Role

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

Requirements

- 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

How to Apply

If you’re interested in joining our team and contributing to innovative blockchain and Web3 solutions, we encourage you to submit your application through our careers portal.

Apply here: https://hirehome.us/company/cowchain/login