Senior DeFi Solidity Contract Architect Needed

I’m building a new Ethereum-based protocol and need an experienced Solidity engineer to own the entire on-chain side. The contract suite must seamlessly handle deposits, payouts, detailed package/accounting logic, and enforce lifecycle rules—every one of these functions is equally critical to the project’s success.

Gas optimisation is my top security priority. I expect custom errors, efficient storage patterns, and tight arithmetic that still protects against re-entrancy and rounding pitfalls. You will design a multi-contract architecture, write clean modular code, and keep NatSpec comments and interface docs current so my frontend developer can integrate without friction.

You choose the stack—Hardhat, Foundry, or Truffle—so long as you ship a repeatable deployment pipeline and an extensive test suite that covers both happy paths and revert scenarios. I will take the code through an external audit once your work is complete, so clarity and rigour in documentation are non-negotiable.

Deliverables
• Fully-functional Solidity contracts covering deposits, payouts, package/accounting flows, and lifecycle governance
• Deployment & upgrade scripts ready for testnet and mainnet
• ≥90 % unit-test coverage with clear assertions
• Interface documentation (events, errors, structs) for frontend consumption
• Ongoing support during testnet rollout and mainnet launch

Please include links to at least one on-chain project or verified Etherscan contract you have authored. Let’s build something efficient, secure, and audit-ready.