We are building a DeFi staking platform on Ethereum (EVM-compatible) and need an experienced Solidity developer to implement and test core smart contracts. The complete technical specification, architecture diagram, and acceptance criteria are provided in the attached PDF. Please review it before bidding. Key Requirements: Develop secure staking contracts (ERC-20 support) with reward distribution logic Functions: stake(), unstake(), claimRewards(), emergency pause Unit tests with Hardhat/Foundry (≥90% coverage) Preparation for audit: NatSpec comments, gas optimization, reentrancy guards You Should Have: Proven Solidity (0.8.x) & OpenZeppelin experience Portfolio with deployed DeFi/staking contracts (GitHub links required) Strong understanding of EVM security best practices Budget & Timeline: Budget: $2,500 – $4,500 (fixed-price, milestone-based) Timeline: ~3–4 weeks for MVP Payment: 30/40/30 split (start → testnet → mainnet) How to Apply: Download and review the attached PDF with full TASK. https://docsend.com/v/q6nr5/cspdaorequirements