We are launching a token project and need an experienced Solidity engineer to build a production-ready, time-locked vesting smart contract. We have a hard budget of $500 (Fixed Price - No Negotiation) based on milestones.
We are NOT looking for a standard copy-paste OpenZeppelin script. We need clean, secure, custom logic accompanied by a local testing environment to guarantee safety before we deploy to mainnet.
Technical Requirements:
Language & Standards: Solidity ^0.8.20 or higher. Fully optimized for gas and protection against reentrancy.
The Lock: A strict, unalterable 1-year cliff lockup. There must be zero administrative backdoors or override functions capable of releasing funds early.
Testing Suite (Mandatory): You must deliver a comprehensive Hardhat or Foundry test script. It needs to simulate edge cases (e.g., trying to withdraw at 11 months, verifying failed attacks from unauthorized wallets, and successful withdrawal at month 12).
Etherscan Ready: The code must be thoroughly commented (NatSpec format) and structurally clean so our community can easily read and verify it on Etherscan.
Deliverables:
Complete, deployment-ready .sol file.
The testing script directory with passing test cases.
Brief deployment documentation or a 10-minute walkthrough to ensure successful Etherscan verification.
How to Apply: Please reply with your estimated turnaround time and a link to your GitHub profile showing previous smart contract work.
Note: Applications using copy-pasted AI summaries or generic boilerplate proposals will be immediately rejected. Prove you read this by starting your message with the word "CLIFF".
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