Smart Contract Developer For AI-powered DeFi platform

Location: Remote
Engagement: Contract
Compensation:$55~$85

About ZedAI

ZedAI is a software company focused on AI and blockchain. We help
startups and enterprises build smarter products and grow faster.

ZedAI is building next-generation DeFi infrastructure that combines
on-chain token mechanics, yield protocols, and AI-driven trading
analytics in one non-custodial platform.

Our live product, ZedX, is deployed on Polygon Mainnet and includes a
utility token, staking contract, perpetual futures trading, and token
swap functionality. AI-powered capabilities are actively in
development.

We are looking for a skilled Smart Contract Developer to own and
expand the on-chain layer of the platform.

What You Will Do

* Design and implement Solidity smart contracts that extend our token
and staking infrastructure, including timelocked staking tiers, reward
distribution mechanisms, and governance features.
* Audit and strengthen existing contracts, including ZedxToken and
ZedxStaking, against edge cases, economic exploits, and
upgrade-related risks.
* Write comprehensive Hardhat test suites covering standard user
flows, edge cases, and adversarial scenarios.
* Work closely with the backend team to ensure contract ABIs support
server-side `eth_call` reads and event indexing.
* Support deployments across Polygon, Arbitrum, Base, and Ethereum
Sepolia.
* Contribute to tokenomics design, including supply schedules, APR
curves, and reward pool sustainability.

Required Qualifications

* At least 2 years of production Solidity experience, including
contracts deployed and verified on mainnet.
* Strong knowledge of OpenZeppelin libraries, including ERC20,
Ownable, Pausable, ReentrancyGuard, and SafeERC20.
* Solid understanding of EVM fundamentals, including storage layout,
gas optimization, function selectors, and event encoding.
* Experience writing Hardhat tests with ethers.js or viem, including
time-based testing with `evm_increaseTime` and fork testing.
* Ability to identify and reason about smart contract attack vectors,
including reentrancy, flash-loan manipulation, front-running, and
precision loss in reward calculations.

Preferred Qualifications

* Experience designing staking or yield protocols, such as fixed APR,
ve-tokenomics, or reward-per-share models.
* Familiarity with Uniswap V2 or V3, including routing, liquidity
provisioning, and pool price reads.
* Experience with multi-chain deployments and bridge security
considerations.
* Understanding of account abstraction, ERC-4337, or intent-based
architectures.
* Interest in AI and DeFi, including on-chain data feeds,
agent-triggered transactions, or ML-informed parameter tuning.

Tech Stack

* Smart Contracts: Solidity 0.8.24, Hardhat, OpenZeppelin 5.x
* Testing: Hardhat, Mocha, Chai, ethers.js |
* Deployment Targets: Polygon Mainnet, Arbitrum, Base, Ethereum
* Backend Integration: Node.js, ethers.js Interface, eth_call
* Frontend Context: viem, Next.js, TypeScript

Why Join ZedAI

* Work on contracts already deployed on Polygon Mainnet and
contribute directly to production systems.
* Build at the intersection of DeFi infrastructure and AI-driven
financial products.
* Join a focused team where your smart contract decisions will
directly influence product design and token economics.
* Help deliver a clear roadmap that includes timelocked staking,
governance, cross-chain liquidity, and AI-triggered rebalancing.

How to Apply

Please send the following to here:

* Two or more mainnet contract addresses you authored, with a short
description of each.
* One paragraph describing a non-trivial bug or economic
vulnerability you identified and how you resolved it.
* A GitHub profile or code sample that includes a Hardhat test suite
you wrote.

Applications without on-chain work samples will not be considered.