Senior Solidity Smart Contract Developer

We're seeking a Senior Solidity Smart Contract Developer to lead the design and implementation of core protocol contracts. You'll own smart contracts from architecture through deployment and post-launch monitoring, working closely with auditors, researchers, and frontend engineers. This is a high-ownership role where your code directly secures user funds and shapes protocol economics.

### **Responsibilities**

* Design, implement, and deploy production-grade Solidity smart contracts for lending markets, AMM pools, staking, governance
* Lead contract architecture decisions, including upgradeability patterns, access control, and module boundaries
* Write comprehensive test suites (Foundry/Hardhat) including fuzz and invariant testing; maintain high coverage on critical paths
* Prepare contracts for and coordinate with external audit firms; triage findings and implement fixes
* Build and maintain deployment scripts, CI pipelines, and monitoring/alerting for on-chain activity
* Review teammates' contracts and mentor mid-level engineers on Solidity best practices and security patterns
* Collaborate with protocol researchers on mechanism design and translate specs into safe, gas-efficient code
* Stay current on EVM changes, emerging standards (ERC-4626, ERC-4337, etc.), and known vulnerability classes

### **Requirements**

* 5+ years of professional software engineering experience
* 3+ years writing production Solidity deployed on mainnet (Ethereum or major L2s)
* Deep understanding of the EVM, gas optimization, and common attack vectors (reentrancy, oracle manipulation, MEV, rounding errors, access control flaws)
* Strong experience with Foundry and/or Hardhat, including fuzz/invariant testing
* Proficiency with OpenZeppelin contracts and standard security patterns (checks-effects-interactions, pull-over-push, etc.)
* Experience taking contracts through external audits
* Solid grasp of DeFi primitives and protocol economics
* Strong written communication — you can document design decisions and explain tradeoffs clearly

### **Nice to Have**

* Experience with upgradeable contract patterns (UUPS, Transparent Proxy) and storage layout management
* Solidity/security certifications or public audit contest results (Code4rena, Sherlock, Spearbit)
* Experience with cross-chain messaging (LayerZero, Wormhole, Chainlink CCIP)
* Contributions to open-source protocol codebases
* Familiarity with formal verification (Certora, Halmos) or symbolic execution tools
* Rust or Go experience for off-chain tooling and bots

### **Tech Stack**

Solidity, Foundry, Hardhat, TypeScript, OpenZeppelin, Slither, GitHub Actions, Tenderly, Etherscan APIs

### **What We Offer**

* Competitive salary + token allocation
* Fully remote with flexible hours
* Annual team offsite and conference budget
* Hardware and home-office stipend
* Health benefits (where applicable)

### **How to Apply**

Submit your resume, GitHub profile, and links to deployed contracts or audit reports you've contributed to. Shortlisted candidates will complete a take-home contract exercise followed by a technical interview.