Senior/Lead Smart Contract Engineer

Smart Gate Technologies and Consulting; United States; On-site; USD 100,000 - 150,000; Full time

Job summary

A leading tech company in Ohio is seeking an experienced smart contract developer to build production contracts in Solidity, focusing on DeFi and perpetuals DEX solutions. The ideal candidate will have a strong background in smart contract security and optimization techniques. This role offers opportunities to work on significant projects requiring deep technical expertise.

Qualifications

• 3+ years building production smart contracts in Solidity.
• Experience with contracts handling significant TVL ($10M+) in production.
• Deep understanding of perpetual futures mechanics.

Skills

Smart contracts in Solidity

Integration with Chainlink or Pyth

DeFi protocol design patterns

Hardhat or Foundry

Smart contract security best practices

Job description

Required Skills & Experience

Must-Have Experience:

• 3+ years building production smart contracts in Solidity
• Direct experience building smart contracts for a perpetuals DEX (this is non-negotiable)
• Deep understanding of perpetual futures mechanics: funding rates, margin systems, liquidation engines, and PnL calculations
• Production experience with oracle integration (Chainlink, Pyth, or custom oracles)
• Strong grasp of DeFi protocol design patterns and composability
• Experience with Hardhat, Foundry, or similar development frameworks
• Track record of contracts handling significant TVL ($10M+) in production

Technical Expertise:

• Advanced Solidity optimization techniques and gas efficiency patterns
• Smart contract security best practices and common vulnerability patterns
• Experience coordinating external security audits
• Understanding of Layer 2 scaling solutions (Arbitrum, Optimism, etc.)
• Proficiency with automated testing and continuous integration for smart contracts