Senior DeFi Engineer - Nexus Mutual

ppbNexus Mutual /b is building a decentralized alternative to traditional insurance, enabling individuals and institutions to protect themselves against risks across the crypto ecosystem. /ppWe are looking for a bSenior DeFi Engineer /b to help design and build the next generation of onchain risk and capital infrastructure at Nexus Mutual. You will work at the intersection of bDeFi, smart contracts, financial engineering, and protocol design /b, building systems that manage real economic value and operate securely at scale. /ppThis is a highly technical role for an engineer who is comfortable going beyond implementing specifications — someone who wants to understand the underlying financial mechanisms and contribute to how the protocol itself should work. /ph3What You'll Do /h3ullipDesign and implement bsmart contracts and DeFi protocols /b that underpin Nexus Mutual's risk, capital, staking, and coverage infrastructure. /p /lilipDevelop and improve mechanisms for bcapital allocation, liquidity, staking, pricing, incentives, and risk management /b. /p /lilipWork closely with protocol, product, and research teams to translate complex financial mechanisms into robust onchain systems. /p /lilipAnalyze existing DeFi protocols and primitives to identify opportunities for integration, optimization, or novel protocol design. /p /lilipBuild integrations with bDEXs, lending protocols, liquidity venues, oracles, and other onchain infrastructure /b. /p /lilipDevelop mechanisms for deploying and managing capital efficiently across different risk and return profiles. /p /lilipContribute to protocol architecture, economic design, and technical specifications — not simply implementation. /p /lilipBuild highly secure, gas-efficient, and composable Solidity contracts. /p /lilipDevelop comprehensive testing, simulations, monitoring, and tooling around protocol behavior. /p /lilipParticipate in security reviews and help identify economic, smart-contract, and integration risks before deployment. /p /lilipInvestigate protocol behavior using bonchain data /b, simulations, and quantitative analysis. /p /lilipWork with engineers and researchers to evaluate potential protocol upgrades and new DeFi primitives. /p /lilipContribute to the broader Nexus Mutual ecosystem through technical documentation, research, and open-source development. /p /li /ulbr/ullipb5+ years of software engineering experience /b, with significant experience building production DeFi or blockchain systems. /p /lilipStrong expertise in bSolidity and the EVM /b. /p /lilipDeep understanding of DeFi primitives, including areas such as: /pullipAMMs and DEXs /p /lilipLending and borrowing /p /lilipStaking and restaking /p /lilipLiquidity provision /p /lilipYield strategies /p /lilipOracles /p /lilipToken economics /p /lilipOnchain governance /p /lilipCapital allocation mechanisms /p /li /ul /lilipExperience designing and deploying bproduction smart contracts handling meaningful economic value /b. /p /lilipStrong understanding of smart-contract security, common attack vectors, and adversarial protocol behavior. /p /lilipStrong understanding of bEVM execution, gas optimization, transaction mechanics, and protocol composability /b. /p /lilipAbility to reason about financial mechanisms and translate them into precise technical implementations. /p /lilipExperience with bFoundry, Hardhat, or comparable smart-contract development tooling /b. /p /lilipStrong testing discipline, including unit, integration, fuzz, invariant, and/or fork testing. /p /lilipComfortable working with bonchain data and blockchain analytics /b. /p /lilipStrong software engineering fundamentals and ability to work independently on complex technical problems. /p /li /ulh3Particularly Valuable Experience /h3pExperience in one or more of the following would be highly valuable: /pullipbDeFi protocol design or mechanism design /b /p /lilipInsurance, risk markets, prediction markets, or financial derivatives /p /lilipLiquidity management and capital efficiency /p /lilipAutomated market makers and pricing mechanisms /p /lilipYield optimization or automated vault strategies /p /lilipAsset management protocols /p /lilipRisk modeling or quantitative finance /p /lilipMEV and transaction-ordering dynamics /p /lilipCross-chain protocols and messaging /p /lilipOracle design and manipulation resistance /p /lilipProtocol monitoring and risk infrastructure /p /lilipBuilding systems that manage b$100M+ in TVL or transaction volume /b /p /lilipContributions to major open-source DeFi protocols /p /li /ul /p #J-18808-Ljbffr