Salary: £100,000 - 100,000 per year Requirements: 3 years of Solidity development experience with production smart contracts Experience working on stable coins Experience shipping audited contracts and mainnet deployments Understanding of EVM, DeFi primitives, and protocol mechanics Solid knowledge of common smart contract vulnerabilities and mitigations Responsibilities: Design, develop, and maintain advanced Solidity smart contracts Contribute to protocol architecture, design patterns, and technical direction Write unit, integration, and fuzz tests using Foundry or similar frameworks Optimize and debug smart contracts for gas efficiency, performance, and security Collaborate with product and backend teams to deliver features Technologies: Backend Security Solidity Blockchain More: We are Plexus, a fast-growing startup in the DeFi space, building core infrastructure for decentralized finance. We offer a competitive salary and the opportunity for fully remote work. Joining us means youll be part of a well-funded startup with strong backing, where you can build core DeFi infrastructure that real users will rely on. last updated 7 week of 2026