Full-Stack Developer (React/Node.js) — Blockchain & Web3
DeFiGuard is a real-time risk monitoring and threat detection platform for DeFi protocols. We help users and protocol teams spot exploits, flash loan attacks, oracle manipulation, and suspicious on-chain activity before funds are lost. Our stack spans a React dashboard, Node.js services, and smart contracts across multiple EVM chains.We're looking for a full-stack engineer who can move fluidly between polished frontend work and the backend infrastructure that watches the chain in real time.What You'll DoBuild the DeFiGuard dashboard in React/Next.js — real-time alerts, risk scores, protocol health views, and transaction forensicsDevelop Node.js services that ingest and index on-chain data across Ethereum, Arbitrum, Base, and OptimismIntegrate wallet connections and transaction signing (WalletConnect, MetaMask, Coinbase Wallet)Write and audit Solidity contracts for our on-chain guardrails and alerting hooksBuild real-time pipelines (WebSockets, event streams) that surface threats within seconds of detectionWork with our security researchers to translate detection logic into production codeOwn features end-to-end — from spec to deploy to monitoringRequired SkillsFrontend: React, Next.js, TypeScript, React Query, TailwindBackend: Node.js, NestJS or Express, PostgreSQL, Redis, REST & GraphQLBlockchain: Solidity, Hardhat or Foundry, ethers.js or viem, deep EVM fundamentalsWeb3 UX: Wallet connection flows, transaction lifecycle, chain switching, gas estimationUnderstanding of common DeFi attack vectors (reentrancy, flash loans, oracle manipulation, MEV)Git, CI/CD, Docker, AWS or GCPNice to HaveExperience with The Graph, subgraphs, or custom indexersFamiliarity with Tenderly, Alchemy, QuickNode, or similar infraRust or GoPrior work at a DeFi protocol, security firm, or on-chain analytics companyOpen-source contributions in the Web3 security spaceWhat We OfferCompetitive salary + token/equity packageFully remote with flexible hoursBudget for conferences, courses, and hardwareSmall senior team — your work ships fast and mattersTo ApplySend your resume, GitHub, and a short note about a Web3 or security project you've shipped (links to live apps or contracts welcome).
