Web3 Full-Stack Developer
Ledgeroom
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 Do**
* Build the DeFiGuard dashboard in React/Next.js — real-time alerts, risk scores, protocol health views, and transaction forensics
* Develop Node.js services that ingest and index on-chain data across Ethereum, Arbitrum, Base, and Optimism
* Integrate wallet connections and transaction signing (WalletConnect, MetaMask, Coinbase Wallet)
* Write and audit Solidity contracts for our on-chain guardrails and alerting hooks
* Build real-time pipelines (WebSockets, event streams) that surface threats within seconds of detection
* Work with our security researchers to translate detection logic into production code
* Own features end-to-end — from spec to deploy to monitoring
### **Required Skills**
* **Frontend:** React, Next.js, TypeScript, React Query, Tailwind
* **Backend:** Node.js, NestJS or Express, PostgreSQL, Redis, REST & GraphQL
* **Blockchain:** Solidity, Hardhat or Foundry, ethers.js or viem, deep EVM fundamentals
* **Web3 UX:** Wallet connection flows, transaction lifecycle, chain switching, gas estimation
* Understanding of common DeFi attack vectors (reentrancy, flash loans, oracle manipulation, MEV)
* Git, CI/CD, Docker, AWS or GCP
### **Nice to Have**
* Experience with The Graph, subgraphs, or custom indexers
* Familiarity with Tenderly, Alchemy, QuickNode, or similar infra
* Rust or Go
* Prior work at a DeFi protocol, security firm, or on-chain analytics company
* Open-source contributions in the Web3 security space
### **What We Offer**
* Competitive salary + token/equity package
* Fully remote with flexible hours
* Budget for conferences, courses, and hardware
* Small senior team — your work ships fast and matters
### **To Apply**
Send your resume, GitHub, and a short note about a Web3 or security project you've shipped (links to live apps or contracts welcome).
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