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 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).

Pay: $167,900.00 - $181,900.00 per year

Benefits:

• Dental insurance
• Green card sponsorship
• Health insurance
• Life insurance
• Visa sponsorship
• Vision insurance

People with a criminal record are encouraged to apply

Work Location: Remote