Web3 Backend Engineer

TL;DR

Web3 Backend Engineer: Building secure, scalable backend systems integrating IPFS storage with Ethereum-compatible smart contracts with an accent on decentralized file hosting, NFT metadata, and smart billing. Focus on designing backend logic for blockchain access control, optimizing IPFS content access, and ensuring secure communication with blockchain nodes.

What you will do

• Build and maintain APIs and microservices interacting with IPFS and smart contracts
• Develop secure upload, retrieval, and pinning systems for IPFS storage
• Design backend logic connecting decentralized storage with blockchain-based access control
• Write smart contract interaction modules for NFTs, subscriptions, or tokenized services
• Handle user authentication via wallets and integrate on-chain identity
• Collaborate on architecture design with distributed systems and product teams

Requirements

• 4+ years experience in backend development (Node.js, Go, or Python preferred)
• Strong experience with IPFS, including pinning, gateways, and CID management
• Proficiency in integrating Ethereum smart contracts via web3.js or ethers.js
• Familiarity with Solidity smart contracts and on-chain data structures
• Experience with MongoDB, Redis, or PostgreSQL
• Working knowledge of JWT, OAuth, and wallet-based authentication flows
• Comfortable with Docker, CI/CD tools, and scalable backend architecture
• Solid understanding of blockchain fundamentals, dApps, and decentralized identity

Nice to have

• Experience building NFT or token-based platforms
• Familiarity with Layer 2 chains (Polygon, Arbitrum) or cross-chain storage bridges
• Contributions to open-source Web3 backend tools or IPFS projects
• Familiarity with decentralized domain systems like ENS or Unstoppable Domains
• Past experience working in a blockchain-based SaaS or hosting product

Culture & Benefits

• Competitive salary with performance-based bonuses
• Access to top-tier infrastructure and mentorship in decentralized hosting
• Opportunity to shape real Web3 products used by developers and creators globally