I build production-grade Web3 backends that interact with smart contracts on EVM chains — Base, Ethereum, BSC, and beyond. What you get: Custom API server with on-chain data integration (token info, pool detection, price feeds, contract reads) Smart contract integration via ethers.js — swaps, quotes, multicall, event listening Multi-chain architecture — one backend, multiple networks, shared logic Real-time WebSocket feeds for on-chain events SQLite/PostgreSQL database layer with caching and rate limiting Production deployment: systemd, nginx, SSL, Cloudflare