I build token presale / IDO infrastructure — Solidity contracts plus a React front-end, security-first and test-covered.
What you get:
✅ Multi-phase presale contract — soft cap / hard cap, purchase limits
✅ Vesting + cliff schedule, automated claim portal
✅ Merkle-allowlist / whitelist sale
✅ Admin + investor dashboard (React / Next.js), wallet connect
✅ UUPS-upgradeable where useful, Ownable2Step + roles
✅ Foundry unit + fuzz tests, gas-optimized storage, deploy scripts
Public samples: github.com/Fexixreturn/payroll-streams (vested ERC-20 streams, 15 unit + 2 fuzz tests) and github.com/Fexixreturn/nft-collection (Merkle-allowlist, phased drop, ERC-2981, 14 Foundry tests) — verify the patterns yourself. Payment in USDT.
Requirements: tokenomics (phases, caps, vesting schedule), target chain.
