Web App
An online contract-signing tool for derivatives investment clients. An admin sends a unique link; the client confirms risk, reads the contract, and signs by hand on their phone. The system auto-composes the signed PDF and syncs it back to Airtable — moving a tedious offline process fully online. I designed and built two signing flows (4-step onboarding / 3-step re-signing) and handled real engineering edges: handwritten-signature canvas, server-side PDF composition, idempotent submission, expired links, concurrent writes. Built on Next.js + Airtable + Vercel, mobile-first.