Crypto Payment Adoption
NFT Memberships
Downtime During Migration
Existing Business Clients
Context
TradeGuild is a B2B procurement SaaS. They wanted to add USDC invoice payments and NFT-based premium membership without migrating their existing Node.js stack. Zero disruption to existing users was a hard requirement.
Challenge
Designing a payment confirmation flow that works reliably across different block confirmation times and handles gas price spikes without timing out user sessions.
Execution
Crypto payment gateway (USDC on Ethereum + Base)
Webhook confirmation service (with retry logic + idempotency)
ERC-721 membership NFT (3 tiers: Silver/Gold/Platinum)
Token-gating middleware (JWT + on-chain balance check)
Admin dashboard for payment monitoring
Zero-downtime migration (feature flag rollout)
Numbers that shipped
Crypto Payment Adoption
NFT Memberships
Downtime During Migration
Existing Business Clients