Full Stack Engineer | NYC + Remote | $70K–$110K + Rev Share + Stock Equity Options
Core
Build payment infrastructure processing real transactions for merchants, including integrations, checkout flows, and subscription billing.
Role type
Full Stack Engineer (Payment Infrastructure)
Builds
Payment processor integrations, checkout flows, subscription billing systems, and Shopify integrations.
Domain
Fintech / Payments
Required skills
Next.js, NestJS, TypeScript, SQL/Postgres, Git
Preferred skills
Payment processor integration, Checkout flow design, Shopify API, Subscription billing
Technologies
Next.js, NestJS, TypeScript, Supabase, Vercel, GitHub Actions, Stripe Connect, Adyen, Airwallex, NMI, Shopify Admin API, Linear
Responsibilities
Develop strategy-pattern architecture for payment processor integrations; Implement PCI Level 1 vault tokenization for checkout flows; Build subscription billing transaction flows; Consume and normalize async webhooks from multiple PSPs; Optimize checkout latency to sub-5s; Integrate Shopify Admin and Storefront APIs.