- Location
- New York, NY, United States · Remote
- Compensation
- $70k – $110k • 0.5% – 2.0%
- Employment
- Full-time
- Experience level
- MID (2–5 years exp)
- Specialization
- Software Engineer, Wellfound
- Source
- Wellfound
8-month-old bootstrapped fintech. Profitable. Processing real money across Stripe, Adyen, Airwallex, NMI + 8 more. Biggest merchant: $20M/month. 12 enterprise B2B contracts in under a year.
We're hiring Full Stack Engineers to build payment infrastructure — not CRUD apps. Your code processes real transactions for merchants doing $50K–$5M+ MRR. You ship from day one. What you'll build: → Payment processor integrations (strategy-pattern architecture across 9+ PSPs) → Checkout flows — card, Apple Pay, Google Pay, PayPal with PCI Level 1 vault tokenization
→ Subscription billing — CIT/MIT transaction flows, auth holds, captures, refunds, voids → Webhook consumers normalizing async events from Stripe, Adyen, NMI, Airwallex → Shopify integrations — Admin API (GraphQL), Storefront API, script injection, selling plans → Checkout latency optimization (target: sub-5s) Stack: Next.js, NestJS/TypeScript, Supabase (Postgres), Vercel, GitHub Actions, Stripe Connect (OAuth), Adyen, Airwallex, NMI, Shopify Admin API (GraphQL), Linear Must-haves: Next.js, NestJS, TypeScript, SQL/Postgres, Git Strongly preferred: Payment processor integration experience (Stripe, Adyen, Shopify Payments, PayPal, Braintree, NMI). Checkout flow experience. Shopify API. Subscription billing.
Comp: $70K–$110K base + rev share + stock equity options. 1099 contractor. NYC + Remote. USA/Canada only. We care about what you've built, not how many years it took you. Apply: [email protected] — resume + anything you've built