Application Engineer

Own the payment rails at the heart of Revley — multi-PSP routing, tokenization, and subscription billing that move real money for our customers every day. About Revley Revley is building the operating system for the recurring economy. E-commerce. Subscriptions. Telemedicine. Software apps. Small businesseswith recurring revenue. Anywhere money moves on a schedule, the underlyinginfrastructure is fragmented and built by accident. We are building it onpurpose. We start at the foundation — payments and tokenization. From there, afully vertically integrated stack: checkout, subscriptions,multi-processor routing, dispute prevention. All built to work together.Not a collection of integrations. One system. The Role We are hiring a Payments Engineer to own the payment rails at theheart of our platform. This is an independent contractor role with theopportunity to convert to full-time. You will work directly with thefounders and a small senior engineering team on systems that move realmoney for our customers every day. This is a senior, high-ownership role. We are looking for an engineer whohas built and shipped production payment systems end-to-end, makes soundarchitectural decisions independently, and brings deep instincts for theedge cases that define payments — declines, retries, chargebacks,reconciliation. You should be comfortable owning entire flows from specthrough deployment with minimal oversight. Responsibilities Architect and ship multi-PSP payment routing across nine or moreprocessors using strategy-pattern adapters in NestJS and TypeScript Build and maintain network tokenization flows and processor-agnostictoken storage at PCI Level 1 Design and implement subscription billing logic, including CIT checkout,MIT rebilling, authorization holds, captures, refunds, and voids Build webhook consumers for asynchronous processor events across allPSPs Design retry logic, dunning, and reconciliation flows that maximizeapproval rates and recover failed payments Develop custom checkout experiences supporting credit card, Apple Pay,Google Pay, and PayPal Integrate with the Shopify Admin and Storefront APIs for order creation,selling plan management, and merchant onboarding Mentor engineers and contribute to engineering best practices Required Qualifications Five or more years of professional software engineering experience, witha track record of shipping production systems end-to-end Strong backend engineering skills, with deep experience in Node.js andTypeScript (NestJS or a comparable framework) Demonstrated experience integrating payment processors such as Stripe,Adyen, NMI, Airwallex, or Braintree Working knowledge of payment tokenization, vaulting, and PCI complianceprinciples Experience with multi-PSP routing or orchestration architectures Working knowledge of CIT versus MIT transaction flows, authorization andcapture patterns, and webhook event handling Deep experience with relational databases, including SQL and PostgreSQL Demonstrated ability to operate independently in early-stage orhigh-velocity environments Strong written and verbal communication skills Preferred Qualifications Experience with network tokenization and tokenization platforms such asBasis Theory, Evervault, Spreedly, or VGS Experience building checkout flows for Shopify, BigCommerce,WooCommerce, or custom platforms Experience with subscription billing platforms such as Stripe Billing,Recurly, or Chargebee Familiarity with dispute prevention, chargeback management, and approvalrate optimization Our Stack Payment Processors Network tokenization Processor-agnostic token storage PCI Level 1 Wallets & Methods Commerce Shopify Admin & Storefront APIs (GraphQL) Data Tooling Interested? #J-18808-Ljbffr