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# Senior Software Engineer, Payments

- **Company:** MAC INC
- **Location:** San Francisco, CA, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Payment Systems, SAP (Applications), Stripe
- **Published:** November 7, 2026
- **Apply:** https://www.juju.com/job/28_25197_4c3213390da26d8460f106346a2376e1

## About the Role

* Senior engineer with a strong payments background and real experience building payment systems and integrations (fintech a plus)
 * Exceptionally high attention to detail; strong finance background is a plus
 * Excited to be close to the build and close to customers
 * Likes working on a small team and moving fast; bias toward action
 * Comfortable with the regulatory landscape around payments, banking, and cards
 * Uses AI tools and figures things out independently

## Description

Own the engineering behind a payments platform that processes at least $3 billion through our platform, working alongside a small, dedicated team. We move money across banking, debit cards, Stripe, SAP, partner advances, and payroll, we run our own billing platform, and we lean on third-party partners for most of our fintech capabilities, so much of this is integration, orchestration, and tracking work. There is a lot to build here. You will consolidate and refactor a system built across many legacy integrations into something clean, reliable, and fast, and you will spend a lot of time directly with customers., * Build alongside a dedicated payments team: consolidate and refactor a payments system assembled from many legacy system integrations

 * Build and maintain integrations across banking, debit cards, Stripe, SAP, partner advances, payroll, and our billing platform
 * Own the orchestration and tracking/reconciliation layer across our third-party fintech partners
 * Design for correctness first, because money movement demands it
 * Work directly with customers to understand real-world failure modes and edge cases
 * Partner daily with product to build, ship, measure, and iterate
 * Build within the laws and regulations governing payments and financial services