Wonderschool

Senior Software Engineer, Payments

About

Senior Software Engineer, Payments Location: San Francisco (Rincon Hill) Company Overview Mission: Make high-quality early childhood education accessible to all by empowering childcare providers with tools and support while helping parents find quality learning environments. What We're Building: A category-defining platform at the intersection of marketplace, SaaS, and public sector systems, increasingly powered by AI. Series B backed by a16z, Goldman Sachs, and First Round. The Role 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. What You'll Do • 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 Who You Are • 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 Compensation & Benefits • Base salary: Competitive market rate • Equity: Significant, meaningful ownership • Full health coverage • Wellness stipend (gym and office) • Travel stipend for certain circumstances Application Apply with your resume and a short note on the most complex payments or integration system you have built. This is a full-commitment, full-ownership role, based in our San Francisco office. You will work very closely with the CEO, in office five to six days a week.

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