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a16z

Software Is Eating the World

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Wonderschool

a16z portfolio company

Senior Software Engineer, Payments

Location
San Francisco

About the role

Posted Oct 17, 2026

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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At a glance

Location
San Francisco
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You’ll be taken to Wonderschool to apply.

The company

Wonderschool

Wonderschool

At Wonderschool, our mission is to provide quality child care to every child in the world. There is a major shortage of affordable childcare and preschools in the United States; and at the same time, many early childhood educators and young parents struggle to make ends meet. Wonderschool empowers current and aspiring in-home care providers with all the tools and support they need to start, run, and grow a childcare business in their home. By lowering the barriers to entry, we believe we can dramatically increase the supply of quality, affordable care. Wonderschool's platform connects families searching for care with our network of care providers.

Series B51–200 employeesAmerican DynamismConsumer
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