Senior Software Engineer, Payments
- Level
- Senior
Not stated in the posting: salary, work type, visa.
Open. First seen 2 October 2026.
What this role asks for
Particular to this role
SAP
Rare in Wonderschool's other 11 open postings.
Read against Wonderschool's other open postings on this site.
The team: Engineering HIRES STEADILY
This role is one of 5 open in Engineering. 2 were posted in the last 30 days and the oldest in February: a team that hires all year rather than one being built.
WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS
JavaScript (3 of 5), Python (2 of 5), TypeScript (2 of 5)
OTHER ROLES ON THIS TEAM
- Forward Deployed Engineer – Applied AI posted Oct 17
- QA Engineer posted Oct 2
- Full Stack Software Engineer, Applied AI posted Apr 23
- Early Career Software Engineer – Applied AI posted Feb 10
From the team and dates on Wonderschool's own job board.
About the role
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.
See Software Engineer salaries in San Francisco →
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