Senior Software Engineer, Payments San Francisco

Wonderschool, Inc.; San Francisco (CA); On-site; USD 180,000 - 260,000; Full time

Benefits offered by this job

Full health coverage

Wellness stipend

Travel stipend

Equity ownership

Job summary

Wonderschool, Inc. is seeking a senior payments engineer to own and advance the platform handling billions in transactions. You will work with a small team to consolidate legacy integrations into a clean, reliable system and directly engage with customers to understand real-world edge cases.

You will build integrations across banking, Stripe, payroll, and billing while ensuring compliance and high reliability in a fast-paced environment in San Francisco.

Qualifications

• Senior engineer with a strong payments background and experience building payment systems and integrations.
• Excellent attention to detail; finance background is a plus.
• Comfortable with payments, banking, and card regulations.
• Bias toward action and customer-facing work.

Responsibilities

• Build and refactor a payments system consolidated from multiple legacy integrations.
• Maintain integrations across banking, debit cards, Stripe, SAP, payroll, and billing platform.
• Own orchestration and reconciliation layer across fintech partners.
• Design for correctness in money movement, with customer-reported failure modes in mind.
• Collaborate daily with product to build, ship, measure, and iterate.

Skills

Payments systems

Systems integrations

Regulatory/compliance

Customer collaboration

Job description

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. Much of this is integration, orchestration, and tracking work. Consolidate and refactor a system built across many legacy integrations into something clean, reliable, and fast. 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
• Base salary: Competitive market rate
• Equity: Significant, meaningful ownership
• Full health coverage
• Wellness stipend (gym and office)
• Travel stipend for certain circumstances

Compensation & Benefits

The role offers competitive base salary, significant equity, full health coverage, wellness stipend, and travel stipend.

Location & Commitment

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.

Application

Apply with your résumé and a short note on the most complex payments or integration system you have built.

Equal Employment Opportunity

As set forth in Wonderschool’s Equal Employment Opportunity policy, we do not discriminate on the basis of any protected group status under any applicable law.