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Jordan Vonderwell
Senior Software Engineer specializing in FinTech platforms
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About
Engineer with deep hands-on experience building Square's billing and payments platform in a startup-like environment inside a larger company. They drove a high-stakes PostgreSQL migration, built merchant-facing full-stack features across React/TypeScript, Go, and Python, and designed for PCI-compliant, high-throughput financial workflows with strong observability and production rigor.
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Key Strengths
- End-to-end ownership in a startup-like product environment at Square
- Led PostgreSQL migration and schema redesign for a financial platform
- Built and supported 40+ API endpoints for billing and payment workflows
- Strong full-stack engineering across React/TypeScript, Go, Python, and PostgreSQL
- Designed production systems for scalability with Docker, Kubernetes, and CI/CD
- Improved observability by reducing alert noise through business-impact-based thresholds
- Experience operating under PCI DSS and financial-system reliability constraints
- Handled complex dual-write migration and production write-contention issues
- Translated merchant and compliance requirements into concrete architecture decisions
- Built merchant-facing billing dashboards and backend payment/reconciliation services
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