Owned the payment engine processing $150M+ across ACH, wire, check, and card rails for 1,800+ customers with zero payment discrepancies. Led a ten-month migration from Firebase to Python/PostgreSQL with zero downtime, normalizing legacy NoSQL into relational schemas. Built financial controls that passed SOC 2 audits and eliminated 100% of overdraft incidents through a virtual account ledger with real-time balance validation.

Built a generative AI workspace in React/TypeScript that cut campaign setup time by 50% with streaming LLM responses and live previews across Instagram, TikTok, LinkedIn, and X. Engineered a visual scheduler with virtualized drag-and-drop calendar and multi-platform rate limiting that enabled 50,000+ monthly publishes while reducing page load times by 60%. Shipped an analytics dashboard and collaborative approval workflow that boosted user retention by 30%.