TartanHacks fintech app with Plaid, XRPL round-ups, and d3 treemaps
Engineered a fintech budget planner in a team of 3 at TartanHacks using a pnpm monorepo (8 packages), Next.js, React, TypeScript, and Supabase auth/PostgreSQL with Vitest fuzz testing and Playwright E2E tests via CI/CD. Built a deterministic analysis pipeline with recurring charge detection (MAD-based confidence scoring), explorable d3-hierarchy treemap with glassmorphic SVG and PNG/SVG export, Plaid Link and Capital One Nessie API for real bank data, and XRPL blockchain round-up micro-savings with Testnet payments.
TartanHacks 2026 project: budget visualization and round-up savings.
• Stack: pnpm monorepo (8 packages), Next.js, React, TypeScript, Supabase auth/PostgreSQL; Vitest fuzz testing and Playwright E2E in CI/CD.
• Analysis: Deterministic pipeline with recurring charge detection using MAD-based confidence scoring.
• Visualization: Explorable d3-hierarchy treemap with nested drill-down, glassmorphic SVG rendering, PNG/SVG export.
• Banking: Plaid Link and Capital One Nessie API for real transaction ingestion.
• Crypto: XRPL blockchain round-up micro-savings with real Testnet payments via xrpl SDK and hex-encoded memo anchoring.