Shipped from an empty repository to public listings on both stores in under five months, clearing Apple App Review (Sign in with Apple, privacy labels, EU trader verification) and Google Play's closed-testing gate, Data Safety declarations, content rating, and account-deletion requirements

Architected a Turborepo monorepo shipping one product to three surfaces: a NextJS 16 / React 19 web app, an Expo / React Native iOS and Android app, and a Cloudflare Durable Objects realtime service, sharing ~290 paired web and native components and 3,700+ localized strings from a single source

Built a no-loader, no-layout-shift client: reads paint their final layout on the first frame from a warm TanStack Query cache, writes are optimistic with rollback, and live balances push to every signed-in device over a Durable Object event bus

Designed the data layer: a 48-model Prisma schema on Neon Postgres with 125 versioned migrations, field-level encryption for financial tokens, and 144 API routes as thin adapters over portable domain functions

Integrated Plaid for bank import, and Stripe, Apple In-App Purchase, and Google Play Billing behind one cross-platform entitlement layer

Own quality and release operations: 1,700+ test files, 160 Playwright end-to-end specs, 69 Maestro mobile flows, a pre-push gate (format, lint, typecheck, unit, Postgres integration), a dev to staging to production promotion pipeline with nightly e2e, and EAS over-the-air updates, shipping weekly