Founders — Reputation Economy for Founders

Wrapped the Groq AI endpoint in a NestJS service that first checks a Redis cache keyed by the teardown hash. If a result is missing, the service batches up to 10 requests and sends them in a single call, then stores each grade in PostgreSQL. The cache TTL is set to 24 hours, which cuts average latency from 2.8 seconds to 0.4 seconds and reduces API spend by roughly 70 percent.

Defined all credit changes inside database transactions managed by Prisma. Each transaction writes an audit row and publishes an event to a lightweight RabbitMQ broker. Workers consume the event to update cached aggregates in Redis. This approach guarantees atomic updates and keeps the UI in sync through a short‑lived subscription.

Implemented a two‑step verification flow. First, users submit a pledge with a hidden honeypot field; bots trigger the field and are rejected. Second, an email with a single‑use token is sent; the token must be presented before the pledge becomes active. Rate limits are enforced per IP using Vercel Edge Middleware, capping pledges at 5 per hour.

Configured Turborepo to cache each package's build output based on its source hash. Added a pnpm workspace filter so that changes in the UI layer only trigger a rebuild of the React app and its Storybook, while backend changes rebuild the NestJS service alone. Playwright and Vitest run in parallel across three Vercel preview builds, cutting total CI time from 18 minutes to under 7 minutes.