ADVANCED • Scalability and Performance

Endpoint Design Lab for customer profile service #21

This lesson targets improve observability coverage in a realistic customer profile service workflow. You will practice commands: prom-client register.metrics() | webhook signature verification | npm install ioredis bullmq pino. The code example is specific to backend API engineering tasks for this lesson objective.

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If this never completes: start PostgreSQL, check DATABASE_URL and DIRECT_URL in .env, run npx prisma db push. Optional: set SKIP_RUNTIME_CATALOG_SEED=1 to skip heavy catalog seed while debugging.