Juan Versolato Lopes

TypeScript, Node.js, NestJS, Fastify, Next.js, React. PostgreSQL, Drizzle, TypeORM. Nx, pnpm, Docker, Kubernetes, GCP. RabbitMQ, Redis, OpenSearch. Vitest.

PostgreSQL query planning and Node internals: async context propagation, stack capture, and what it costs to instrument code at runtime.

Two open source tools for database performance in Node: nplusone (finds N+1 queries at runtime) and missing-index (suggests the index your slow query is missing).

Talking about database performance, Node internals, or NestJS architecture. Also code review and pairing on open source — especially if you are debugging something slow.