Production

Implement per-user token budgets, tiered model access, request queuing, cost attribution, real-time dashboards, and anomaly detection to prevent AI bill shock.

Deep dive into Bun's production readiness, benchmarks against Node.js, and practical migration strategies with real compatibility gaps and when to migrate.

Master HTTP caching layers from browser to CDN. Learn Cache-Control directives, ETag validation, and production strategies for cache consistency.

Master token counting, semantic caching, prompt compression, and model routing to dramatically reduce LLM costs while maintaining output quality.

Build comprehensive LLM observability using LangSmith, Langfuse, span instrumentation, and LLM-as-judge evaluations to catch quality regressions and optimize performance.

Harden Node.js with Helmet.js headers, rate limiting with Redis, SQL injection prevention, prototype pollution fixes, audit automation, privilege dropping, and --frozen-intrinsics.

Implement zero-downtime secrets rotation with AWS Secrets Manager, blue/green secret versions, and automated password rotation for PostgreSQL and API keys.