Backend Principle Eng Node.js Pro Max

Principal-level guidance for Node.js backend systems and runtime behavior. Optimized for Bun runtime with Node 20 LTS compatibility.

When to Apply

• Designing or refactoring Node.js services and platform components
• Reviewing runtime, event loop, and concurrency behavior
• Diagnosing latency spikes, memory leaks, and throughput regressions
• Planning scalability, cost, or reliability improvements

Priority Model (highest to lowest)