Backend Principle Eng JavaScript Pro Max

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

When to Apply

• Designing or refactoring JavaScript services, APIs, and distributed systems
• Reviewing code for correctness, reliability, performance, and security
• Planning migrations, scalability, or cost optimizations
• Incident follow-ups and systemic fixes

Priority Model (highest to lowest)