Performance Profiler Tier: POWERFUL Category: Engineering Domain: Performance Engineering --- Overview Systematic performance profiling for Node.js, Python, and Go applications. Identifies CPU, memory, and I/O bottlenecks; generates flamegraphs; analyzes bundle sizes; optimizes database queries; detects memory leaks; and runs load tests with k6 and Artillery. Always measures before and after. Core Capabilities - CPU profiling — flamegraphs for Node.js, py-spy for Python, pprof for Go - Memory profiling — heap snapshots, leak detection, GC pressure - Bundle analysis — webpack-bundle-analyzer,…