Able to break down complex problems into simple, clear steps 

Thinks in terms of scalability, failure scenarios, and trade-offs 

Can reason about performance, concurrency, and data flow 

Provides multiple solution approaches and explains why one is chosen 

Goroutines, channels, select 

Concurrency patterns (worker pools, fan-in/fan-out) 

Interfaces and interface-driven design 

Memory management and garbage collection 

Error handling best practices 

Context usage (context.Context) 

Go scheduler and runtime basics 

Escape analysis and performa...