Database

Context usage for cancellation, timeouts, deadlines, and value propagation in Go

Error handling patterns including wrapping, sentinel errors, custom types, and error groups in Go

Go generics including type parameters, constraints, and generic data structure patterns (Go 1.18+)

Concurrency patterns using goroutines, channels, select, and sync primitives in Go

HTTP server patterns using net/http, chi, and gin including middleware, routing, and graceful shutdown

Interface design principles, implicit satisfaction, and composition patterns in Go

Go modules, dependency management, versioning, workspaces, and private module configuration

Table-driven tests, benchmarks, fuzzing, test helpers, and testing best practices in Go